ML16340A670

Requests Addl Info to Complete Environ Review Re OL Application.Includes Info Re Reactor Coolant Temp Detectors & Containment Pressure Transmitters

ML16340A670
Person / Time
Site:	Diablo Canyon
Issue date:	11/08/1979
From:	Stolz J Office of Nuclear Reactor Regulation
To:	Morrissey J PACIFIC GAS & ELECTRIC CO.
References
NUDOCS 7911300173
Download: ML16340A670 (10)

Text

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J.

R. Buchanan, NSIC T.

B. Abernathy, TIC ACRS (16) 4e

". Docket Files, ELD NRC PDR IE (3)

Local PDR R. Satterfield 7<

LHR 1 File D. Crutchfield NOV 8

19 D. Vassallo D.

Ross F. J. Williams S.

Varga J. Stolz Docket Nos. 50-275 J

B. Buckley and 5Q-323 4-E. Hylton R. J. Mattson S.

Hanauer Mr. John C. Morrissey J

~

P. Knight Vice President 8 General Counsel R. Tedesco o

Pacific Gas' Electric Company

'R.,DeYoung 77 Beale Street V. Moore San Fr ancisco,'a'lifornia 94106

~

H.

Krcger

'. L. Ernst Dear Nr.

Morrissey:

R.

P.

Denise R. Hartfield

SUBJECT:

ZNVIROtNENTAL QUALIFICATION OF REACTOR COOLANT TEMPERATURE DETECTORS AND CONTAIMf'ENT PRESSURE TRANSMITTERS (DIABLO CANYON NUCLEAR POi4ER STATION,)

The environmental qualification for certain Westinghouse-supplied instrumentation is described in NCAP-'9157 "Environment'al gualification of Safety-Related Class IE Process Instrumentation."

Your application for a license to operate the Diablo Canyon Nuclear Power Station references t<CAP-9157 as a basis for the acceptance of the environmental qualification of this instrumentation.

The regulatory staff has found that additional information is needed to complete its review of RCAP-9157.

l/estinghouse.Electric Corporation has agreed to provide the requested information in a timely manner except 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 temperature detectors;

{3 ) qualification of remote bellows sensing pressure transmitters to be used to measure pressure oi: t'e containment.atmosphere.-

Acceptable information for these three areas must be provided for our review and approval prior to the issuance of a license to operate your plant.

Since resolution of these matters m~ not be completed with Westinghouse within the remaining licensing review schedule estimated for your, plant, we will require that resolution of the staff's concerns stated below be comp1eted on your

,application.

The Westinghouse evaluation of the qualified life of the resistance temperature detectors (Section 2.2 of HCAP-9157) is unacceptable because the assumed post-accident fission product source term is too small and the assumed post-accident operating time is too short.

Guidelines for calculating acceptable qualified life in a radiation environment follow.

A.

The total integrated exposure to be simulated in qualification tests should be the sum of the calculated integrated exposure during normal plant opera-l~

tion and the calculated integrated exposure during post-accident plant C7P'retc W

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Hr. John C. r'lorrissey NOV 8 1979 C.

Post-accident exposure for RTDs should be based on the higher of two-exposures calculated by assuming (I) an instantaneous release of fission products from the fuel to the containment. atmosphere, and (2) an instantaneous release from the fuel to the i eactor coolant without subsequent release to the containment.

D.

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 operational 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-range resistance temperature detectors should consider the environmental conditions for an interval of 100 days following the, accident, unless a shorter time can be justified.

(Since the post-accident operation time used in qualification tests described in WCAP-9157 is less thorn 100 days, you should provide justification to show that extending the test to 100 days Mould not significantly affect instrument perfomance or accuracy for this period).

RECAP-9157 does not include qualification of electrical connections used in the installation of resistance temperature detectors because tHese field connections are not made by Westinghouse.

Justification for your conclusion that field connections wiII perform acceptably in the post-acqident environment is needed.

The qualification test of the remote beIIo><s sensing pressur e transmitter resulted

'n an anomalous pressure spike above the test chamber pressure (Section 6-6 of llCAP-9157).

The test results are unacceptable 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, NIEEE Criteria for Protection SystemIs for NucIear Power Genera-ting Stations."

It is concluded in HCAP-9157 that this pressure spike is attribut-able to the smallnes's'of the test chamber and that the spike

<~ould not occur in the large containment.

The discussion in MCAP-9157 of the'cause of the pressure spike in the test and the assurance of its absence in the plant is inadequate.

Additional tests or analyses are needed to demonstrate that this pressure transmitter is acceptable.

Please amend your application to provide the following additional information.

l.

Results of calculations using the guidelines in this letter to determine acceptable qualified life of resistance temperature detectors to be used to measure reactor coolant temperature.

2.

Results of tests or analyses to demonstrate acceptable environmental qualificatio of field connections for resistance temperature detectors to be used to measure reactor coolant temperature.

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Nr. John C. Horr,issey 3

NOV 8

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3.

Results of tests or analyses, in addition to those in MNP-9157, to demonstrate

'ccep environmental qualification of pressure transmitters to.be used to

'easure containment pressure.

This information is needed by:December

.'10, 1979 in order 'to meet our schedule for review and approval of your application for an operating I.icense.

If you cannot meet this date, please inform us within two weeks from the date of'eceipt of this letter of a date you will submit the requested information. If you desire clarificati'on of the technical information requested in this letter please.

- call TmI Dunning on (301).492-7383.

I 1

Sincerely, Original Signed hy

'ohn P. Stolz John'F. Stolz, Chief L'ight Mater Reactors Branch Ho.

1 Division of Project Hanagement' CC:

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Mr. John C ~ Horrissey cc:

Philip A. Crane, Jr.,

Esq.

Pacific Gas

& Electric Company 77 Beale Street San Francisco, California 94106 Janice E. Kerr, Esq.

California Public Utilities Commission 350 HcAllister Street San Francisco, California 94102 Mr. Frederick Eissler, President Scenic Shoreline Preservation Conference, Inc.

4623 More Mesa Drive Santa

Barbara, California 93105 Ms. Elizabeth E. Apfelberg 1415 Cazadero San Luis Obispo, California 93401 Hs.

Sandra A. Silver 1760 Alisal Street San Luis Obispo, California 93401 Mr. Gordon A. Silver 1760 Alisal Street San Luis Obispo, California 93401 Paul C. Valentine, Esq.

321 Lytton Avenue Palo Alto, California 94302 Yale I. Jones, Esq.

19th Floor 100 Van Ness Avenue San Francisco, California 94102 Mr. Richard Hubbard

, HHB Technical Associates Suite K

1723 Hamilton Avenue San Jose, California 95125 Mr. John Harrs Managing Editor San Luis Obispo County Telegram - Tribune 1321 Johnson Avenue P.

0.

Box 112 San Luis Obispo, California 93406 Elizabeth S.

Bowers, Esq.,

Chairman Atomic Safety

& Licensing Board U.

S. Nuclear Regulatory Commission Washington, D.

C.

20555 Mr, Glenn 0. Bright Atomic Safety

& Licensing Board U ~

S. Nuclear Regulatory Commission Washington, D.

C.

20555 Tolbert Young P.

0.

Box 219 Avila Beach, California 93424 Richard S.

Salzman, Esq.,

Chairman Atomic Safety

& Licensing Appeal Board U. S. Nuclear Regulatory Commission Washington, D.

C.

20555 Dr.

W., Reed Johnson Atomic Safety 8 Licensing Appeal Board U.

S. Nuclear Regulatory Commission Washington, D.

C.

20555 Alan S. Rosenthal, Esq.

Atomic Safety

& Licensing Appeal Borad U.

S. Nuclear Regulatory Commission Washington, D.

C.

20555 Ms.

Raye Fleming 1920 Mattie Road Shell Beach, California 93440 Brent Rushforth, Esq.

Center for Law in the Public Interest 10203 Santa Monica Boulevard Los Angeles, California 90067 Arthur B. Gehr, Esq.

Snell 8 Wilmer 3100 Valley Center

Phoenix, Arizona 85073

>Mr. James

0. Schuyler, Nuclear Projects Engineer Pacific Gas

& Electric Company 77 Beale Street San Francisco,.California

.94106

Hr. John C. Horrissey cc:

Bruce Norton, Esq.

3216 North 3rd Street Suite 202 Phoenix, Arizona 85012 Hr.

W.

C. Gangloff Westinghouse Electric Corporation P.

0.

Box 355 Pittsburgh, Pennsylvania 15230 Hichael R. Klein, Esq.

Wilmer, Cutler 8 Pickering 1666 K Street, N.

W.

Washington, D.

C.

20006 David F. Fleischaker, Esq.

Suite 709 1735 Eye Street, N.

W.

Washington, D.

C.

20006 Dr. William E. Hartin Senior Ecologist Battel.le Hemorial Institute

Columbus, Ohio 43201 M. Andrew Baldwin, Esq.

124 Spear Street San Francisco, California 94j05

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