ML20028A390
| ML20028A390 | |
| Person / Time | |
|---|---|
| Issue date: | 11/09/1982 |
| From: | Thomas C Office of Nuclear Reactor Regulation |
| To: | Rahe E WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP. |
| References | |
| NUDOCS 8211190365 | |
| Download: ML20028A390 (2) | |
Text
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,, n NOV 9 1982 DISIRIBtWI
_C6itral Files NRC PDR PRC NSIC Westinghouse Electric C;rporation JBerggren PAnderson ATTil: Mr. E. P. Rahe, Manager C0 Thomas Nuclear Safety Department P. O. Box 355 FMiraglia 289'*^ d '?
f Pittsburgh, Pennsylvania 15230 65 %
Dear Mr. Rahe:
Subject:
Request flumber 1 for Additional Information on WCAP-9863(P)
We are currently reviewing Westinghouse Electric Corporation licensing i
topical report WCAP-9863(P) entitled " Rod Bank Worth Measurements Utilizing l
Bank Exchange."
The initial review reveals the need for the additional information indicated in the enclosure.
This information is necessary to complete the review - its expeditious sub-mittal will, therefore, be to Westinghouse's advantage. Please advise us, as soon as possible, of your planned submittal date to pemit us to develop a review schedule.
The reporting and/or recordkeeping requirements contained in this letter affect fewer than ten respondents; therefore, OMB clearance is not required under P. L.96-511.
Sincerely, Cecil 0.
homas, Acting Chief Stan ardization and Special Projects Branch Division of Licensing
Enclosure:
As stated ta: Mr. Bruce Lorenz N
Westinghouse Electric Corp.
M fluclear Safety Department 0/9
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P. O. Box 355 Pittsburgh, Pennsylvania 15230 8211190365 821109 PDR TOPRP EMVWEST C
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NOV 4 1982 QUESTIONS FOR WCAP-9863 1.
Demonstrate, by either analytical neans or a numerical example, that the Rod Swap Methodology (RSM) is capable of discerning an error in a test bank prediction (T ), assuming a correct measure-p ment (T ), in terms of the ratio (T, - T )/T.
Provide suitable m
p p
examples, for errors in T of 110%, 115%, and 20%, for reference p
bank prediction (R ) and measurement (R ) differences of 0%,15%,
p m
and 110% in the ratio (R, - R )/R.
p p
2.
Demonstrate, by either analytical means or a numerical example, that' RSM is capable of discerning an error in a test bank measurement (T ) in tenns of the ratio (T - T )/T. Provide suitable examples, m
m p
p for errors in T f 10%,
15%, and 20%, for reference bank values m
of 0%,
15%, and 10% in the ratio (R - R )/R ).
m p
p 3.
For a difference in (T - T )/T for a test bank, estimate the m
p p
- contribution to the difference by a difference in (R
-R )/R for m
p p
the reference bank.
How does this contribution vary for different worth banks? How does this contribution vary with the location
,of a control bank? How does this contribution vary for banks with various a values?
4.
Given that the reference bank difference (R - R )/R is 10%,
m p
p what percent difference would you expect the test bank difference (T - T )/T.to be, assuming that the test bank was correctly m
p p
predicted? How do factors such as bank worth, location, and a values influence this?
5.
Given that the reference bank difference (R - R )/R is +10% and p
p the test bank difference (T - T )/T is -15%, what is the true m
p p
difference between T and T i p
m