ML14113A288
| ML14113A288 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 11/01/1980 |
| From: | Gahm J PUBLIC SERVICE CO. OF COLORADO |
| To: | |
| Shared Package | |
| ML14113A289 | List: |
| References | |
| NUDOCS 8011140343 | |
| Download: ML14113A288 (2) | |
Text
W PUBLIC SERVICE COMPANY OF COLORADO FORT ST.
VRAIN NUCLEAR GENERATING STATION MONTHLY OPERATIONS REPORT NO.
81 SEPTEMBER, 1980
This report contains the highlights of the Fort St. Vrain, Unit No. 1 activities, operated under the provisions of the Nuclear Regulatory Commission Operating License, OPR-34. This report is for the month of September, 1980.
1.0 NARRATIVE
SUMMARY
OF OPERATING EXPERIENCE AND MAJOR SAFETY RELATED MAINTENANCE 1.1 Summary At the beginning of the report period, the reactor was in a shutdown condition and preparations.were being made for scheduled maintenance, surveillance testing, and instrument calibration.
This work continued until September 27, 1980.
At 2100 hours0.0243 days <br />0.583 hours <br />0.00347 weeks <br />7.9905e-4 months <br /> on September 27, the reactor was brought critical and-power increased to less than or equal to 2% to facilitate feedwater and primary coolant clean-up. Power was limited to less than or equal to 2% due to the fire suppression surveillance requirements of Amendment 22 of the Technical Specifications, which had not yet been met at the end of the report period.
Spent fuel shipping continued throughout the period.
1.2 Operations On September 1, with the reactor shutdown, the prestressed concrete reactor vessel was depressurized to 0 psig and Loop 1 steam generators and circulators were cleared for maintenance. Core cooling continued with Loop 2 steam generators and circulators discharging heat to the main condenser.
On September 9, all core forced cooling was stopped to verify core heat rise calculations. Calculations proved to be adequately conservative and core cooling was again established.
On September 13, the bypass flash tank drains were directed to the decay heat exchanger, and on September 14, the condenser was taken out of service for maintenance.
On September 15, core forced cooling was stopped for approximately 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> to replace valves on the 150 psig header and on the condensate pumps. The main condenser was returned to service on September 16.
On September 17, core forced cooling was stopped for about 8.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> for instrument calibration.
On September 18, Loop 1 steam generator and circulators were placed in service and Loop 2 was shutdown.