ML18079A639
| ML18079A639 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 06/01/1979 |
| From: | Schneider F Public Service Enterprise Group |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| NUDOCS 7908010149 | |
| Download: ML18079A639 (2) | |
Text
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Frederick W. Schneider Vice President Public Service Electric and Gas Company 80 Park Place Newark, N.J. 07101 201 /430-7373 Production Mr.
Bo~ce H. Grier, Director U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region l 63l Park Avenue King of Prussia, Pennsylvania l9406
Dear Mr. Grier:
NRC IE BULLETIN NO.79-06A, REV. l NO. l AND 2 UNITS SALEM GENERATING STATION June l, l979 In response to your letter of April 18, 1979 transmitting NRC IE Bulletin No.79-06A, Revision No. 1, which was received on April 23, l979, we offer the follo~ing in respect to Item 13:
A change to Technical Specification Tables 3.3-3, 3.3-4, 3.3-5 and 4.3-2 has been forwarded to Mr. A. Schwencer, Chief, NRC Operating Reactors, Branch l, on May 16, l979.
The change reflects deletion of coincident Pressurizer Low Level and Low Pressure Signals for initiating safety injection.
The proposed-design consists of a 2-of-3 coincidence of Pressurizer Low Pressure Signals.
Design changes identified to date as a.result of our evaluation of the Three Mile I~land incident are as follows:
- l.
Provision of additional control room alarms to indicate a "non-closed" condition of any pressurizer PORV~.
- 2.
Incorporation of a compµter calculation with CRT display of reactor coolant system temperature and pressure information.
This program will display the temperature of the hottest in-core thermocouple, a corresponding saturation pressure, actual pressure, degree of sub-cooling, and the margin to saturated pressure.
- 3.
Modification of runout protection for the motor-driven auxiliary feedwater pumps.
This change will improve the reliability of
~
the auxiliary feedwater system by allowing a manual override of the pump discharge pressure runout protection.
Mr. B. 6/1/79
- 4.
Revision of the control circuitry for valve WL12 (reactor coolant drain tank to waste hold-up tank isolation valve).
This change will insure that reset of the containment isolation signal will not result in inadvertent transfer of fluids from the RCDT to the waste hold-up tank.
Redundant isolation valves already exist on this path to the waste hold-up tank, but a specific set of abnormal operating condi-tions, coupled with a failure of the valve redundant to WLl2, could have resulted in an automatic opening of WL12 and sub-sequent pumping of reactor coolant drain tank contents to the waste hold-up tank.
The proposed change will prevent an automatic opening of valve WLl2.
The above changes do not require changes in.the Technical Specifi-cations.
If additional changes in design or Technical Specifications are deemed necessary in the future, we will notify you with subse-quent amendments to this bulletin response.
CC NRC Office of Inspection and Enforcement Sincerely, Div. of Reactor Ope~ations Inspection Washington, D. C.
Mr. L. J. Norrholm NRC, Hancocks Bridge, N.J.
1 I