ML20133L085
| ML20133L085 | |
| Person / Time | |
|---|---|
| Site: | Hope Creek  |
| Issue date: | 08/05/1985 |
| From: | Mittl R Public Service Enterprise Group |
| To: | Butler W Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8508120492 | |
| Download: ML20133L085 (4) | |
Text
7 A..
O PS G Company Puttc Serece Electnc and Gas 80 Park Plaza, Newark, NJ 07101/ 201430-8217 MAILING ADDRESS / P.O. Box 570, Newark, NJ 07101 Robert L. Mitti General Manager Nuclear Assurance and Regulation August 5, 1985 Director of Nuclear Reactor Regulation United States Nuclear Regulatory Commission 7920 Norfolk Avenue Bethesda, Maryland 20814 Attention:
Mr. Walter Butler, Chief Licensing Branch 2 Division of Licensing Gentlemen:
RESPONSE TO PVORT OPEN ITEM 1.b HOPE CREEK GENERATING STATION DOCKET NO. 50-354 Pursuant to the NRC PVORT/SQRT audit held at the Hope Creek Generating Station on May 7-10, 1985, Public Service Electric and Gas Company (PSE&G) hereby submits response to PVORT Open Item 1.b - Service Water Pump (AD-502) Functionality.
This issue concerns demonstrating that the service water pumps can perform their safety related function given the present cyclone separator system design.
The response to the remaining concern associated with this issue regarding adequacy of pump instrumentation, will be submitted to the NRC by August 31, 1985.
Should you have any questions in this regard, please contact us.
Very truly yours, k.L. Gd i.A.
8508120492 850805 DR ADOCK 05000354 s
\\
Attachment tp The Energy People 9'MH 2 (3W 4 84
I.
o.
Director of Nuclear 2
8/05/85 Reactor Regulation C
D.H. Wagner USNRC Licensing Project Manager
]
A.R.
Blough USNRC Senior Resident Inspector
v.
ATTACHMENT PVORT AUDIT OPEN ITEM 1.b SERVICE WATER PUMP (AD-502) FUNCTIONALITY Equipment Safety Requirements The service water pumps are designed for Delaware River water.
An analysis of water in the area of Artificial Island was provided to the pump manufacturer prior to purchase.
The service water pumps are designed to accept lube water from the pump discharge header.
Two 50% cyclone separators have been provided by the pump manufacturer to filter silt particles from the water and ensure clean flow to the pump bearings and stuffing box.
It is likely that a pump with only one cyclone separator in service will overheat causing the loss of the pump from service.
A discussion of degraded modes of operation is found below under " System Safety Requirements".
The cyclone separators were designed and furnished by the manufacturer's of the service water pumps.
We have provided the required inlet pressure, flow rates and water quality to assure that the pump lubrication water can meet their cyclone separator outlet water quality of 100 microns (max.).
The cyclone separators are designed for an inlet water quality of 250 microns, which is equi-Valent to the service water strainer outlet water quality.
In addition, the Service Water Hypochlorination System provides protection against biofouling.
The startup program will provide verification that the equipment will properly operate as designed.
System Safety Requirements During normal plant operation, two service water pumps (one in each loop) are required.
The second pump in each loop is on standby and starts when the operating pump in that loop fails.
During a normal shutdown, all four service water pumps initially supply cooling water to the four SACS and two RACS heat exchangers.
For long term normal shutdown, only two service water pumps are required to cool two 7
SACS and two RACS heat exchangers.
Unavailability of l
one service water loop will extend the required shutdown time, but the remaining loop is sufficient to bring the plant to cold shutdown.
t I
l l,. - - - _ _ - _ - _ _ _ _ - _ _ _ _ - _ _ _ _ _
.a
.Page 2 In the event of loss of offsite power (LOP) without LOCA, four service water pumps will' start to cool all SACS and RACS heat exchangers.
In the event of one loop failure, only one service water loop with two pumps is required.
In the event of a LOCA, all four service water pumps provide flow through the redundant loops to provide cooling water to the SACS heat exchangers.
Only one service water pump in each system loop is required to satisfy minimum cooling requirements of the SACS heat exchangers in the initial phase when RHR heat exchangers are not in service.
During the long-term containment-cooling mode, one loop with two service water pumps operating provides sufficient cooling to satisfy the minimum require-ments of the SACS heat exchangers.
In this phase only one SACS loop is needed.
The Service Water System design provides redundancy against loss of function due to a single active or passive component failure, during post loss of coolant accident (LOCA),
and/or LOP thus assuring that its safety related function can be-performed.