ML20133C495

Summary of 851002 Meeting W/Util Re Use of Feed & Bleed Core Cooling in Lieu of Qualifying Equipment Outside Containment.Suppl to Safety Evaluation & Schwencer Forwarding Amend 16 to License DPR-61 Encl

ML20133C495
Person / Time
Site:	Haddam Neck File:Connecticut Yankee Atomic Power Co icon.png
Issue date:	10/04/1985
From:	Frank Akstulewicz Office of Nuclear Reactor Regulation
To:	Zwolinski J Office of Nuclear Reactor Regulation
Shared Package
ML20133C497	List: ML20133C495 ML20133C525 ML20133C527 ML20133C533
References
NUDOCS 8510070379
Download: ML20133C495 (2)

Text

e October 4, 1985 Docket No. 50-213 MEMORANDUM F0P,: John A. Zwolinski, Chief Operating Reactors Branch #5, DL FROM: Francis M. Akstulewicz, Project Manager Operating Reactors Branch #5, DL

SUMMARY

OF OCTOBER 2, 1985 MEETING WITH NOPTHEAST UTILITIES Re: Use of Feed and Bleed in the Licensing Basis for the Haddam Neck Plant On October 2,1985, the staff and representatives of Northeast Utilities (NU) net to discuss issues related to envircreental qualification of equipment outside containment. In particular, we met to discuss the use of " feed and bleed" core cooling in lieu of qualifying equipnent outside containment.

By letter dated September 30,1985 (Attachment 1) the staff informed NU that NU could not use " feed and bleed" as a permanent solution to environmental qualification of equirrent outside containment. During this meeting, NU took exception to the staff letter and, in particular, stated that feed and bleed was reviewed as part of the licensing basis for the Haddam Neck Plant. NU distributed copies of docurrents to support their position (Attachment 2).

Given this additional information, the staff is reevaluating our understanding of the licensing basis for the Haddam Neck Plant and the use of " feed and bleed" core cooling in lieu of qualification of equipment outside containment. Our conclusions on this matter will be the subject of future correspondence with NU. The licensee also received our letter dated October 2,1985 regarding the licensees requested exemption to 50.71. The bases for our decision criteria was discussed with the utility and e subsecuent exemption request satisfying our criteria will be forthcoming.

Original sisned WS h

p Francis M. Akstulewicz, Proj.ect Manager Operating Peactors Branch #5, DL

Enclosure:

As stated DISTRIBUTION Docket CJanerson NRC PDR 0 ELD Local PDR EJordan ORB #5 Rdg BGrimes JZwolinski ACRS (10)

FAkstulewicz NRC Participants DL:0RB#5HM, FAkstulewil:7:0g DL:0RB#5T JZwolinski 53#l c g)/ f /85 io/4 /85 gI O O

s D, Connecticut Yankee Atonic Power Company Haddam Neck Plant cc:

Gerald Garfield, Esquire Kevin McCarthy, Director Day, Berry & Howard Radiation Control Unit Counselors at Lav Department of Environnental City Place Protection Hartford, Connecticut 06103-3499 State Office Building Hartford, Connecticut 06106 Superintendent Haddam Neck Plant John F. Opeka, Senior Vice RDF #1 President Post Office Box 127E f!uclear Engineering and Operations East Hampton, Connecticut 06424 Connecticut Yankee Atomic Power Company Edward J. Mroczka Post Office Box 270 Vice President, Nuclear Operations Hartford, Connecticut 06141-0270 Northeast Utilities Service Company Post Office Box 270 Hartford, Connecticut 06141-0270 Board of Selectren Town Hall -

Haddam, Connecticut 06103 ,

State of Connecticut Office of Pnlicy and Management ATTN: Under Secretary Energy Division 80 Washington Street Hartford, Connecticut 06106 Resident Inspector Haddan Heck Nuclear Power Station c/o U.S. NRC East Haddam Post Office East Haddam, Connecticut 06423 v - Regional Administrator, Region I ll.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, Pennsylvania 10406

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, , ., carg l 8 ko UNITED STATES NUCLEAR REGULATORY COMMISSION

$ ;j WASHINGTON, D. C. 20555

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SEP 3 0 e"., e Docket No. 50-213 ,_

l Mr. John F. Opeka, Senior Vice President l Nuclear Engineering and Operations Connecticut Yankee Atomic Power Company Post Office Box 270 Hartford, Connecticut 06141 4

SUBJECT:

ENVIRONMENTAL QUALIFICATION OF EQUIPMENT OUTSIDE CONTAINMENT Re: Haddam Neck Plant F Connecticut Yankee Atomic Power Company (CYAPCo) was required to have the Haddam Neck Plant in conformance with the EQ rule by the end of the second outage after March 31, 1982. Your position is that in starting up after the August 1984 outage you were in conformance with the EQ rule for equipment locatied outside the containment. This position was based upon the use of the

" feed and bleed" core cooling method following a high energy line break outside of containment in lieu of qualifying equipment important to safety located outside containment.

_.}In our effort to issue the final safety evaluation report on environmental qualification for Haddam Neck, we have considered your proposed use of " feed and bleed" core cooling in response to high energy line breaks outside conta.inment in lieu of qualification of a large amount of equipment outside conthinment. The staff has concluded that the use of " feed and bleed" as a permanent alternative to qualification of electrical equipment important to 4

safety is not acceptable.

Our current understanding of the licensing bases for Haddam Neck does not include the use of " feed and bleed" as a method of mitigating the consequences of design basis accidents. Therefore, consistent with the requirements of 10 CFR 50.49, it is the staff's position that the systems identified by the licensee as necessary to mitigate the consequences of design basis accidents, including high energy line breaks outside containment, should be qualified to the environments in which the systems would be required to function.

1

Mr. John F. Opeka - 2-We emphasize that the use of " feed and bleed" has never been approved by the NRC as the primary means of mitigating any design basis accidents, To this end, substantial additional analysis would be needed to support the~CYAPCo position and, in all likelihood, a Commission policy decision made concerning the overall approach.

In light of the information presented above, the staff now requires that a justification for continued operation be submitted immediately. Note that the staff has accepted, for other facilities, the limited use of " feed and bleed" in support of such a justification.

Sincerely.

Hg L. Thompso , J~. Director '

D sion of Licens

- Office of Nuclear eactor Regulation .

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NRC ACCEPTANCE OF FEED AND BLEED

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! DECEMBER 27,~1974 SER SUPPORTING FTOL ISSUANCE O JULY 14, 1977 SER SUPPORTING AMENDMENT lE 0

NOVEMBER 9, 1982 SER RESOLVING AFW POWER SOURCE DIVERSITY ISSUE 3

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