ML18081B278
| ML18081B278 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 03/28/1980 |
| From: | Mittl R Public Service Enterprise Group |
| To: | Parr O Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8004010449 | |
| Download: ML18081B278 (2) | |
Text
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Public Service Electric and Gas Company 80 Park Place Newark, N.J. 07101 Phone 201/430-7000 March 28, 1980 Director of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C.
20555 Attention:
Mr. Olan D. Parr, Chief Gentlemen:
Light Water Reactors Branch 3 Division of Project Management STEAM GENERATOR LEVEL SETPOINTS REFUELING WATER STORAGE TANK ALARMS NO. 2 UNIT SALEM NUCLEAR GENERATING STATION DOCKET NO. 50-311 As a result of discussions with members of your staff, PSE&G will provide a second low level alarm on the RWST.
This alarm will be set at a point lower than the first low level alarm, but high enough to indicate sufficient water availability for changeover from injection to recirculation.
This alarm will be installed prior to low power testing.
Additionally, the steam generator low-low level setpoints will be changed as indicated below.
- 1.
The steam generator narrow range level instrument reference legs will be insulated to minimize reference leg heatup effects in the short term following a high energy line break.
This will reduce the effect on the low-low level setpoint to approximately 2%.
- 2.
The low-low level setpoint will incorporate the entire environmental induced error on the transmitter.
The error factor will be based on a 1-hour test time instead of a 5-minute test time (time for trip function to be accomplished).
This error factor is 10%.
- 3.
A minimum margin of 3% will be used in the setpoint.
low-low level
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Qf:~\\D The Energy People 95-0942
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Director of Nuc. Reactor Reg. 3/28/80
- 4.
The new low-low level setpoint will be 17%, based on the following factors:
Minimum trip point Margin Accuracy (instrument through bistable trip)
Heatup effect from insulated reference leg Environmental (transmitter) 0%
+ 3%
+ 2%
+ 2%
+10%
The setpoint changes and the installation of insulation on the reference legs will be completed prior to low power testing.
Should you have any questions, do not hesitate to contact us.
FSl 1/2 Very truly yours, t:/JN R. L. Mittl General Manager -
Licensing and Environment Engineering and Construction