ML19343A218

Forwards LERs 80-028/03L-0,80-029/03L-0 & 80-030/03L-0

ML19343A218
Person / Time
Site:	Millstone
Issue date:	09/08/1980
From:	Mroczka E NORTHEAST NUCLEAR ENERGY CO.
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19343A219	List: 05000336/LER-1980-028-03, /03L-0:on 800811,at 100% Power,Control Element Assembly 41 Dropped from 180 to Zero Steps.Caused by Faulty Jumper Cable from Refuel Disconnect Panel to Reactor Head. Power Reduced & Assembly Realigned.Replacement Planned 05000336/LER-1980-029-03, /03L-0:on 800812,during Surveillance Test on 12 U diesel,125 Vdc Ground Alarm Received.Caused by Frayed Insulation on Wire in Bendix Connector Allowing Contact Between Bare Wire & Connector Shell.Wire Recovered 05000336/LER-1980-030-03, /03L-0:on 800812,during Routine Operation, Containment Air Temp Exceeded 120 F.Caused by Svc Water Temp Control Valve to Reactor Bldg Closed Cooling Water Heat Exchangers Being Set Too High.Valve Readjusted ML19343A218
References
MP-2-4474, NUDOCS 8009160457
Download: ML19343A218 (1)

Text

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September 8, 1980 MP-2-4474 Mr. Boyce h. Grier Director, Region I Office of Inspection and Enforcement U.S. Nuclear Regulatory Comission 631 Park Avenue King of Prussia, Pennsylvania 19406

Reference:

Facility Operating License DPR-65 Docket No. 50-336 Reportable Occurrence 50-336/E0-28/3L 50-336/80-29/3L 50-336/80-30/3L

Dear Mr. Grier:

Pursuant to the requirements of Millstone Unit 2 Appendix A Technical Specifications, Section 5.9.1.9.b, the following Licensee Event Reports are submitted:

80-28/3L Dropped CEA at power and subsequent operation in Action Statements 3.1.3.1.e and 3.2.4.

80-29/3L -

120 diesel inoperable and operation in Action Statement 3.8.1.1.a.

80-30/3L -

Containment air temperature high and operation in Action Statement 3.6.1.5.

An additional three copies of the reports are enclosed.

4 Yours truly, i

NORTHEAST NUCLEAR ENERGY COMPANY ll P' /SW

.J. Mrocz Station Superintendent g

Millstone Nuclear Power Station 5

EJM/JH:kaf

/ l LER's 80-28/3L, 80-29/3L and 80-30/3L Attachments:

cc: Director, Office of Inspection and Enforcement, Washington, D.C.

(30)

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

U.S. Nuclear -Regulatory Comission, c/o Document Management Branch, Washington, D.C. 20555 8009160457_ J

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