ML20214G007

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Forwards Markup of Electrical,Instrumentation & Control Sys Branch Ser,Per 860411 Request,Reflecting Util Most Recent Commitment to Modify Containment Sump Water Temp Instrument Loops Per Category 2 Requirements of Reg Guide 1.97
ML20214G007
Person / Time
Site: Vogtle, 05000000
Issue date: 05/02/1986
From: Rossi C
Office of Nuclear Reactor Regulation
To: Mark Miller
Office of Nuclear Reactor Regulation
Shared Package
ML20213F414 List:
References
FOIA-87-213, RTR-REGGD-01.097, RTR-REGGD-1.097 NUDOCS 8605070579
Download: ML20214G007 (2)
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Text

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g 2 1986 MEMORANDUM FOR: M. Miller, Vogtle Project Manager, PWR Project Directorate #4 Division of PWR Licensing-A FROM: C. E. Rossi, Assistant Director for Technical Support Division of PWR Licensing-A .

SUBJECT:

EMERGENCY RESPONSE CAPABILITY - CONFORMANCE T0iR.G. 1.97, ,

REV. 2 -

Plant Name: Vogtle Electric Generating Plant, Unit Nos. I and 2- I Utility: Georgia Power Company Docket Nos.: 50-424/425 Licensing Status: NTOL Resp. Directorate: PD #4/DPA Project Manager: M. Miller Review Branch: EICSB/DPA Review Status: Complete _

i As you requested we are transmitting a marked-up copy of EICSB's safety evalua--

tion report previously transmitted to you by our memorandum dated April 11, 1986. The safety evaluation is marked-up to reflect Georgia Power Company's l j

most recent comitment to modify one containment sump water temperature instru- 1 ment loop in each unit to meet the category 2 requirements in R.G.1.97. We i find their commitment which was made in their April 25, 1986 letter to be l acceptable. 4 C. E. Rossi, Assis' tant Director for Technical Support Division of PWR Licensing-A

Enclosure:

Distribution: i As stated Document Control 016 I ElCSB Rdg cc: D. Crutchfield F. Witt 4Mateymid.(PPMt)#

G. Lainas J. Joyce J. E. Knight B. J. Youngblood A. Udy (EG&G) F. Rosa J H. Walker C. E. Rossi Vogtle S/F Contact.

J. Lazevnick, EICSB/DPA '

X24864 EICSB/DPA SL/EICSB DPA BC/EICS A JLaze n ek:ct JEKnight (E FRosa CERossi <

4/ P /86 4/sv/86 8///86 fM6 0FFICIAL RECORD COPY y ~1

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MEMORANDUM FOR: M. Miller, Vogtle Project Manager, PWR Project Directnrate #4 Division of PWR Licensing-A FROM: C. E. Rossi, Assistant Director 1 Division of PWR Licensing-A

SUBJECT:

EMERGENCY RESPONSE CAPABILITY - CONFORMANCE TD R.G. 1.97, REV. 2 f Plant Name: Vogtle Electric Generating Plant, Unit Nos. 1 and ? ,

Utility: Georgia Power Company l

Docket No.: 50-424/425  !

Licensing Status: _NT0L l Responsible Branch: PD #4/DPA l Project Manager: -

M. Miller Review Branch: EICSB/DPA Review Status: Complete 1 l

We are transmitting herewith our subject safety evaluation with its attachment, EG&G Idaho, Inc., Technical Evaluation Report (TER) dated April 1986. We 3 1

find the instrumentation provided by the Georgia Power Company for meeting the

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recommendations of Regulatory Guide 1.97 acceptable, except for the variable j containment sump water temperature.

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i Our safety evaluation is based on our review of EGAG's TER EGG-EA-6806. This !

completes EICSB's action on this item. 1 l

The EICSB evaluation of licensee performance (SALP input) is also enclosed.

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C. E. Rossi, Assistant Director. 4 Division of PWR Licensing-A j

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l Distribution:

Document Control D16 EICSB Rdg.

cc: (w/ enc.): J. Larevnick (PF)(2)

D. Crutchfield J. E. Knight G. Lainas F. Rosa B. J. Youngblood C. E. Rossi H. Walker Vogtle S/F F. Witt A. tidy (EG8G)

J. Joyce

Contact:

i J. Lazevnick, EICSR/DPA X24864 EICSB/DPA SL/EICSB/DPA BC/EICSB/DPA. A MPA JLazevn c :ct JEKnights/M C'tossi FP.osap7- {

4 8/ 10 /86 43/ to /86 45/ / o /86 48/ ,

4(/86-OFFICIAL RECORD COPY i

. 4 SAFETY EVALUATION REPORT V0GTLE ELECTRIC GENERATING PLANT, UNITS 1 AND 2 DOCKET N05. 50-424/425 CONFORMANCE TO REGULATORY GUIDE 1.97 INTRODUCTION AND

SUMMARY

Georgia Power Company was requested by Generic Letter 82-33 to pro (ide a report to the NRC describing how the oost-accident monitoring instrumentation meets the guidelines of Regulatory Guide 1.97 as applied to emergency response facili-ties. The applicant's response to Regulatory Guide 1.97 was provided by letters dated April 14, 1983, March 15, 1985, June 20, 1985, September 6, 1985 and January 21, 1986.

A detailed review and technical evaluation of the applicant's submittals 'was performed by EG&G Idaho, Inc., under contract to the NRC,'with general'supervi-sinn by the NRC staff. This work was reported by EG&G in the Technical Evalua-tion Report (TER), "Conformance to Regulatory Guide 1.97, Vogtle Electric Gen-erating Plant, Unit Nos. I and 2," dated April 1986 (attached). We have reviewed this report and concur with the conclusion that the applicant either.

confnrms to, or is justified in deviating from, the guidance of Regulatory Guide

> 1.97 for each post-accident monitoring variable except for containment sump water temperature, i

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EVALUATION CRITERIA Subsequent to the issuance of the generic letter, the NRC held regional meetings in February and March 1983 to answer licensee and applicant questions and con- ,

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cerns regarding the NRC policy on Regulat'ory Guide 1.97. . At these meetings, it was established that the NRC review would only address exceptions taken to the guidance of Regulatory Guide 1.97. Further, where licensees or applicants 3

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SAFETY EVALVATION REPORT l._ V0GTLE ELECTRIC GENERATING PLANT, UNITS 1 AND 2 DOCKET NOS. 50-424/425 CONFORMANCE TO REGULATORY GUIDE 1.97 INTRODUCTION AND

SUMMARY

Georgia ' Power Company was requested by Generic Letter 82-33 to pro de a report-to the NRC describing how the post-accident monitoring instrumentation meets the guidelines of Regulatory Guide 1.97 as applied to emergency response facili-ties. The applicant's response to Regulatory Guide 1.97 was provided by letters dated April 14,1983, March' 15,1985, June 20,1985, September 6,1985 and '

l January 21, 1986. 1 i

l A detailed review and technical evaluation of the applicant's submittals was performed by EG&G Idaho, Inc., under contract to the NRC,'with general supervi-  !

l sinn by the NRC staff. This work was reported by EG&G in the Technical Evalua-l tion Report (TER), "Conformance to Regulatory Guide 1.97, Vogtle Electric Gen-

\

erating Plant, Unit Nos. l 'and 2," dated April 1986 (attached). 'We have reviewed this report and concur with the conclusion that the applicant either l

conforms to, or is justified in deviating from, the guidance of Regulatory Guide l 1.97 for each post-accident monitoring variable except for containment sump ,

water temperature, J EVALUATION CRITERIA '

Subsequent to the issuance of the generic letter, the NRC held regional meetings. i

'l in February and March 1983 to answer licensee and applicant questions and con- '

cerns regarding the NRC policy on Regulatory Guide 1.97. At these meetings, it was established that the NRC review would only address l exceptions taken to the guidance of Regulatory Guide 1.97. Further, where licensees or applicants Cmf()/d NAIO

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I explicitly state that instrument systems conform to the provisions of the

.( j regulatory guide, no staff review would be necessary for these items. There- j fore,thereviewperformedandreportedbyEG8Gonlyaddresse[exceptionsto

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the cuidance of Regulatory Guide 1.97. This Safety Evaluation addresses the applicant's submittals based on the review policy described in the NRC regional ,

meetings'and the conclusions of the review as reported by EG&G.

EVALUATION We have reviewed the evaluation performed by EG&G contained in the enclosed TER and concur with its bases and findings. The applicant either conforms to, or has acceptably justified deviations from, the guidance of Regulatory Guide 1.97 for each post-accident monitoring variable except for containment sump water-temperature.

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Regulatory Guide 1.97 recommends that instrumentation be prpvi to on to o ~w=

the containment sump water temperature. Theapplicanth[eprovi # bi.s in-(l 3r strumentation which conformko the R.G.1.97 criteria for Type D, Category 2 variables with the exception that the electrical connections at the instru-  :

WEA C ments and at the penetrations eme no -t qualified for a steam environment. RHD. '

heat exchanger inlet temperature is an alternate variable which can be used to obtain a measure of the sump water temperature during the recirculation phase .:

s of an accident. The applicant however statekthat the RHR inlet temperature '

instruments' are not qualified for the high radiation levels that may be present

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in the heat exchanger rooms. Thus, there & no assurance that either the con-tainment sunp water temperature 's ntation or the RHR heat exohanger in-let temperature instrumentation wsid be available during the course of an accident.

The applicant indicate that the determination of containment emergency sump.

water temperature is not required on the basis that this indication is'not used'

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by the operator to take any type of corrective action, and because the sump temperature would not rise to the point'where the~RHR pump net positive suction head would be inadequate. While the staff agrees.with the applicant that emer '

gency operating procedures do not rely upon measured values of sump water temperature, we believe that this-instrumentation is necessary to provide a quantitative measure of heat removal by way of the containment sump and permit monitoring of the-containment heat removal system operation and effectiveness.

. / / /

Therefore , because there is no assurance that either the ntainmen[ sump water /

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, temperature / instrumentation or the RHR. heat exchanger inlet temperature instru-

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mentation will be available during the course of,an accidedt, we find the appli-l cpit's proposed. e'xemption to the guideline,s RegulatpfyGuide1.97tobe unacceptab.3d j'

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. CONCLUSION ,

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. Based on the staff's' revi of the enclosfd Technical' Evaluation Re / ort and the '

applicant's submittals we find thatdbe Vogtle Electric. Genera ng P1 ant,junit j - / / _

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Nos. I a d'2,'desion is acceptable with respect o conformance to Regu1'atory Gui 1.97, Revision 2 with the ,/

xception o? the contaihment sump s -

(ater emperaturef

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I t' s the staff's position that'i.nstrumentation be~provided for the containment- '

sump water temperature variable' that is entirely environmentally qualified in.- H l /

- accordance'bith the provis)fns of 10 CFR 50.49 and Regulatory Guide 137 and j

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that t be' operational rior to receiving a full power. license. 1

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