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Discusses Status of Review of Licensee Responses to IE Bulletin 79-01 Re Environ Qualification of Electrical Equipment.Listing of 24 Licensee Notifications & 790606 Lainas Memo Encl
	ML20136C282
Person / Time
Site:	Hatch, Browns Ferry
Issue date:	06/28/1979
From:	Lainas G; Office of Nuclear Reactor Regulation
To:	Grimes B; Office of Nuclear Reactor Regulation
Shared Package
ML20136C288	List: ML20136C282; ML20136C291;
References
	NUDOCS 7909190029
	Download: ML20136C282 (7)
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f d a UNITED STATES NUCLEAR REGULATORY COMMISSION r, y usumarow o.c.zoses

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JUR 2 8 579 MEMORANDUM FOR: B. Grimes, Assistant Director for Systems and Engineering, Division of Operating Reacton FRON: G. Lainas, Chief. Plant Systems Branch, Division of Operating Reactors

SUBJECT:

STATUS OF PS8 REVIEWS IN CONNECTION WITH LICENSEE'k,~ -

RESPONSES TD IE BULLETIN 79-01 IE Bulletin 79-01 requirs that all licensees review the environmental qualification of electrical equipment installed in their plants and report the results to the NRC within 120 days of receipt of the Bulletin.

The bulletin further requires that any itess of equipment found to be unqualified must be reported to the Directer of the Division of Operating Reactors within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months . If plant operation .is to continue with the unqualified equipment, a safety basis must be included in the 24 hour2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months report. The purpose of this memorandum is to provide you with the status of our reviews in connection with the 24 hour2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months notifications nceived to date.

There have been 19 separate reports of equipment which the licensees believe may not be qualified to perfors its safety function in an accident environment. Each of these reports was reviewed by PSB and a detenninstion was made as to wMther the proposed resolution, including the bases for continued operation, where appropriate, was acceptable.

These determinations were made in consultation with the D0R Project Managers and where necessary additional information was requested via telephone and telecopy from the licensees. A suunary of the status of all these reviews is provided in Enclosure 1.

With the exception of item 4 of Enclosure 1, all our reviews are complete and we have achieved a satisfactory resolution with the licensees. In the case of item 4 (stem mounted limit switches on MSIV's at Browns Ferry Units 1, 2 & 3) TVA does not propose to replace the unqualified limit switches. While we do not believe that there is any innediate hazard to the health and safety of the public we do believe that several conditions must be satisfied if the switches are not replaced. These conditions are set forth in our memorandum to T. Ippolito dated June 6,1979 (see Enclosure 2).

7909190

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2 As the licensee reviews mquired in connection with IE Bulletin 79-01 continue, we expect to receive additional reports of equipment considend to be unqualified for its accident environment. We will evaluate these reports imediately and update Enclosum 1 at appropriate intervals.

G. Lainas, Chief Plant Systens Branch Division of Operating Reactors

Contact:

E. Butcher, X28077 Enclosums:

As stated .

cc w/ enclosure:

D. Eisenhut S. Hanauer '

G. Lainas R. Satterfield V. Moore V. Thomas D. Tondi E. Butcher 00R Branch Chiefs PS8 Section A DDR AD's E. Jordan 1

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ML20136C282

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