05000336/LER-1982-038, Forwards LER 82-038/03L-0.Detailed Event Analysis Encl

Forwards LER 82-038/03L-0.Detailed Event Analysis Encl

ML20065N075
Person / Time
Site:	Millstone
Issue date:	10/14/1982
From:	Mroczka E NORTHEAST NUCLEAR ENERGY CO., NORTHEAST UTILITIES
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20065N080	List: 05000336/LER-1982-038, Forwards LER 82-038/03L-0.Detailed Event Analysis Encl 05000336/LER-1982-038-03, /03L-0:on 820918,surveillance Testing Indicated Activity of 0.99 Uci Dose Equivalent I-131 in Primary Coolant.Caused by Small Number of Degraded Fuel Pins
References
MP-4225, NUDOCS 8210220060
Download: ML20065N075 (2)

LER-1982-038, Forwards LER 82-038/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
3361982038R00 - NRC Website

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A Y:I'::'::."::,' :::llll October 14, 1982 MP-4225 Mr. Ronald C. Haynes Regional Administrator, Region I Office of Inspection and Enforcement U. S. Nuclear Regulatory Comission 631 Park Avenue King of Prussia, Pennsylvania 19406

Reference:

Facility Operati.ig License No. DPR-65 Docket No. 50-336 Reportable Occurrence R0-50-336/82-38/03L-0

Dear Mr. Haynes:

This letter forwards the Licensee Event Report 82-38/03L-0 required to be submitted within thirty days pursuant to Millstone Unit 2 Appendix A Technical Specifications, Section 6.9.1.9.b, conditions leading to operation in a degraded mode permitted by a limiting condition for operation. An additional three copies of the report are enclosed.

Yours truly, NORTHEAST NUCLEAR ENERGY COMP 4Y l

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E.

. Mroczka Station Superintendent Millstone Nuclear Power Station EJM/RB:ejl

Attachment:

LER R0-82-38/03L-0 Director, Office of Inspection and Enforcement, Washington, D.C. (30) cc:

Director, Office of Management Information and Program Control, Washington, D. C. (3)

U.S. Nuclear Regulatory Commission, c/o Document Management Branch, Washington, D.C. 20555 0210220060 021014 y

PDR ADOCK 05000336 pt G

PDR

ATTACHMENT TO LER 82-38/03L-0 NORTHEAST NUCLEAR ENERGY COMPANY MILLSTONE NUCLEAR POWER STATION - UNIT 2 FACILITY OPERATING LICENSE NUMBER DPR-65 DOCKET NO. 50336 1.

Reactor power history 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> prior to event:

Millstone 2 was operating at 100% power until 2245, 17 September 1982, when it underwent a full power trip.

2.

Fuel Burnup by core region:

The Millstone 2 core consists of 3 regions and a center assembly.

The most burned region, consisting of Combustion Engineering manu-factured fuel, had a burnup of 28150 MWD /MTU.

The next region, consisting of Westinghouse fuel, had a burnup of 15810 MWD /MTU.

The new fuel, also manufactured by Westinghouse, had a burnup of 4580 MWD /MTU.

The center assembly, consisting of a single reinsert assembly, was manufactured by Combustion Engineering and had a burnup of 22000 MWD /MTU.

3.

Coolant purification flow was approximately 80 gpm during the 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> preceeding the event.

4.

There was no prior history of degassing operations in the period preceeding the event.

5.

The duration that the primary coolant exceeded 1.0 microcuries per gram Dose Equivalent Iodine 131 was less than 7 hours8.101852e-5 days <br />0.00194 hours <br />1.157407e-5 weeks <br />2.6635e-6 months <br /> on 18 September 1982.

Time /Date of Sample Microcuries per gram D.E.1-131 0045/18 September 1982 0.998(2hoursaftertrip) 0745/18 September 1982 0.738 (9 hours1.041667e-4 days <br />0.0025 hours <br />1.488095e-5 weeks <br />3.4245e-6 months <br /> after trip)