ML19332A443

Submits Info Re Status of Evaluation & Mods of Diesel Generator Status Annunciator Sys.Licensee Should Verify That Annunciators Located in Control Room.Diesel Generator Output Breaker Should Be Annunciated in Control Room

ML19332A443
Person / Time
Site:	Kewaunee
Issue date:	09/09/1980
From:	Epps R LAWRENCE LIVERMORE NATIONAL LABORATORY
To:	Shemanski P Office of Nuclear Reactor Regulation
References
RE-80-09-09, RE-80-9-9, NUDOCS 8009150512
Download: ML19332A443 (2)

Text

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.cp LA\NRENCE LIVERMORE LABCRATORY q

September 9, 1980 .

RE 80-09-09 Mr. Paul Shemanski, Operating Reactors Assessment Branch

, Division of Licensing U.S. Nuclear Regulatory Commission Washington, D.C. 20555

SUBJECT:

KEWAUNEE NUCLEAR POWER PLANT - DOCKET NO. 50-305, DIESEL GENERATOR STATUS ANNUNCIATORS (TAC 07896)

REFERENCES:

1. NRC letter dated March 29, 1977 to Wisconsin Public Service Corporation (WPSC)

2. WPSC Letter dated June 9, 1977 to NRC

3. LLL Report, UCID-18145,'" STATUS OF EVALUATION AND .

MODIFICATIONS OF DIESEL GENERATOR STATUS ANNUNCIATOR SYSTEMS AT VARIOUS U.S. NUCLEAR POWER PLANTS," October 1979

4. WPSC LER 79-002/0lX-1 dated March 22, 1979 In their letter [Ref.1], the NRC requested that WPSC provide information on the status annunciator system for the diesel generators at their facility.

This request for information was prompted by reports from licensees, i.e ,-

LER's on incidents where diesel generators failed to respond to automatic start signals because control switches or lockout and shutdown relays were left in the. shutdown condition by operators unaware of their status.

The principal reasons for this lack of awareness were:

1. The sharing' of annunciator stations for both disabling ano non-disaoling alarm conditions,

2. wording.on annunciator-windows for disabling conoitions which j did not specifically say a diesel generator emergency start.

was blocked,.

-3. dis,oling conditions which were not annunciated in.the Co' trol Room.

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(The licensee.responaed by letter [Ref.-2],.cescribing the ciesel generator

' annunciator system at the Kewaunee Nuclear Power Station. A review of the-

-licensee's response and the LLL report [Ref. 3) has identified two areas of concern. These areas are:

l. . -It is 'not clear from the licensee's response that :all of -the annunciators required by the NRC criteria are located in the- ,

-control room..

2. J As noted in WPSC'LER cated March 22, 1979 [Ref._4], automatic closure of.the diesel-generator output breaker will not occur if the switch islin the manual position.

In order to provide the operator with accurate, complete and timely >

information pertinent to the status of the diesel generators, as required by

-IEEE Std. 279-1971 and NRC~1etter dated March 29, 1977,.the following actions should be taken:

1. The licensee s' .ild be contacted to verify that annunciators that are requir' ' to be in the control room are not located in an axuiliarv .ontrol console at a remote location.The results of this inquiry shoulo be documented.

2. Condition of the diesel generator output breaker shoulo be annunciated in the' control room.

It_is rocommended that the. licensee be' informed of the above requirement and that corrective action be implemented.

RICHARD C. EPPS.

Special. Issues Program Nuclear Systems Safety Program RCE:el Copy to:

M.H. Dittmore R.A. Victor