ML20081J223

Revised Monthly Operating Rept for Sept 1983

ML20081J223
Person / Time
Site:	Pilgrim
Issue date:	09/30/1983
From:	Harrington W BOSTON EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
References
83-270, NUDOCS 8311080372
Download: ML20081J223 (2)

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i BOSTON EDISON COMPANY PILGRIM NUCLEAR POWER STATION DOCKET NO. 50-293 Operational Summary for September, 1983 The month commenced with the unit at 99% power.due to fuel depletion. This power level was maintained until September 4,1983, when it was temporarily

reduced to 60% for a change in control rod pattern. After the rod pattern change, the unit was returned to 100% power which was maintained until September 9, 1983. On this date, the "A" Recirculation pump tripped while brushes were being changed on the MG set. (Ref.: LER 83-049/03L-0).

Power was then returned to 90% at which time the reactor scrammed due to a false low Reactor Water level indication. The false indication was re-ceived during surveillance testing. In addition, the main condenser was backwashed on September 9, 1983.

On the morning of September 10, 1983, plant startup commenced until the reac-tor scrammed due to the turbine bypass valves closing at 19% power. Startup recommenced and the generator was synchronized to the grid on September 11, 1983. The unit maintained 99.5% power from September 13, 1983, until September 19, 1983, when control rod exercises were performed. After the con-l trol rod exercises, the unit was returned to 100% power which was maintained until September 25, 1983.

On September 23, 1983, the HPCI System was declared inoperable when a HPCI turbine steam isolation valve failed to open during a surveillance test.

(Ref.: LER 83-052/03L-0). On September 25, 1983, power was reduced and control rod exercises performed. Steady state operation was maintained un-til September 30, 1983, when the HPCI System was declared inoperabic.

(Ref.: LER 83-048/01X-0).

, Safety / Relief Valve Challenges j

Month of September, 1983 Requirement: T.M.I. T.A.P. II.K.3.3 Date: September 9, 1983 Valve #: RV-203-3B i

Reactor Pressure: Approximately 1000 psig I

t Reason: Manual actuation of valve to control reactor pressure follow-l ing a scram.

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' B311080372 830930 PDR ADOCK 05000293 R PDR l

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BOSTON EDISON COMPANY 800 BOYLSTON STREET BOSTON, MAssACHUBETTe 02199 WILLIAM D. HARRINGTON seerson viss posesosNT N ECbsAR October 31, 1983 BECo Ltr. #83- 270 Director Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D.C. 20555 Attn: Document Control Desk Docket No. 50-293 License DPR-35

Subject:

Revision to September, 1983 Monthly Report

Dear Sir:

Attached please find revised information concerning Safety / Relief Valve Challenges which occurred during the month of September, 1983. Please destroy the page of the September Monthly Report which addresses safety /

relief valve challenges and replace it with the attached. This information was incorrectly stated in the September Report.

Respectfully submitted, W. D. Harrington

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cc: Regional Administrator, Region 1 U. S. Nuclear Regulatory Commission l

631 Park Avenue King of Prussia, PA 19406 U. S. Nuclear Regulatory Commission Document Control Desk Washington, D.C. 20555 Standard BECo LER Distribution l((

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