ML20236V334

PN-75-067:on 750810,primary to Secondary Leak of Approx 0.3 to 0.4 Gpm in Unit 2 B Sg.Normal Shutdown Initiated Following Subsequent Slight Increase in Leak Rate

ML20236V334
Person / Time
Site:	Point Beach
Issue date:	08/11/1975
From:	Jennifer Davis, Thornburg H, Warnick R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
To:
References
PN-75-067, PN-75-67, NUDOCS 9808030093
Download: ML20236V334 (1)

Text

l pc e)jrG &. a h DO ;c PRELIMINARY NOTIFICATION - NOT FOR PUBLIC DISCLOSURE

. .m August 11, 1975

? PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE --PN-75-67

, This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance. The information presented is as initially received without verification or evaluation and is basically all that is known by OIE staff as of 4:00 p.m. on the date of this notification. IT SHOULD BE SPECIFICALLY NOTED THAT THIS NOTIFICATION MAY CONTAIN INFORMATION THAT LATER MAY BE DETERMINED TO BE INACCURATE OR INCONSISTENT. AN OFFICE OF INSPECTION AND ENFORCEMENT

. NOTIFICATION OF AN INCIDENT OR OCCURRENCE (BLUE SHEET) SUBSEQUENTLY WILL BE ISSUED IF WARRANTED.

Facility: Point Beach 2, Wisconsin Electric Power Company and Wisconsin Michigan Power Company Subjeet: STEAM GENERATOR TUBE LEAK Wisconsin Michigan Power Company reported a primary to secondary leak ,

of approximately 0.3 to 0.4 spm in Unit 2 "B" steam generator. The leak became detectable at approximately 3:00 p.m. on 8/10/75 and had increased to the above rate by 7:00 a.m. on 8/11/75. A normal shutdown I was initiated at approximately 11:30 a.m., 8/11/75, falloking a subsequent  !

- slight increase in leak rate. No significant releases of radioactivity '

occurred as a result of the event. ,On 8/11/75, the resident inspector reviewed plant operations with the leak and no discrepancies were

( identified. The outage for steam generator inspection and repairs is expected to last from two to four weeks.

The licensee and IE:III (Chicago) issued a press release on 8/11/75.

NRC's resident inspector, D. C. Boyd, received notification of this occurrence from G. Reed, Plant Manager at 7:00 a.m. on 8/11/75.

Contact:

RFWarnick, IE x7261 HDThornburg, IE x7353 JGDavis, IE x7541 Distribution:

Chairman Anders Co=missioner Mason S. J. Chilk, SECY' Commissioner Gilinsky Commissioner Rowden G. F. Murphy, JCAE Commissioner Kennedy C. C. Kammerer, CA L. V. Gossick, EDO D. F. Knuth, IE J. A. Harris, PA B. C. Rusche, NRR H. H. Brown, ISP T. J. McTiernan, AIA K. R. CltEj5 man, NMSS * ~ H. K. Shapar, ELD - .

Transmitted: P Blds 9/Jee .; E S t 9.W o .; MNBB f/ % '; Luge -

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( PRELIMINARY NOTIFICATION - NOT FOR PUBLIC DISCLOSURE N).'

9808030093 750811 PDR I&E PN-75-067 PDR