ML20098C763
| ML20098C763 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 09/24/1984 |
| From: | Harrington W BOSTON EDISON CO. |
| To: | Vassallo D Office of Nuclear Reactor Regulation |
| References | |
| RTR-REGGD-01.068, RTR-REGGD-1.068 84-160, NUDOCS 8409270188 | |
| Download: ML20098C763 (2) | |
Text
e i-BOSTON EDISON COMPANY i
500 BOYLSTON 5TREET EOSTON. MAssAcNueErre 02199 September 24, 1984 BECo.84-160 WILLIAM O. HARalNSTON esseeen vees pososessee
,w. m Mr. Domenic B. Vassallo, Chief Operating Reactors Branch #2 Division of Licensing Of fice of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D. C.
20555 License No. OPR-35 Docket No. 50-293 Recirculation System Startup Test Program
Reference:
1)
Reg. Guide 1.68, " Initial Test Program fo'r Water Cooled Nuclear Power Plants" 2)
Facility Operating License No. DPR-35 for PNPS - Condition of License #3.E.
3)
General. Electric Co. Startup Test Instructions for
" Recirculation System" dated May 1971 4)
PNPS Operating Procedure #2.4.17 " Trip of One Recirculation Pump" Boston Edison is presently in the process of planning the startup test program for Pilgrim Nuclear Power Station (PNPS).
Per your order of August 26, 1983 (part III C 4), we have replaced the recirculation system piping during RF0
- 6. As such, we believe the startup test program for the recirculation system falls under the auspices of Reg. Guide 1.68.
We have reviewed our initial test program dated May 1971 and determined several tests must be performed during startup from RF0 #6. Specifically, startup test titled " Recirculation System" will be conducted to evaluate s
recirculation flow and power level transients following the trip of a recirculation pump.
The basic procedure (from 1971) is as follows:
1.
Establish steady-state operating conditions.
2.
Record data for a Core Performance Evaluation.
3.
Record LPRM and APRM data or use process computer if available.
4.
Start the recorder and collect at least 5 seconds of steady-state data..
5.
Trip the power to the M-G set driving Recirculation Pump.
6.
Isolate the tripped recirculation pung by closing it's associated discharge valve.
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- Mr. Domenic B. Vassallo, Chief September 24, 1984' Page 2-7.
When steady-state conditions are achieved, stop the test recorder and repeat Steps 2 and 3 above.
8.
Return to two pump operation from one pump tripped in accordance with standard operating precedures.
A trip of a recirculation pump is governed by Condition of License #3.E "The reactor shall not be operated with one recirculation loop out of service for more than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />...the plant shall be placed in hot shutdown condition within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> unless the loop is sooner returned to service". This condition will be met as the testing will only last 4-6 hours.
In conclusion:
~
1)
This test is similar to that performed during initial startup; 2)
PNPS is designed for a loss of one or both recirculation pumps; 3)
The test will be conducted in accordance with 10CFR50.59 with procedures (updated f rom 1971) approved by the PNPS Operational Review Committee.
This letter is submitted for your information. Should you have any questions, please do not hesitate to contact us.
Very truly yours.
MTL/ns