ML18081A447
| ML18081A447 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 10/18/1979 |
| From: | Parr O Office of Nuclear Reactor Regulation |
| To: | Mittl R Public Service Enterprise Group |
| References | |
| NUDOCS 7910310046 | |
| Download: ML18081A447 (4) | |
Text
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DISTRIBUTION: '
NRC PDR RDenise ELD
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Local PDR
-Docket F~ 1 e[:(
LWR #3 File DVassallo OCT 1 8 1979 DRoss bee:
.JBuchanan, NStC TAbernathy, TIC ACRS (16)
Docket No: 50-311 Mr.-R. L *.. Mittl, General Manager Licensing and Environment Engineering and Construction Department
_Public Service Electric and Gas Company.
80 Park Pl ace
_Newark, New Jersey 07101 *
Dear _Mr. Mitt l :
SVarga *
- F!rJi 11 i ams OParr ADromeri ck MRushbrook (w/extra cop_i es)
RMattson SHanauer JK'ni ght RTe<;ies.co RDeYot,rng VMoore MErnst SUBJ_ECT:
ENVIRONMENTAL QUALIFICATION_ OF REACTOR 'COOLANT TEMPERATUR.E DETECTORS AND CONTAINMENT PRESSURE TRANSMI.TTERS
-The 'environmental qualification for certain VJestinghouse-suppl.ied instrumel')tation is.9escribed in WCAP-91~7 11 EnvironfT!ental Qualification of Safety-Related Class IE Process Instrumenta't;ia*n.
11 Your appl icatfon for a license to op_erate_the _
Salem_ Plant references WCJ\\P~9157 as a basis for the acceptance of the environ-:
mental qualification of this instrumentation. The regulatory staff -has found t_hat additienal information-is needed to complete its review of _ltJCAP-9157.
L~estingho*use Electric Corporation has agreed to, provide the requested information in a timely manner ~xcept for three areas:_ (1) the qualified life.of resistance temperature detectors (RTDs) to be used to measure the temperature of reactor coolant; (2) qualification of field connections for these temperatur~ detectors;-
{3_) qualification of remote bellm-1s sensing pr-essure tr_ansmitters to be used to measur*e pressure of the containment atmosphere.
Acceptable tnformatio_n for these three areas must be.provided for our review and approval prior to the issuance of a license_ to operate your planL Since resolution of these matters may not be completed with Westinghouse within the remaining J icensi ng review schedule.
estimated for your pl an~, we wi 11 require that re solution of the staff's 'concerns stated bel o\\'; be completed on your appl icati 1on.
The ~Jestinghouse evaluation of the qualified life of the resistance temperature detectors-(Section 2.2 of VJCAP-9157) is unacceptable because ~he assumed post-accident fission product source term is too smal 1 and the assumed post-accident operating time is *too short. Guidelines for calculating acceptable qualified life in a radi~tion environment follow.*
A.
The total in~egrated exposure to be simulated in qualification tests should be the sum of the calculated integrated exposure dud ng normal pl ant opera~
tion a~d the cal'culated integrated exposure during post-accident plantW.
operat10n.
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Mr
- R. L. fvii tt l 2 -
OCT.: 8 1979.
C.
Post-accident exposure for RTDs should be based 011 the higher of ti.-10 exposures calculated by assuming (1) an instantaneous release of fission products from the fuel to the containment atmosphere, and (2) an instantaneous release from
- the fuel to the reactor coolant without subsequent release to the cont~inment.
O.
Post-accident operation time for the narrow-range resistance temperature detectors should be the sum of the longest time required for reactor trip in any anticipated operation~l occurrence or design basis accident plus a margin of one hour for uncertainties in predicting the time.
E.
Post-accident operation time.for the wide-1"ange resistance temperature detectors should' consider the environm-ental conditions for an interval of 106 days following* the-accident., unless a shorter time can be justified. *
(Since the post-accident operation time used in qualification tests described in ~JCAP-9157 is less than 1_00 days, you should provide justification to sho~v
- that extending the test to 100 days would not significantly affect instrument performance or accuracy. for this period).
WCAP-9157 does not include qualification of elect~ical connections used in the installation of resistance ternperature detectors because these field connections are -not made by l~estinghouse. Justification for your conclusion-that field connections t-Ji11 perform acceptably in tile post-accident environment is needed.
Th~ qualification test of the remote bellO\\'JS sensing.pressure transmitte~ res~1lted in an anomalous pressure sp.ike above the test chamber r:iressure (Section 6-6 of HCAP-9157).
The test results are unacceptab1 e to the staff because the indicated pressure does,not meet the acceptance criteria for instrument accuracy and anomalous indications> such as the pressure spike; are contrary to the requirements of Section 4 of IEEE-279-1971 >
11 IEEE Criteria for Protect ion Systems for Nuclear Power Genera-
-ting Stations.
11 It js concluded in VJCAP-9157 that this-pressure spike is attribut-ab*I e to the smallness of the test chamber and that the spike \\'JOul d not occur in the large containment.
The discussion in l~CAP-9157 of the cause of the pressure spik.e in the test and the assuranc~ of its absence in the plant is inadequate.
Additional tests or analyses are needed to demonstrate that this pressure transmitter is acceptable.
Pl ease amend your application to provide,the foll mvi ng additional information.
- 1. Results of.calculations using the guidelines in this letter to detemine acceptable qualified life of resistance temperature detectors to be used to measure reactor cool ant temperature.
- 2.
Results of tests o~ analyses to demonstrate acceptable environmental qualifi6ati
- of fie 1 d connections -for resistance* teinperature detectors to be used to measure reactor cool ant temperature *
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DATii:~
t:. u.e. GOVl!RNMltNT Pf;INTING Ol"fl'ICe:: 1978.. 261 - '760
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~1r. R. L. Mitt1 3
OCT 1 8 1979 3e Results of tests or analyses, in addition to those in ~~CAP-9157, to demonstrate acceptable environmental qualification of pressute transmitters to be used to measure containment pressure.
TI1 is information is needed by October 25 in order to meet *our schedule for review and approva1 ofjour application for an operating license. If you canno.t meet this ctate, please inform us within"two 1t1eeks from the date of receipt of this letter of a date you I/Jill submit the requested information. If you desire* clari-fication of the technical information requested in this letter please call Tom Dunning on (301) 492-7383'.
cc:
See next page 0P'P'ICE~
DATE~
Sincerely, Original c;j_;ned by A. w. Dromeri.o~,
Olan D~ P~rr, Chief Light hfoter *Reactors Branch No. 3 Division of* Project Managsment u.a. GovmRNMCNT PPrtNTtNG OP"P'ICPZ: 1970 - 265
- 101
Mr. R. L. Mittl, General Manager cc :
R i ch a rd Fry 1 i n g, J r *, Es q
- Assistant General Counsel Public Service Electric & Gas Company 80 Park Pl ace Newark, New Jersey 07100 Mark Wetterhahn, Esq.
Conner, Moore & Cciber i747.Pennsylvania Avenue, N.W.
Suite 1050 Washington, D.C.
20006 Mr. Leif J. Norrholm U. S. NucJear Regulatory Commission Region I Drawer I Hancocks Bridge, New Jersey 08038
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