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Westinghouse Water Reactor ba :

Electric Corporation Divisions Prnr@ Pe%,Nna 150^"

May,7, 1979

'WRD-LSSS-754 q W%p

REGIVED, .

U. S. Nuclear Regulatory Commission 2- '-

.!

Of fice of Nuclear Material Safety & Safeguards Z N4Y2 g 793'-''S s

'~~

Division of Fuel Cycle & Material Safety (\ "w...,-

.

7 '' ' 'Washington, D. C. 20555 \ [,,

\< 'y

Attention: L. C. Rouse, Acting Chief,

Fuel Reprocessing & Fabrication Branch - _

Gentlemen:

Subject: Application for Exemption, License SNM-ll20, Docket 70-11*?

The Westinghouse Electric Corporation hereby transmits a request for '

an amendment to License Sh?1-ll20, Docket 70-1143 to authorize an ex-emption from the time period requirements of ICCFR70.58 (i) (2) .

*

Please find enclosed a check in the amount of $150.00 payable to theU. S. Nuclear Regulatory Commission as payment for this request.

..

The amendment should be sent to me at the above address.

If you have any questions regarding the matter, please write me at ,

the above address or telephone me on 412-373-4652.I

Ver truly y,ours,, .

- f y ,il fI U

Ronald P. DiPlazza, ManagerNES License Administration -

/slw

Attachments *

ME PAD

-_

79070604gt,I)-799/nw

.. s Tf_ /*,

,

.

WESTINGHOUSE ELECTRIC CORPORATIC:.

NUCLEAR FUEL DIVISION

License SNM-1120 Docket 70-1143

29/, 206 12799

The Westinghouse Electric Corporation hereby requests exemption from the

time period requirements specified in 10 CFR 70.58(i)(2).

The Westinghouse Advanced Reactors Division (ARD) operates within the

Plutonium Fuels Development Laboratory's (PFDL's) License SNM-ll20 in

advanced fuels programs through DOE contract. SNM that remains as unopened

receipts and SNM scrap generated by process operations must be returned to

the DOE as part of this contract. Both groups of material are declared on239DOE Fonn #RL-Sll A, " Request for Plutonium Scrap Processing Services,"

herein after referred to as " scrap declarations."

Westinghouse has submitted four scrap declarations totaling 12,176 grams235plutonium and 9,967 grams uranium contained in 14,898 grams uranium to

the DOE Richland Operations Office for approval. To date, only one of the

declarations has been approved for shipment. Of the total declared scrap,

235216 grams plutonium and 390 grams uranium contained in 507 grams uranium

have a measurement uncertainty greater than 110%. All DOE scrap remains on

inventory until Westinghouse receives approval of the scrap ceclaration.

These declarations are the vehicles used to disposition and remove scrap

material from the license inventory. Upon receipt of DOE approval and their

designation of a reprocessing facility (consignee), Westinghouse (consignor)

is authorized to ship the declared scrap by a DOE specified date. The

lengthy amount of time involved in receiving DOE's approval presents a

problem to the PFDL's License SNM-1120 for compliance with the 10 CFR

70.58(i)(2) time limitation for regular processing and recovery of scrap

having a measurement uncertainty exceeding 110%.

2(/[ 29(

- 2-

From an analytical :neasurements standpoint, analysis of the DOE-owned SNM.

scrap material to +10% uncertainty presents a major problem. The scrap

consists of graphite crucibles containir q a solid nickel melt, wheel dress-

ings, fil ters, and carbon scrap. Analysis of thir scrap by the more precise

destructive assay methods would be difficult, uneconomical, and time

consuming.

Therefore, the approach taken by Westinghouse PFDL for scrap analysis is

aondestructive assay. The NCA system consists of an intrinsic germanium

detector, multichannel analyzer, and associated modular electronics. The

system is calibrated over the expected range of usage with standards

235 )--the unknowns are analyzedcontaining known quantities of SNM (Pu and U

against these standards. The current calibration range for the NDA system

limits the maximum amount of SNM in any unknown to 15 grams Pu and/or

23515 grams U.

In order to correlate the SNM standards data with the unknowns, a brief

suninary of the applicable statistics is presented. The relationship of N

known working standard quantities of SNM (X) to corresponding net counts (Y)

is nonlinear when fitting a line by least squares to the N_ points. In

Section 3.3.10 of Jaech's book, Statistical Methods in Nuclear Material

Control, he states that calibration data can be transformed logarithmically

into a linear relationship by using the statistical model:

Log Y = Log a + b Log X (Y = aX )

90 -) n 7./', t. t ; I

-3-

Formulas identified in Section 3.3.8 for calculating the random and

systematic error associated with the unknowns were. modified (by Mr. K. R.

Kussmaul of Westinghouse R&D Center, System Services, Mathematics Department)

to "back '.ransform" the log msults into metric results. These nudified

calculations are applied to the SNM scrap. Models of NDA scrap data

identifying measurement uncertainties are charted on Attachments A-1, A-2,

and A-3.

235 ) with their respec-A sumary of the NDA results for total SNM (Pu and U

tive relative limit of error is presented in Table I:

'

TABLE I

Total TotalAnalysi, 235U Rel . Limi t Pu Rel . Limi t

Da +g gm of Error, % gm of Error, %

2/21/i9 0.85 48.2 44.45 13.7

3/23/79 32.87 10.8 17.11 6.4

4/2/79 35.43 14.8 5.08 13.6

From the table, it is evident that the NDA system used to assay the SNM

scrap cannot, in general, achieve a measurement uncertainty of +10%.

The granting of this request will not affect the safeguarding of the SNM due~,

to the small quantities associated with each scrap item. Additionally, all ,-

scrap material involved is DOE owned and eventually will be returned to a F

DOE owned or a DOE contractor facility. Site security measures guard

against the unauthorized removal of the material. The transportation, via

SST, is arranged and conducted by the DOE / Albuquerque Operations Office.

l9U-235 flDA AflALYSIS Net Net Log Net

2Count Gm. Count Gm. Count Gm. o a

''

2/21/79 Lic2 1c.0 3 . 7 t. 5 1.00c 17 0.01 0.000030 0.005'i*76 L.0 3.661 0.003 1 G.Ou. b.000000 0.000t

33L3 L.0 3.531 0.776 55 1.G93 C.001076 0.0332323 '+ . 0 3.366 0.602 ', 3 0.037 0.00u2G7 0.014o

Calibration , 1062 2.0 3.034 0.301 4 0.002 0.000001 0.001*,

,

Standards 503 1.0 2.702 0.000 p' 1 0.0u0 v.ouo000 0.000127 0.1 2.104 -1.000 $ 2L7 0.233 u.00551o v.079

3 v.GU2 0.Uavuul 6.uvi

360 0.476 0.020263 0.142

- .

N 0.654039 Total U-235, gm-

a u.022239 Sys tematic Error Var. , gm0.019909 Random Error Var. , gm-> ^

Log & Log 8 0.04214a Total Error Var. , gm'

3.167d13474 0.04S33LO271 0.205300 o, gmCK

O0.41 Limit of Error, gm

48.2 Rel. Limit of Error, %

'Log

Pu NDA ANALYSIS Net Net Log Net2

Count Gm. Count Gm. Coun t Gm. o o! ! - 504 1.030 0.01631.2 0.126S427 10.0 3.735 1.000

4195 0.0 3.623 0.903 3172 6.269 0.606274 C.7753005 L.0 3.470 0.778 3432 6.81L C.723356 0.651

3546 7.0S7 0.770532 0.8622067 4.0 3.315 0.602 m

Calibratica ) 200620 3.003 0.301 3 2772 5.432 0.448656 0.670

S tanda rds 476 1.0 2.079 0.000 &# 2721 L.326 0.430714 u.cb672 0.1 1.Eb7 ~1.000 $ 26 0.03d 'O.000081 0.00b6-

2033 1.903 0.053G75 0.230bibd 10.574 1.845645 1.359

'. .

44.451540 Total U-235, gmp. b.265061 Systematic Error Var. , gm

^M 3. 9 c L a,5 t , Random Error Var. , gmsi

Log a Logs.235526 Total Error Var, , gm

O 3.0t8L30404 0.58+05470L02 3.039000 o, gm@

TABLE A-1 . .

6.08 Limit of Error, gi.

13.7 Rel. Limit of Error, %.

'

U-235 NDA ANALYSIS flet fe Log Net2

Count Gm. Coun t Gm. Count Gm. o a3/23/79 9328 12.0 3.970 1.079 4796 6.185 0.301299 0.549

'

..

7995 11.0 3.903 1.041 5561 7.274 0.421459 0.649

7115 10.0 3.852 1.000 8249 11.207 1.039954 1.0205818 8.0 3.765 0.903 6203 8.200 0.540611 0,7?S

mCalibration , 5059 6.0 3.704 0.778 3Standards 3362 4.0 3.527 0.602 V

1654 2.0 3.219 0.301 $782 1.0 2.893 0.000

~

522 0.5 2.718 _0.301114 0.1 2.057 1.000

- .

y 32.866406 Total U-225, gmso 1.168594 Sys tematic Error Var. , gmN- 1.981492 Random Error Var. , gm^

Log a. Log 8 3.150086 Total Error Var. , gmN 3.360653563 0.9124079293 1.774848 0, gmEPO

3.54 Limit of Error, gm

10.8 - Rel. Limit of Error, %

Pu NDA ANALYSIS Net f1 ' Lo g Net2

Count Gm. Count Gm. Count Gm. o a3/23/79 ~ 589 2.622 0.020677 0.1446290 12.0 3.799 1.079 1

6369 11.0 3.804 1.041 2693 4.583 0.063829 0.2535684 10.0 3.755 1.000 3245 5.583 0.095628 0.3094667 8.0 3.669 0.903 2550 4.326 0.056740 0.238m

Calibration 3600 6.0 3.556 0.778 3yS tanda rds 2431 4.0 3.386 0.602 2'

1231 2.0 3.090 0.301 $-

590 1.0 2.771 0.000~ .301317 U.S 2.501 0

77 0.1 1.886 ~1.000< '..

17.1132GB Total U-235, gm0.087972 Sys temati c Error Var. , gm0.212624 , Random Error Var. , gm

LO9 8 LO9 0 0.300s96 Total Error Var. , gm3.221716128 0.9446002588 0.548267 o, gm

TABLE A-2 1.10 Limit of Error, gm

6.4 Rel. Limit of Error, %

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