05000423/LER-1996-015-02, Forwards LER 96-015-02 Re Inadequate Electrical Separation Between Redundant Protection Trains Associated W/Reactor Trip Switches & Reactor Trip Breaker Indicating Lights

Forwards LER 96-015-02 Re Inadequate Electrical Separation Between Redundant Protection Trains Associated W/Reactor Trip Switches & Reactor Trip Breaker Indicating Lights

ML20134M962
Person / Time
Site:	Millstone
Issue date:	11/22/1996
From:	Brothers M NORTHEAST NUCLEAR ENERGY CO., NORTHEAST UTILITIES SERVICE CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20134M965	List: 05000423/LER-1996-015-02, Forwards LER 96-015-02 Re Inadequate Electrical Separation Between Redundant Protection Trains Associated W/Reactor Trip Switches & Reactor Trip Breaker Indicating Lights
References
B15964, NUDOCS 9611260106
Download: ML20134M962 (3)

LER-1996-015, Forwards LER 96-015-02 Re Inadequate Electrical Separation Between Redundant Protection Trains Associated W/Reactor Trip Switches & Reactor Trip Breaker Indicating Lights

Event date:
Report date:
Reporting criterion:	10 CFR 50.73(a)(2)(ii)(B), Unanalyzed Condition 10 CFR 50.73(a)(2)(v), Loss of Safety Function 10 CFR 50.73(a)(2)(vii), Common Cause Inoperability
4231996015R02 - NRC Website

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t g g g gg Mdistone Officcee Hope Ferry Rd., Waterford, CT l

- Utilities System P.o.nox128 Waterford, Cr OGE-0128 (203) 447-1791 November 22,1996 i

l Docket No. 50-423 B15964 Re: 10CFR50.73(a)(2)(ii)(B) 10CFR50.73(a)(2)(v)(D) 10CFR50.73(a)(2)(vii)

U. S. Nuclear Regulatory Commission Document Control Desk Washington, DC 20555 1

This letter forwards Licensee Event Report 96-015-02, documenting a condition that was initia"~ determined at Millstone Unit No. 3 on June 10,1996. This LER l

was initially submitted pursuant to 10CFR50.73(a)(2)(ii)(B). The preceeding

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License Event Report (LER) supplement, submitted on September 5,1996 was submitted pursuant to 10CFR50.73(a)(2)(ii)(B),10CFR50.73(a)(2)(v)(D), and 10CFR50.73(a)(2)(vii).

NNECO's commitments in response to the conditions identified are contained within Attachment 1 to this letter.

Very truly yours, NORTHEAST NUCLEAR ENERGY COMPANY blN l R

M. K Br'others N

Unit Director, Millstone Unit No. 3 CG0010 Attachment: 1)

NNECO's commitments in response to LER 96-015-02 l

2)

LER 96-015-02 g@t I

cc:

H. J.

Miller, Region I Administrator j

A. C. Cerne, Senior Resident Inspector, Millstone Unit No. 3 V. L.

Rooney, NRC Project Manager, Millstone Unit No. 3 W. D. Travers, Dr., Director, Special Projects 9611260106 961122 PDR ADOCK 05000423.

S PDR

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• U.S. Nuclear R:gulatory Commission -

f B15964\\ Attachment 1\\Page 2 i

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The following are NNECO's commitments made within this letter:

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B15964-01:

Maintenance and modifications activities performed internal to L

panels which could potentially impact electrical separation and j

were performed during the period from June 1996 to November j

1996 will be reviewed to ensure compliance with electrical

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separation criteria. This review will be completed prior to May

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31,1997.

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B15964-02:

Identified electrical separation noncompliance's will be corrected l

l prior to entry into mode 4.

l B15964-03:

A training module on electrical separation will be implemented l

as continuing training for applicable personnel from the implementing and Engineering departments. Initial training will be completed by March 31,1997.

i B15964-04:

Applicable work planning process procedures will be revised by January 1,

1997 to incorporate guidance for electrical separation inspection plan development.

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i Docket No. 50-423 B15964'

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Millstone Nuclear Power Station, Unit No. 3 NNECO's commitmer.ts in response to j

Inadeauate Electrical Seoaration Between Redundant Protection l

Trains Associated with Reactor Trio Switches and Reactor Trio Breaker Indicatina Liahts.

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(LER 96-015-02) i i

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November 22,1996 I

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