8. Originstor Remarks:

F o r a p p r o v a l

11. Receiver Remarks:

WHC-SD-WMX- "Ai," -9

DATA TRANSMlTTE IC1 I 101

I I I

NFPA HA2 CLASS I F I CATIONS AND COMPLIANCE REGARDING THE ELECTROMAGNETIC INDUCTION PROBE

,. Related E O 1 NO.:

NA

'. Purchase Order No.:

NA

NA

NA

NA

NA

I . Equip./C-nt No.:

IO. Systern/Eldg./Facility:

12. Major Assm. Dug. No.:

13. Permit/Permit Application No.:

IL. Required Response Date:

16 KEY

[I Approved u l c m n t s [I Disapproved W c m n t s

80-7400-172-2 ( 0 4 / 9 4 ) tEF097

80-7400- 172-1 1021891

WHC-SD-WM-DA-224, Rev. 0

NFPA HAZARDOUS CLASSIFICATIONS AND COMPLIANCE REGARDING THE ELECTROMAGNETIC INDUCTION PROBE

TI STOKES, HiLlne Engineering Westinghouse Hanford Company, Richland, WA 99352 U.S. Department of Energy Contract DE-AC06-87RL10930

EDT/ECN: 158628 UC: 2030 Org Code: 75250 Charge Code: N4HBB B&R Code: EW3120074 Total Pages: 16

Key Words: Electromagnetic Induction (EMI) Probe, Surface Moisture Measurement System (SMMS), neutron, connector(s), National Fire Protection Association (NFPA).

Abstract: This document discusses how the ElectroMagnetic Induction probe complies with the hazardous locations discussed for the Surface Moisture Measurement System (SMMS). probe head was designed to interchange with the neutron probe of the SMMS.

The EM1

TRADEMARK DISCLAIMER. Reference h e r e i n t o any s p e c i f i c c m r c i a l product, process. o r serv ice by trade name, trademark, manufacturer, o r otherwise, does Mt necessar i l y c o n s t i t u t e o r i a p l y i t s endorsement, reconrrndat ion, or favor ing by the Un i ted States G o v e r m n t or any agency thereof o r i t s con t rac tors o r s t h o n t r a c t o r s .

P r i n t e d i n the Un i ted States of America. To o b t a i n copies of t h i s d o c m t . contact : UHC/BCS D o c m t Cont ro l Services, P.O. Box 1970, Mai ls top H6-08, Richland WI W352, Phone (509) 372-2420; F ~ X (509) 376-6989.

Approved for Public Release A - G O O - 0 7 3 (10195) GEF321

WHC-SD-WM-DA-224, REV 0

NATIONAL F I R E PROTECT I ON ASSOCIATION (NFPA) HAZARDOUS CLASS I F K A T IONS AND COMPLIANCE REGARDING

THE ELECTROMAGNETIC INDUCTION PROBE

AUTHOR L I S T

T . I . STOKES S. D. TOMICH

D a t e d July 1996

WHC.SD.WM.DA.224, REV 0 Page 1 o f 13

TABLE OF CONTENTS

1.0 EXECUTIVE SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

2.0 SYSTEM OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

3.0 EQUIPMENT COMPLIANCE WITH HAZARD CLASSIFICATION . . . . . . . . . . . . . . . . 3 3.1 DEPLOYMENT DEVICE UPPER ENCLOSURE(S) . . . . . . . . . . . . . . . . . 3 3 . 2 DEPLOYMENT DEVICE MAST & ARM . . . . . . . . . . . . . . . . . . . 4 3.3 E M I P R O B E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 .4 MISCELLANEOUS EQUIPMENT ADJACENT TO DEPLOYMENT DEVICE . . . . . . . 4

4.0 REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

A p p e n d i x A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 I n t r o d u c t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 T a b l e A l . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 G r o u n d i n g a n d B o n d i n g . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

WHC-SO-WM-DA-224, Page 2

REV 0 o f 13

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA) HAZARDOUS CLASS I FICATIONS AND COMPLIANCE REGARDING THE

ELECTROMAGNETIC INDUCTION PROBE

1.0 EXECUTIVE SUMMARY

Th is document discusses how t h e ElectroMagnetic Induc t i on ( E M I ) probe complies w i t h the hazardous l o c a t i o n s discussed f o r t he Surface Mois ture Measurement System (SMMS), document WHC-SD-WM-DA-EO2 Rev. 0. probe o f t h e SMMS.

The EM1 probe head was designed t o in terchange w i t h the neutron

In terchanging an EM1 Probe w i t h the neutron probe o f t he SMMS has ve ry l i t t l e SMMS hardware impact. Therefore, t h i s document re1 i e s p r i m a r i l y on t h e ’NEC HAZARDOUS

WM-DA-202 REV 0, J. H. Bussel l and T. I . Stokes, dated May 9, 1996. See the SMMS engineer ing work p l a n (WHC-SD-WM-WP-200 Rev. 1) f o r t he background o f t he SMMS p r o j e c t , which i nc ludes EM1 and neutron probes.

S ignature on t h i s document’s EDT ind i ca tes concurrence by the techn ica l community and the Hanford E l e c t r i c a l Codes Board (HECB), t he Hanford S i t e “Au tho r i t y Having J u r i s d i c t i o n ” (AHJ), t h a t t he EM1 Probe may be interchanged w i t h the neutron probe, according t o the design drawings and procedures, and when thus conf igured, i s approved f o r use i n any o f Hanford’s waste tanks, i n c l u d i n g those c l a s s i f i e d as Class I , D i v i s i o n 1, Group B Hazardous l o c a t i o n s as de f i ned by the Nat ional F i r e P r o t e c t i o n Associat ion (NFPA).

CLASSIFICATIONS AND COMPLIANCE REGARDING THE SURFACE MOISTURE MEASUREMENT SYSTEM”, WHC-SD-

2.0 SYSTEH OVERVIEW

The EM1 probe head i s designed t o measure the mois ture i n the near sur face l a y e r s o f tank waste us ing the eddy c u r r e n t technology. mois ture l e v e l encountered and t h e probe must be placed on the sur face o f t he waste t o make these measurements.

The EM1 Probe screws d i r e c t l y onto t h e neutron probe i n t e r f a c e cable head. The EM1 Probe has two i n t e r n a l pancake c o i l s . These c o i l s are rou ted through coax ia l cables t o a connector, which mates w i t h the cable head connector used f o r t he neutron probe. c o i l s and connectors are mechanical ly housed w i t h i n a probe housing, comprised o f s t a i n l e s s s t e e l and semi-conductive polypropylene. See F igure 1 f o r a drawing o f t he EM1 probe as a s tand alone e n t i t y .

box, through a se t of mercury wetted s l i p r i ngs , and terminated on a se t o f i n t r i n s i c b a r r i e r s s p e c i a l l y se lected t o p r o t e c t t he neutron probe. be passed through t h e e x i s t i n g b a r r i e r s . Therefore, a new s e t o f b a r r i e r s were added i n s i d e the SMMS deployment dev ice e l e c t r i c a l enclosure. These b a r r i e r s are s p e c i a l l y se lected t o n o t o n l y func t i on w i t h EM1 s ignals . b u t t o p rov ide an i n t r i n s i c a l l y safe EM1 c i r c u i t w i t h i n t h e tank.

The depth o f i n t e r r o g a t i o n depends on the

The

The coax ia l cables had rou ted from t h e cable head connector, through the SMMS winch

However, EM1 s igna ls could no t

See appendix A f o r a d e t a i l e d c i r c u i t schematic, and

WHC-SD-WM-DA-224, REV 0 Page 3 o f 13

c a l c u l a t i o n s showing t h e c i r c u i t inductance, capacitance, and b a r r i e r r a t i n g s .

i n t r i n s i c b a r r i e r s . a l l ow f i e l d operat ions t o con f igu re t h e e l e c t r i c a l c i r c u i t f o r e i t h e r EM1 probe o r neutron probe. terminated on t h e c o r r e c t b a r r i e r s .

The coax ia l cables had BNC connectors i n s t a l l e d a f t e r t h e s l i p r i n g s , b u t p r i o r t o the Each p a i r o f b a r r i e r s has BNC p i g t a i l s on t h e ou tpu t side, which

Th is document does n o t d iscuss t h e EM1 system once t h e coax ia l w i res are

3.0 EQUIPMENT COMPLIANCE WITH HAZARD CLASSIFICATION

Th is s e c t i o n has been made t o match w i t h the neutron probe document, WHC-SD-WM-DA- 202, t o p rov ide con f i rma t ion t h a t mod i f i ca t i ons have n o t been made by EM1 probe opt ions t h a t i n v a l i d a t e prev ious design bases.

3.1 DEPLOYMENT DEVICE UPPER ENCLOSURE(S)

3.1.1 Winch Enclosure

There are no e l e c t r i c a l components besides cab l i ng t h a t passes through t h i s space. A l l e l e c t r i c a l c a b l i n g passing through t h i s space i s i n t r i n s i c a l l y safe, w i t h the neutron o r EM1 b a r r i e r s us ing t h e BNC connectors i n the e l e c t r i c a l enclosure.

Connecting t h e wrong b a r r i e r p a i r i s poss ib le because t h e neutron probe and the EM1 probe u t i l i z e BNC connectors f o r hookup. The neutron probe u t i l i z e s i n t r i n s i c b a r r i e r s WST- EB-2201 and WST-EB-2202 (drawing H-14 100485, page 1 o f 2, Rev 0). These b a r r i e r s are Stahl b a r r i e r s p a r t number 9002/77-150-300-00. The EM1 probe u t i 1 i z e s i n t r i n s i c b a r r i e r s WST-EB- 2205 and WST-EB-2206 (drawing H-14 100485, page 1 o f 2, Rev 0) . These b a r r i e r s are Stahl b a r r i e r s p a r t number 9002/22-240-160-00.

S p e c i f i c a t i o n s from the Stahl cata log:

B a r r i e r Vmax R - - TABLE 1

!& & pt Caluf ) L a h h l

9002/77-150-300-00 212 118 14.5 138 .SO0 .85 1.6 (Neutron probe)

9002/22-240-160-00 k9.5 167 11.3 74 (EM1 probe)

.207 2.0 6.5

There are two cases f o r misconnection: CASE 1: EM1 Probe connected t o Neutron Probe Bar r i e rs .

The neutron probe b a r r i e r p r o t e c t s a system w i t h up t o .85 Ca and 1.6 La. As shown i n t a b l e 1 above, t h e p ro tec ted p o r t i o n o f t he EM1 system on ly has .016 C t and .075 L t , r e f e r t o the i n t r i n s i c b a r r i e r t a b l e A 1 i n Appendix A. Also, under f a u l t e d condi t ions, t h e neutron probe b a r r i e r would a l l o w up t o 14.5 Voc on the

WHC-SD-WM-DA-224, REV 0 Page 4 o f 13

EM1 probe, which would n o t cause s h i e l d breach o r any c i r c u i t breakdown. The EM1 probe can operate s a f e l y a t 14.5 Voc and 138 I sc , t he re fo re , t h e EM1 probe would remain i n t r i n s i c a l l y safe.

The EM1 probe b a r r i e r p r o t e c t s a system w i t h up t o 2.0 Ca and 6.5 La. As shown i n t a b l e 1 above, the p ro tec ted p o r t i o n o f t he Neutron system o n l y has .026 C t and .020 L t . Also, under f a u l t e d condi t ions, t h e EM1 probe b a r r i e r would a l l ow up t o 9.5 Voc on t h e Neutron probe, which i s n o t enough vo l tage t o operate i t o r cause any c i r c u i t breakdown. The Neutron probe can be powered s a f e l y a t 9.5 Voc and 74 I sc , t he re fo re , t he Neutron probe would remain i n t r i n s i c a l l y safe.

CASE 2: Neutron Probe connected t o the EM1 Probe Bar r i e rs .

SUMMARY

The main e f f e c t o f t he EM1 probe when used w i t h the neutron b a r r i e r s would be a change i n the resonant f requencies caused by the b a r r i e r s own res is tance, capacitance, and inductance values. Th is change would r e s u l t i n m i s i n t e r p r e t a t i o n o f t h e data and inaccurate mois ture readings;

Both t h e neutron probe and t h e EM1 probe can use t h e same b a r r i e r s and remain i n t r i n s i c a l l y safe. The performance and measuring c a p a b i l i t i e s o f each system i s a f fec ted by the d i f f e r e n c e i n b a r r i e r s which necess i ta tes t h e i r choice f o r each probe system.

3.1.2 E l e c t r i c a l Enclosure

Th is box i s considered a non-c lass i f i ed l o c a t i o n . Th is box conta ins i n t r i n s i c sa fe ty b a r r i e r s f o r t he EM1 probe, t h e neutron probe, and t h e i nc l i nomete r . e l e c t r i c a l equipment i n t h i s box must comply w i t h requirements o f any c l a s s i f i e d l oca t i on .

3.2

None o f the

DEPLOYMENT DEVICE HAST & ARM

There are no e l e c t r i c a l components besides the EM1 probe and the c a b l i n g t h a t res ide i n t h i s space. A l l e l e c t r i c a l c a b l i n g passing through t h i s space i s i n t r i n s i c a l l y safe.

3.3 EN1 PROBE

The EM1 probe cons is t s o f two eddy c u r r e n t c o i l s spaced 5 inches apar t w i t h i n a semi-conductive p l a s t i c housing which i s attached t o the p rev ious l y approved SMMS deployment arm, enclosure, and data a c q u i s i t i o n van. The eddy c u r r e n t c o i l s are connected t o approximately 50 f e e t o f RG-174U coax which i s terminated on t h e safe s ide o f an i n t r i n s i c b a r r i e r . The i n t r i n s i c b a r r i e r prov ides fo r t he opera t i on o f t he EM1 probe i n a Class I, D i v i s i o n 1, Group B l oca t i on . See Appendix A f o r a more d e t a i l e d d iscuss ion.

3.4 HISCELLANEOUS EQUIPMENT ADJACENT TO DEPLOYMENT DEVICE

Th is space i s considered a non-c lass i f i ed l oca t i on , once the deployment dev ice i s f u l l y i n s t a l l e d and the r i s e r b o l t s have been torqued. immediate v i c i n i t y of a r i s e r should no t be energized u n t i l t ank containment i s rees tab l ished/sealed.

E l e c t r i c a l equipment i n the

WHC-SD-WM-DA-224, REV 0 Page 5 of 13

4.0 REFERENCES

WHC-SD-WM-DA-202 Rev. 0, 'NEC Hazardous Classification and Compliance Regarding the Surface Moisture Measurement System"

WHC-SD-WM-WP-300 Rev. 0, Engineering Work Plan for Surface Moisture Measurement

ANSI/NFPA 70, "National Electrical Code - 1993"

ANSI/ISA-RP12.6-1987, 'Inskallation of Intrinsically Safe Systems for Hazardous (C1 assi f ied) Locations.

Class Number 3610, "Approval Standard - Intrinsically Safe Apparatus and Associated Apparatus for Use in Class I, 11, and 111, Division 1 Hazardous (Classified) Locations", October 1988

SMMS Drawing Tree - H-14-100457

WHC-SO-WM-DA-224, REV 0 Page 6 o f 13

APPENDIX A

WHC-SD-WM-DA-224, REV 0 Page 7 of 13

INTRODUCTION

Drawing set 9605-HEF-006 (attached) shows the EM1 system and the demarcation between intrinsically safe portion of the system and the non-intrinsically safe portion of the system. The EM1 has two electrical coils which are operated through an intrinsic barrier. appropriately chosen intrinsic safety barrier.

safety parameters. open circuit voltage, maximum short circuit current, maximum allowed capacitance, and maximum allowed inductance in the intrinsically safe apparatus, e.g. the eddy current coils.

Therefore the EM1 probe is a simple device and is intrinsically safe with the

Intrinsic safety parameters were selected for the EM1 on the basis of their entity Entity safety parameters are those parameters that define the maximum

Manufacturers seek approval for their intrinsic safety barriers using entity approval Listing by entity parameters allows interchangeability between manufacturers and concept.

permits intrinsically safe systems to be easily qualified by verifying the correct relationship between entity safety parameters of a intrinsically safe apparatus and a intrinsic safety barrier. parameters between the intrinsically safe apparatus, e.g. eddy current coils, and the associated intrinsic safety barrier and attached instrumentation.

Table A1 shows the relationship between entity safety

The EM1 probe consists of a probe housing which contains an eddy current coil, a nylon spacer, a second eddy current coil, a polyethylene spacer, and the appropriate stainless steel connectors necessary to attach the probe to the SMMS deployment arm system. The signal supplied to the probe is provided through two intrinsically safe circuits contained in one intrinsic barrier. 74 mA o f current at

Each intrinsically safe circuit can provide 9 V for the operation of the eddy current coils.

WHC-SD-WM-DA-224, REV 0 Page 8 of 13

Entity Safety Parameters for Intrinsic ! Stahl 9002/22-:

I G S c, lnkinsiu Barrier C i u i t

fety Barrier for EM1 Probe Coils 0-160-00

WHC-SD-WM-DA-224, REV 0 Page 9 o f 13

GROUNDING AND BONDING

The probe housing i s bonded t o t h e s h i e l d wi res o f t h e two 18 AWG w i res as w e l l as the sh ie lds o f t h e two RG-174 coax wires. The s h i e l d wi res are bonded t o the ground bus o f the i n t r i n s i c sa fe ty b a r r i e r l oca ted i n the mast head. The res i s tance o f t h e two s h i e l d wi res i s l e s s than 2 ohms.

The probe cable i s t h e exact same cable as used by t h e neutron probe. The j a c k e t i s comprised o f semiconductive p l a s t i c t h a t w i l l d r a i n t h e e l e c t r o s t a t i c charge induced as a r e s u l t o f be ing r o l l e d o f f o f t he winch, passing down through t h e mast, and r o l l i n g over the shoe assemblies a t t h e end of t h e arm. The semiconductive p l a s t i c i s LNP Engineering P1 a s t i cs Stat-Kon-ME'. The surface resistivity is 10' to 106 ohmdsquare and 102 to 106 ohms-cm. The EMI Probe body is constructed of the same plastic from the same vendor.

'LNP Engineering Plastics and Stat-Kon-ME are trademarks of LNF' Engineering Plastics.

I Intrinsically Safe Area - - - - - - ,

! Intrinsic Barrier

31 Stan D. Tomich

Zetec MIZ - 40A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4/5/96 9605-HEF-006 1

lnstrinsic Enclosure

I Eddy Current I Coils I

I I Referenm - I I

Absolute -

’- Zetec MI2 - 40A

WasteTank I I

Deployment Arm I I I I I I I I I 5? I 400 Khz

/Eddy Coils

I 1 l - P W 3 8 0 4 - 3 - C

I Semi-conductive Plastic EM1 Head I

I

HiLine Engineering & Fabrication, Inc.

Electromagnetic Induction Surface Moisture Monitor

(UNLESS OTHERWISE SPECIFIED)

1. DECIMAL DIMENSIONING AND TOLERANCING PER ANSI Y14.5M-82. DIMENSIONS ARE I N INCHES. TOLERANCES' .X .XX .XXX ANGULAR

+ or - I .10 ,003 ,001 I DEGREE

2, ALL MACHINED SURFACES SHALL BE 125 RMS OR BETTER I N

3. BREAK ALL SHARP EDGES AND REMOVE ALL BURRS. ACCORDANCE WITH ANSI 646.1 (LATEST REVISION).

USE RG-174U COAX F A 8 REQUIRED

NC CONNECTORS MIL-SPEC PLUG MATES TO SMMS CABLE HEAD CONNECTOR

EM1 PROBE ASSEMBLY

0.18

8PL EVENLY SPACED AROU

0.25' DIAM THRU

PLASTIC BODY

2 000 01875 REF

'8PL EO SPACED 0.200 THRU

NUDIF!ED SCREW

TUNGSTEN WE!GHT

FOR GENERAL NOTES, AND PARTS LIST, SEE SHEET 1 .

06-04-1996 15:59 509c3761293 4 JUN-U4-Y6 'I'Ut I4 : 33

Probe Probe Groove Groove ' AWG# PIN OD Depth Width

M13804.l-A 3.000" ,675'' .100" 23 Mi3804-2-6 3.000'' ,700' ,080" 20 DX3804-3-C 3.000'' ,450 ,075" 20

MESTINGHOUSE

#of Inductance Resistance Turns

95 675pH 1.33fl 45 151pH .43a 23 55kH .31C2

Telephone (206) 392-5376 ZETEC P.pO?

WHC-SC-WM-DA-&?~, REV 0 Page 13 of 13

Trlefax (206) 392-2086

The material specifications for the Polypenco@ Nylon 101 ar t attached. I do not have any specifications for its radiation limits.

The insulation material on the magnet wire IS Therm-Amid (see attached)

If you have any further questlons or if you need any other information, please call

Best regards,

ZETEC,INC

Tom Zistatsis' l Probe Design Specialist

tutz

Zetec, Inc., 1370 NW Mell Street, PO Box 140. Issaqurh, WA 98027-0140 I

From

Development

To D i s t r i b u t i o n Charac te r i za t i on Equipment

Project TitleNVork Order NFPA Haz C l a s s i f i c a t i o n s And Compliance Regarding The Electromagnetic Induc t i on Probe

CM Monasmith GF Vargo (3) Centra l F i l e s P ro jec t F i l e s

Page 1 of 1 Date 08/09/96

EDT No. 158628 ECN No.

E6-27 X H5-09 X ~ 3 - 8 8 X H5-09 X

Text Text Only Name MSlN With All

Attach.

A-6000-135 (01193) !JEW67

Attach./ EDT/ECN Appendix Only

Only