ML20058L055

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Forwards Eight LERs Re Failure of Containment Isolation Valves to Meet Leak Tightness Criteria
ML20058L055
Person / Time
Site: Monticello Xcel Energy icon.png
Issue date: 11/11/1975
From: Mayer L
NORTHERN STATES POWER CO.
To: Boyd R
Office of Nuclear Reactor Regulation
Shared Package
ML20058L058 List:
References
NUDOCS 9105070370
Download: ML20058L055 (1)


Text

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NSF NORTHERN STATES POWER COMPANY M IN N E A PO LI S. M 8 N N E S OTA B 5 4 01 November 11, 1975 e .

t; .sn-- ku 'A O .,c Mr. R. S. Boyd, Acting Director ,.

Division of Reactor Licensing 1; A U. S. Nuclear Regulatory Commission

's Washington, DC 20555 ~ ~' '#cI Q j}~[ 'f'

Dear Mr. Boyd:

MONTICELLO NUCLEAR GENERATING PLANT Docket No. 50-263 License No. DPR-22 Failure of Containment Isolation Yalves to Meet Leak Tightness Criteria Attached are eight Licensee Event Reports describing containment isolation valves which required corrective maintenance following Type C leakage tests.

A detailed discussien of each valve deficiency will be included in the " Reactor Containment Building Integrated Leak Rate Test Report" to be submitted following the Type A test scheduled this month and in the next Monticello Semi-Annual Operating Report.

Yours very truly,

. ,W '

L. O. Mayer, P.

Manager, Nuclear Support Services LOM/DG / deb l

I cc: J. G. Keppler G. Charnoff MPCA > U, Attn: J. W. Ferman m --

9105070370 751111 . .s CF ADDCK 050 63 g

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