ML20081J223
| 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) | |
Text
,
.. * ~ >
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-trol rod exercises, the unit was returned to 100% power which was maintained l
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 Month of September, 1983 j
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
Reason:
Manual actuation of valve to control reactor pressure follow-t l
ing a scram.
l
)
B311080372 830930 PDR ADOCK 05000293 R
PDR l
S e.
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
- em l
cc: Regional Administrator, Region 1 l
U. S. Nuclear Regulatory Commission 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((
P
-e.
. ~, - - - -.
~
-r,
-.~-n,...,---,
,