ML20198Q427

PNO-TMI-82-002:on 820113,NRC Resident Radiation Specialist Noted Through Routine Review of Licensee Logs That Valve Dhiv 28 of Bwst Had Leaked.Leak Believed to Have Been Caused by Recent Extreme Cold Weather

ML20198Q427
Person / Time
Site:	Three Mile Island
Issue date:	01/14/1982
From:	Barrett L, Oneill, Shanbaky M Office of Nuclear Reactor Regulation
To:
References
PNO-TMI-82-002, PNO-TMI-82-2, NUDOCS 9711120208
Download: ML20198Q427 (1)

Text

'MOWMM. C 0F) pREL1MINARY HOTIF1 CATION OF EVENT OR UNUSUAL OCCURREffCE--PNO-Tal- 82-02 January 14, 1982 This preliminary notification constitutes EARLY notice of events of POSS!BLE safety or public interest signi ficance. The information is as initially received without verifi-on or evaluation and is basically all that is known by NRC staff on this date, ility: Metropolitan Edison Company Licensee Emergency Classification:

Three Mile Island, Unit 2 X Not Applicable Docket No. 50-320

Subject:

LEAK FROM B0 RATED WATER STORAGE TANK (BWST)

At 4 :00 PM on January 13, 1982, an NRC Resident Radiaticn Specialist noted, through routine review of licensee's logs, that valve DHIV 28 (instrument pipe and valve to

)

BWST sample point) of the BWST had leaked. The leak rate was estimated to have been approximately 1 liter / minute; as much as 180 liters could have spilled to the ground .

at one side of the tank. Initial sample of the liquid indicated the following activity:

137C s - 3.7 E-4 uC1/ml 134C s - 1.1 E-4 uCi/ml 60C o - 1.3 E-5 uCi/ml >

The leak is believed to have been caused by the recent extreme cold weather which froze a small pipe (3/8 inch) and subsequently cracked a pipe fitting. The leak began after a backup heat tracing line was put in service at about 10:00 AM'on 1/13/82.

Upon detection, the licensee immediately isolated the leak.

, ' licensee contained the area and plans to rentve the contaminated soil from the spill

. . Future results of the licensee's ground water monitoring program will be audited ,

y the TMIPO, as historically Test Boring 2 (East of BWST) has shown periodic positive -

indications believed attributed to past leakage from the BWST.

Media interest may occur because of public sensitivity to TMI related events and the (9 licensee issued a press release. The NRC does not plan to issue a press release at \

this time. The Commonwealth of Pennsylvania was informed.

This preliminary notification is issued for information only u:id the NRC plans to continue monitoring events as they occur.

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The NRC TMI Program Office received notification of this occurrence by inspector review

' of licensee's logs at 3:45 PM on January 13, 1982, and this information was current as of 5 :30 PM, Januar 14, 1982.

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Contact:

B. O'Neill 590-1144 M. Shanbaky 590-1140 r ett 590-1120 t'is tribution : .

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a. R:IV R:V J. Tourtellotte  ;

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