ML20236V373

PN-75-078:on 750827,unplanned Radioactive Liquid Release from Turbine Bldg Sump to Discharge Cooling Canal.Samples of Canal Water & River Water Upstream & Downstream Confirmed Only Background Activity Existed.Follow Up in Progress

ML20236V373
Person / Time
Site:	Prairie Island
Issue date:	08/28/1975
From:	Jennifer Davis, Thornburg H, Warnick R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
To:
References
PN-75-078, PN-75-78, NUDOCS 9808030123
Download: ML20236V373 (1)

Text

PLf L3Vs6 C: h d C Af PRELIMINARY NOTIFICATION - NOT FOR PUBLIC DISCLOSURE

,. gb August 28, 1975 h, -

PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE --PN-75-78

1. This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance. The informatic.n presented is as initially received without verification or avaluation and is basically all that is known by OIE staff as of 1:30 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:

Northern States Power (Prairie Island 1 and 2)

Subject:

UNPLANNED RELEASE OF LIQUID RADIOACTIVE WASTE Northern States Power informed the Region III inspector who was at the site of an unplanned radioactive liquid release from the turbine building su=p to the discharge cooling canal.

The release was associated with a leak in the liquid radioactive waste  :

evaporator steam coil which was shut down for maintenance work. The path of the radioactive liquid was via the system piping through a g g '

normally closed valve to the turbine, building sump. The liquid was  ; .

. automatically pumped from the sump with turbine building drainage to I the cooling canal, l

The extent of the release is being quantified by the licensee. Initial I determination indicates allowable limits were not exceeded. Samples of canal water and river water upstream and downstream of the plant con-firned only background activity existed.

Based on preliminary information, we do not consider the release to be a health and safety problem. Followup by the Region is in progress.

Notification of the State of' Minnesota is planned.

p Region III received notification of this occurrence from the inspector at the site who was informed by the Plant Supervisor at 6:00 p.m.,

August 27, 1975.

l (D E

Contact:

RFWarnick, IE x7261 EDThornburg, IE x7353 JGDavis, IE x7541 N Q.  !

ED

@ Distribuwien: ..

b- Chairman Anders Commissioner Mason S. J. Chilk, SECY (9 Commissioner Gilinsky Commissioner Rowden G. F. Murphy, JCAE N.ws

. Co=issioner Kennedy C. C. Kammerer, CA ON on L. V. Gossick, EDO D. F. Knuth, IE J. A. Harris, PA D ',

H. H. Brown, ISP T. J. McTiernan, AIA

@g} . B.K.C. Rasche, R. Chapman, NMSSNRR H. K. Shapar, ELD D Transmitted: P Bldg 3 h ; H St 7h ; MNBB

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! e i a .;. .. x ' J PRELIMINARY NOTIFICATION - NOT FOR PUBLIC DT.SCLOSFRE L____________________