05000336/LER-1993-023-02, Forwards LER 93-023-02,documenting Event Occurred at Unit 2 on 930622.Commitments Made within Ltr Listed

Forwards LER 93-023-02,documenting Event Occurred at Unit 2 on 930622.Commitments Made within Ltr Listed

ML20141C457
Person / Time
Site:	Millstone
Issue date:	06/17/1997
From:	Price J NORTHEAST NUCLEAR ENERGY CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20141C462	List: 05000336/LER-1993-023-02, Forwards LER 93-023-02,documenting Event Occurred at Unit 2 on 930622.Commitments Made within Ltr Listed
References
B16272, NUDOCS 9706250234
Download: ML20141C457 (2)

LER-1993-023, Forwards LER 93-023-02,documenting Event Occurred at Unit 2 on 930622.Commitments Made within Ltr Listed

Event date:
Report date:
Reporting criterion:	10 CFR 50.73(a)(2)(ii)(B), Unanalyzed Condition 10 CFR 50.73(a)(2)(vii), Common Cause Inoperability
3361993023R02 - NRC Website

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n,ioor Nocicar power siasm Northeast Nuclear Energy Company P.O. Hot 128 Waterford, Ur OM85-0128 (860) 447-1791 Fax (860) 444-4277 The Northeast Utilities System June 17,1997 Docket No. 50-336 816272 Re: 10 CFR 50.73(a)(2)(ii)(B) 10 CFR 50.73(a)(2)(vii)(C)

U.S. Nuclear Regulatory Commission Document Control Desk Washington, DC 20555 This letter forwards Licensee Event Report (LER) 93-023-02, documenting an event that occurred at Millstone Nuclear Power Station, Unit 2 on June 22,1993. This LER is being submitted pursuant to 10 CFR 50.73(a)(2)(ii)(B) and 10 CFR 50.73(a)(2)(vii)(C).

This LER supplement provdes an update on the analyses and investigation of this event.

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

B16272-01:

Appropriate procedures shall be revised prior to entry into Mode 4 from the current outage to ensure that proper valve control parameters (benchset, air regulator, and stroke length) are specified and verified

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after any maintenance activities are performed that could affect dual I

function valve closing forces. (This commitment was previously sent to the NRC in LER 336/97-011-00 NNECO Commitment No. B16372-01.)

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U. S. Nucl:ar Regulatory Commission B16272/Page 2 B16272-02:

The affected valves will be adjusted to ensure they properly close against containment design pressure and normal operating system pressure, and they will be tested to ensure Appendix J, Type C leakage rate testing criteria are met. These activities will be performed prior to entry into Mode 4 from the current outage. (This commitment was previously sent to the NRC in LER 336/97-011-00, NNECO Commitment No. B16372-02.)

Very truly yours, NORTHEAST NUCLEAR ENERGY COMPANY J. A. Pri e Direct 6 - Millstone Unit 2 l

Attachment: LER 93-023-02 cc:

W. D. Travers, Director of Special Projects H. J. Miller. Pegion I Administrator D. P. Beau:.x Senior Resident inspector, Millstone Unit 2 D. G. Mcdonald, Jr., NRC Senior Project Manager, Millstone Unit 2 i

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