Paci'fic Gas and Electric CompanyDiablo Canyon ProjectSemi-Monthly Report

Diablo Canyon Seismic Review ProgramFebruary 12, 1982

Summary

This report summarizes the progress of our seismic review program fromJanuary 21, 1982 through the close of business on ilednesday, February 10,1982.

The piping support reviews for the annulus area spectra revisions arecomplete.

Forty-eight Error and Open Items (EOIs) have been received from R. L.Cloud Associates, Inc. (RLCA) for resolution.

PGandE has identified eight new issues under "Other Findings."

A current computer printout from our tracking system is attached to thisreport. All EOIs have been entered. PGandE generated issues will beadded to the tracking system before the next report.

Status of Progress

Annulus Review Status

Civil Engineering

Structures

Verified seismic loads for approximately 90K of the pipesupports reviewed for the revised spectra have beenreceived. Confirmatory analysis of the annulus structuralmembers is 40'X complete.

Conduit Supports

The requalification of conduit supports for revised spectraand raceway weights is 98% complete. It is scheduled tobe complete by February 26, 1982.

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Mechanical Engineering

Mechanical Equipment

All work, including modifications, is complete.

Instrumentation

All work, including modifications, is complete.

Piping

The review of all piping and pipe supports for the revisedspectra is complete. A total of 124 large and small boresupports require modification, excluding small bore rodsupport modifications. All support redesign is scheduledto be complete by February 16, 1982.

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Modification of these supports is in progress and isscheduled to be complete by March 26, 1982.

II. RLCA Error and Open Item Status (EOI's)

Forty-eight EOIs have been received from RLCA. They are listed inAttachment I. The one EOI classified as an error by RLCA, EOI 949,involves the rigidity of the main annunciator cabinet. PGandE iscurrently performing additional analysis to determine cabinetrigidity. The 8 equality Assurance EOIs do not appear to requireresolution by PGandE; however, they are being reviewed to determineif any corrective action should be initiated by PGandE. Theremaining 39 EOIs are open items and are being resolved by PGandE.

III. Other Findings

This section discusses the status of items under review by PGandEwhich are not"related to the original revised containment annulusspectra problem. These include items which have been identified inprevious semi-monthly reports as well as items being reported forthe first time.

Status of Previously Identified Items

Valve Modelling in Piping Analyses

The review of valve modelling in all Unit 1 piping analyses isnearly complete. In addition to the six valves previouslyreported, fourteen additional pipe analyses have been found toc'ontain inaccurately modelled valves. 'Piping reanalysis isscheduled to be complete by March 1, 1982 and supportrequa'lification or redesign is scheduled to be complete tlarch20, 1982.

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Hosgri Spectra Digitization

One Auxiliary Building analysis requires correction due tothe elevation 140 spectra digitization error. It isscheduled to be complete by f1arch 1, 1982.

Raceway Supports

The reverification program is scheduled to be complete byFebruary 26, 1982.

Small Bore Seismic Restraints

hiodification of all Unit 1 single rod supports required toprovide restraint in both vertical directions is scheduledto be complete by February 19, 1982.

New Items

Active Valve Mosgri (}uglification

The first phase of the Hosgri seismic evaluation coveredall equipment needed to bring the plant to and maintain asafe shutdown condition after an earthquake. The secondphase covered the remainder of the Design Class Iequipment. One valve list in the Hosgri Report was notupdated as required by the second phase. "Consequently, weare now reviewing Design Class 1 Active Valves forqualification to the Hosgri Event.

Small Bore Piping Overspans

Certain small bore piping spans which exceed standardspacing criteria, but which were accepted on the basis ofengineering judgnent, have been identified as deviatingfrom seismic criteria.

Additional review and analysis is in progress to determinethe extent and significance of this issue.

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Piping Thermal Analyses

In the course of our piping review of the annulus, we foundtwo piping thermal analyses which used incorrect nodellingof supports.

The analyses are now being rerun. A review of a sample ofother thermal analy'ses will be performed to determine- ifadditional investigation is required.

Seismic Response Spectra Application

Piping with supports attached to the containment internalstructure above elevation 140'ere dynamically analyzedusing elevation 140'pectra. Further analysis is beingperformed to verify the appropriateness of this assumption.

Similarly, piping, electrical raceways, and supportsattached to the containment exterior pipeway weredynamically analyzed using the containment exteriorspectra. Further analysis is being performed to verify theappropriateness of this assumption.

Deviations From Pipe Lug Criteria

Review of piping in the annulus identified one case of pipestress exceeding allowable limits due to a pipe supportdesign with fewer pipe lugs than required by the designcriteria.

All pipe support designs will be reviewed to identifydeviations from minimum pipe lug criteria. Thosedeviations causing local pipe stresses exceeding allowablestresses will be modified.

Seismic Spectra Selection

Review of forty-nine piping analyses for the revisedreoriented Containment Annulus Spectra identified sevenanalyses which used spectra sets not enveloped by allappropriate spectra. The analyses have been rerun withappropriate spectra.

The effect of these deficiencies is being evaluated todetermine if additional reviews are required.

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Plant Exhaust Vent

A question has been raised concerning the dynamicproperties used in the seismic qualification of the PlantExhaust, Vent. An evaluation is in progress to resolve thisitem

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Containment Interior Structure Vertical Dynamic ttodel

In the formulation of the vertical dynamic model of thecontainment interior structure, some masses wererepresented incorrectly. An investigation is in progressto determine the significance of this matter.

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PROGRESS CHART-ANNULUSAREA SEISMIC REVIEW PROGRAM-STATUS AS OF 2-10-82

11/14

PREPARE PIPINGPROBLEMS FORREANALYSIS

REANALYZEPIPING

11/24

12/11

REANALYZETO SUPPORTSAFETY MARGINSTUDY

1/22

2/16

11/17

REVIEW PIPE SUPPORTS FOR LOADSGENERATED BY PIPING ANALYSIS

12/22

CONSTRUCT MODIFICATIONS

REVIEW PIPE SUPPORTS WITHMANUALLYGENERATED LOADS

1/23

3/26

REVIEW INSTRUMENTATION

11/13 11/30 1/6 1/26

REVIEW TUBINGSUPPORTS

11/13

REVIEW MECHANICALEQUIPMENT

11/13 11/23

12/24

FIELDMODIFICATIONS

FIELDMODIFICATIONS

2/6

2/26

PREPARECRITERIA

11/13

REVIEW ELECTRICALCONDUIT SUPPORTS

11/30 3/15

R EV IEW CONC R ETEAND STEEL STRUCTURES

11/13

DETERMINE SPECTRA

CONFIRMATORYANALYSISOF STRUCTURE

10/30 11/6 11/13 11/20 11/27 12/4 12/11 12/18 12/25 1/I /82 1/8 1/15 1/22 1/29 2/5 2/12 2/19 2/26 3/5 3/12 3/19 3/26

0 MILESTONESPROJECTED SCHEDULE

~ COMPLETED MILESTONES~ COMPLETED WORK

ATTACHMENT I

Error and Open Item Tracking System Computer Printoutr

LEGEND

l. TASKS - The number assigned by PGandE for tracking.l%

2. INITIATING DOCUt'IENT - Self explanatory.3'. IDENT DT - Date problem was identified: year-'month-date.

4. ECD - Estimated Completion Date. The computer will enter

99999 until a date is entered.

5. DESCRIPTION - Self explanatory.6.'TATUS - llill'e used to describe status of resolution.7. A'XC - Actual Percent Complete. This information will'e

provided in future reports.8. CLS DT - Closed Date.

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VPM-LOGVERIFICATION LOG — ALL TASKS

TASKff INITIATINQ DOCUMENT IDENT DT ECD... DESCRIPTION. STATUS..

12 FEB 1982 PAGE 1

A/C CLS DT

70000 EOI%910

:I———h,i

70001 EOI%920

70002 EOI%930

811231 999999

811200 999999

820104 999999

THREF OF 20 ELEC RACEWAYSUPPORTS WERE FOUND ATVARIANCE WITH THE PGhEINS'fALLATION CRITERIA.

AUXILIARYBUILDING FLOORRESPONSE SPECTRA IN THE NSDIRFCTION CONTAINED IN THEHOSGRI REPORT DIFFER FROMTHOSE IN THE OCTOIlER 1979BLUME REPORT.

THE RLCA PRELIM. REVIEW OFTHE PQ5E RACEWAY CRITERIAINDICATES THE POSSIBILITY OFUNCONSERVATIVF '..ISMICLOADS.

0

70003 EOI%931

70004 EO I%932

820104

820104

999999 Vhl VE 9001A IS SHOWN ASBEING INSTALLED IN THEHORIZONTAL POSITION. FIELDINFORMATION SHOWS THE VALVEIN A VERTICAL POSITION

999999 SUPPORT 58S-23R IS SHOWN ASA RIGID VERTICAL SUPPORTFIELD INFORMATION INDICATES* DEAD LOAD SUPPORT ONLY.

0

0

70005 EOI%933 820120 999999 AB-BUILT LENGTH OF LINE 110IS SHOWN ON ISOMETRIC AS9. 75 INCHES. FIELDINSPECTION SHOWS THISDIMENSION AS 12 FEET.

0

70006 EOI%934 820120 999999 DIRECTION OF RESTRAINT FORSUPPORT 72/11R IS NOT GIVEN.

0

70007 EOI%935

70008 EOI%936

70009 EOI%937

820120

820120

820120

999999 ISOMETRIC SHOWS A 3 INCHl=INF NO. 931. ATTACHED TOLINE 1971 FIELD INSPECTIONSHOWED NO 3 INCH LINE.

TllE LENGTH OF THE VERTICALRUN Of- LINE 1971 IS SHOWN ON1BOME fRIC AS 2 FEE.T 0INCHl=S. P IELD INSPECTIONSHOWED THIS DIMENSION TO DE2 FEET 10 INCHES.

IBOI'iETRIC DOES NOT SHOW THEBf:CONI> FLANGE ON fHLVl RTI GAL RUN OF LINE 44f-IE:l D INSPECTION SHOWED 1ffELOCATION OF THIS SECOND

0

0

0

VfN-I.OGVERIFICATION LOG - ALL TASKS

TASK¹ INITIATING DOCUhIENT IDENT DT ECD... DESCRIPTION.

FLANGE 13 INCHES ABOVE THEFI f(ST FLANGE.

STATUS.

12 FEB 1982 PAGE 2

A/C CLS DT

70010 EOI +938

4i~ 70011 EOI4939I„„

I

70012 EOI +940

820120

820120

820120

999999

99'9999

999999

Vhl.VE 8805B IS SHOWN ONISDhIETRIC IN A VERl ICALPOSITION. FIELD INSPECTIONSl:OWED THAT THE VALVE IS INA HORIZONTAL POSITION.

SUPPORT 73/72R ON ISOhIETRICIB SHOWN TO BE ACTIVE IN THENS DIRECTION ONLY. FIELDINSPECTION SHOWED THESUPPORT ACTIVE IN BOTH NSAND EW DIRECTIONS.

THE "AS-BUILT" LENGTH OFLINE 103 SOUTH OF SUPPORTS18/2R AND 18/12SL IS SHOWNON ISONETRIC AS 15 FEET 6INCHES. FIELD INSPECTIONSHOWED THIS DINENSION AS 6FEET.

0

0

0

70013 EOI+941,", I

in70014 EOI +942

70015 EOI +943

820120 999999 DIRECTION OF RESTRAINT FORSUPPORT 18/4R ON ISOhIETRICIS NOT GIVEN.

820120 999999 SUPPORT 18/7R:. NOT SHOWNON ISOhIETRIC.

820120 999999 SUPPORT 5006/V IS NOT SHOWNON ISOHETRIC.

0

0

0

70016 EOI+944 820120 999999 SUPPORT 5003/V ON ISOhIETRICIS NOT ADEQUATELY LOCATED.

0

70017 EOI+945 820120 999999 ISOhIETRIC SHOWS LINE 104SUPPORTED AT'THE J COLUhINLINE THE SUPPORTI l)f.Nl ) FICA'I I ON NUI'IBER AhlftTtlE DIRECTIONS OF RESTRAINTAft E NOT SPECIFIED

0

70018 EOI<946 820120 999999 DIIIENSION OF THE VERTICALfIUN OF LINF. 1980 BETWEENVhl.VFS 89?2h AND 8921A ONISOIIB fRIC IS NOT SPEC IFII.D.

0

70019 EOI4947 820120 999999 Vhl.VF 8821A IS SHUWN ON18fthILTRIC AS BEING iNSTAI I C;,D

Ihl 1IIL tIOHIZONthL I'IIUITIONI.)l:I D rhIS»I;I.fruht StlowED lllhfIlil. VALVE rS IN A VLRT ICALf'fISI f ION.

VPM -LOQVERIFICATION LOQ — ALL TASKS

TASK¹ INITIATINQ DOCUMENT IDENT DT ECD... DESCRIPTION STATUS..

12 FEB 1982 PAGE 3

*/C CLS DT

70020 EOI4948 820120 999999 DIRECTION OF RESTRAINT FORSUPPORT 13/23SL ON ISOMETRICIS NOT QIVEN.

0

70021 EOI4949

70022 EOI 4950

70023 EOI +951

0024 EOM9

820120 999999 MAIN ANNUNCIATOR CABINET:(1) ORIQINAL ANALYSISCONSIDERED CABINET RIQID IN1.0NQITUDINAL DIRECTION. (2)ACTUAL FIRST MODE FREQUENCYIS 14 HZ OR LESS BYINDEPENDENT CALCULATION.

820129 999999 PLATES ON FCV-95 SUPPORTSHOWI4 ON DAAWINQ AS 1/2 INCHTHICK FIELD INSPECTIONSHOWED THE THICKNESS TO BE3/8 INCHES.

820129 999999 SUPPORT 1/27R IS SHOWN ONISOMETRIC TO BE LOCATED 9INCHLS FROM THE ELBOW FIELDINSPECTION SHOWED THISSUPPORT TO BE LOCATED 35INCHES FROM THE ELBOW.

20+29 999999 I)IHENSIGN BETWEEN VALVE=FCV37 AND SUPPORT 3/27V ISSHOWN ON ISOMETRIC TO BE 4INCHES FIELD INSPECTIONSHOWED THIS DIMENSION TO BE12 INCHES

0

0

70025 EOI +953 820129 999999 SUPPORT SBS/69R IS SHOWN ON)SOMETRIC TO BE ACTIVE INTHE 2 AND Y DIRECTIONS FIELDINSPECTION SHOWED THISSUPPORT TO BE ACTIVE IN THEXe Y AND 2 DIRECTIONS

0

70026 f01<954 820129 999999 SUPPORT 58S/SbR IS SHOWN ONISOMETRIC TO BE l OCATED 5FEET' INCHES ~M (HE ELBOWFIELD INSPECTION SHOWED THISSUPPORT TO BE L~CATED 7(-EET, 8 INCHES FROM THE ELBOW

0

70027 EOI+955

70028 EOI<956

820129

820129

TWO SUPPORTS. BOTH LABELED588/5/Ri ARE SHOWN ONISOMETR IC.

SU('PORT 585/6~~8 I'=> ".~tli>~hi ONM)METRIC TO B( LO~ATED

P(-(.l PROM THE ELBOW FIELD)Nf)P(-CTION SHOWED THIs

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VP tf-I OGVERIFICATION LOG — ALL TASKS

TASK¹ INITIATINC DOCUMENT IDENT DT ECD... DESCA )P T ION.

SUPPOfIT TO BE LOCATED 2FEET. 1 INCH FROM THE ELBOW

STATUS..

12 FEB 1982 PACE 4

A/C CLS DT

70029 E0190957tI,

l61

70030 EOI +958

820129 999999 I,INES 577 AND 578 AAE SHOWNON ISOMETRIC TO BE INSULATEDFIELD INSPECTION SHOWEDTHESE LINES UNINSULATED

820129 999999 SUPPORT 58S/55V IS SHOWN ON)SOMETRIC TO BE LOCATEDABOVE TI.IE TEE,FIELD)NSPECTION SHOWED THISSUPPOfIT TO BE LOCATED 8INCHES BELOW THE TEE=

0

0

70031 EOI+959 820129 999999 SUPPORT 11/49SL IS SHOWN ONISOMETRIC ADJACENT TO THEREDUCER AT ELEVATION 163FEET ON LINE 20 FIELDINSPECTION SHOWED THESUPPORT TO BE LOCATEDADJACENT TO TIRE DEND ATELEVATION 155 FEET

70033 E019960 820129 999999 "AS-BUILT" ELEVATION OF THEFIRST 45-DECREE ELBOW ABOVETHE HEADER ON L)NE 19 ISSHOWN ON ISOMETRIC ASibbFT-21 INCHES FIELDINSPECTION SHOWED THEELEVATION TO BE 155FT-1 INCH

0

70033 EOI +96)

70034 EOI4962

70035 EOI96963

820129

82012'9

820129

999999

999999

SUPPORT 11/59SL IS SHOWN TOBE ACTIVE IN THE VERTICALD)RECTION ON ISOMETRIC FIELD)NSPECTION SHOWED TWQ SKEWEDSNUBBERS 20 AND 25 DEGREESFIESPFCTIVELY FROM VERTICAL

SUPPORT 48/44R IS SHOWN ON1SOMETRIC TO BE AC) IVE INTHE I.-W DIRECTION FIELD)NSPFCTION SHOWED THISSUf'POF(T TQ DE ACT) VE IN DOT f1

THI: I:W AND NS DIAFCTIONS

SUPPORT 58/32R IS SHOWN UN1SOMETAIC TO DE AC'TIVE INDOTII DIRECTIONS OF RESTRAINT

0

0

0

70036 EOI<964 820129 999999 f If.l D INSt'ECT)QN SHOWED A NSA)C)I) SUF'F'OAT Ut0 L)NE 2519180t)ETAIC Df)F". ' IIQW TIIIQ

VPM-lOGVERIFICATION LOG — ALL TASKS

TASKl) INITIATING DOCUMENT IDENT DT ECD... DESCRIPT ION.

SUPPORT

STATUS.

12 FEB 1982 PAGE 5

AXC CLS DT

70037 EOI+965},~

70038 EOI%966

820129 999999

820129 999999

THF VFRTICAL SPRING HANGFR558/(UNREADABLE) IS SHOWN ON1SONETRIC TO DE LOCATED 7FEET'0-3/4 INCliES FROM THEELBOW BELOW ELEVATION 100FEET FIELD INSPECTION SHOWEDTHIS SUPPORT TO BE LOCATED 8FEET'0 INCHES FROM THEELBOW

SUPPORT 14/33SL IS SHOWN ONISOMETRIC TO BE LOCATED 7FEET. 10-3/4 INCHEB FROM THEELBOW FIELD INSPECTIONSHOWED THIS SUPPORT TO BELOCATED 4 FEET 5 INCHESFRON THE ELBOW

0

0

70039 EOI+967 = =811201 999999 SOME OF THE INTAKE STRUCTURE

MAXINUM ABSOLUTEACCELFRATIONS CON'IAINED INTABLE 1-53 OF THE HOSGRIREPORT DIFFER FROM THOSE INTHE MAY 1979 BLUME REPORT

0

70040 EOI<968

70041 EOI+969

70042 EOI+970

820130 999999

820130 999999

820130 999999

HARDING LAWSON ASSOCIATEDWAS NOT REQUIRED BY PG8(E TOIMPLEMENT A FORMAL QAPROGRAN FOR THEIR ACTIVITIESPRIOR TO APRIL 10'978HARDING LAWSON ASSOCIATES Q*PROGRAN AND OPERATINGPROCLDUREB FOR ACTIVITIESPERFORMED PRIOR TO JUNE 1978DID NOT CONPLY WITH THEAPPLICABLE CRITERIAREQUIREMENTS OF 10CFR50>APPENDIX B

INSUFFICIENT OD JEC TIVEEVIDENCE AVAILABLEATHARDING LAWSON ASSOCIATES TOESTABLISH THAT A CONTROLLEDSYSTEM WAB EFFECT WHICHCCULD DE ACCEPTED ASEQUIVALENT TO 10CFR50iAPPENDIX D

0

0

0

70043 EOI <971 820130 999999 FOR EDS, THE LXISTENCE OF'IHt- "1)ESIGN REVIEW CRITERIA"USED IN ACCORDANCE WITH QAP3. 7o PAR 3. 1 COULD NOT DEVERIFIED

0

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820130 999'999 FOR EDS, IN MANY CASES,"f'OINT OF USE" REFERENCESWERE NOT MADF. FOR EQUATIONSIN THE CALCULATION FILES

820130 999999 FOR EDS IT COULD NOT BEVEftIFIED THAT THE QUALITYASSUlthNCE MANAGER CONCURREDWITH THE RESOLUTION OFDISCftEPANCIES

820130 999999 FOR EDS IT COULD NOT BEVERIFIED THAT PROJECTPERSONNEL HAD READ THEPROJECT INfERFACEINSTRUCTIONS

VPM-I OGVERIFICATION LOG — ALL TASKS

TASK¹ INITIATING DOCUMENT IDENT DT ECD... DESCRIPTION..

C

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70045 EOI +973

l~)i I ",

il"

I.

7004b EOI +974

STATUS

12 FEB 1982 PAGE b

A%C CLS DT

0

0

70047 EOI +975 820130 999999 FOR EDSi MEMORANDA WERE USEDIN LIEU OF TECHNICALINSTRUCTIONS.

0

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