ML18152B239
| ML18152B239 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 10/07/1988 |
| From: | Cartwright W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NUDOCS 8810210172 | |
| Download: ML18152B239 (3) | |
Text
e VIRGINIA.ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261 October 7, 1988 United States Nuclear Regulatory Commission Region II 101 Marietta Street, N. W.
Suite 2900 Atlanta, Georgia 30323 Gentlemen:
VIRGINIA ELECTRIC AND POWER COMPANY SURRY POWER STATION UNITS 1 AND 2
\\ *-
-serial No.
,1.......
NL/HWB:hwb Docket Nos.
License Nos.
SAFETY SYSTEM FUNCTIONAL INSPECTION:
RESTART PREREQUISITES INTRODUCTION 88-660 R2 50-280 50-281 DPR-32 DPR-37 On Friday September 30, 1.988 a meeting was held at Surry Power Station to discuss the preliminary results of the. Safety System Functional Inspection (SSFI) conducted by the NRC on the Service.
Water (SW) and Recirculation Spray (RS) Systems.
During the review of the results, two critical areas of concern were identified:
A.
Maintenance of intake canal level. inventory including the capability of systems for emergency makeup to the canal B.
Performance of service water heat exchangers At the conclusion o.f this meeting, Virginia Power committed to the implementation of a program prior to restart of Unit 1 and Unit 2 to demonstrate the capability of these systems, and in particular certain specific components, to meet their design performance requirements.
The purpose of *this letter is to document in writing these commitments.
MAINTENANCE OF INTAKE CANAL INVENTORY It will be demonstrated that the systems required for *the maintenance -of the necessary intake canal inventory ar~ capable of performing their functions under a
range of design conditions including single failure without taking credit* for operation of associated non-safety grade equipment.
This effort will address the following:
- 1.
Establishing the support operation conditions.
minimum canal of required inventory components requirements to Under accident
- 2.
Determination of the makeup requirements to the intake canal under loss of offsite power conditions, and the capability of the Emergency Service Water (ESW) system to perform this function under design seismic and temperature conditions.
- 3.
Ability to maintain canal inventory by isolating non-essential uses of canal water under loss of offsi te power and accident conditions.
PERFORMANCE OF SERVICE WATER SYSTEM HEAT EXCHANGERS It will be demonstrated that the Service Water system heat exchangers are capable of performing their design heat transfer functions.
In particular, the specific issue of potential fouling due to corrosion, debris and marine growth will be addressed by a combination of inspections, cleaning
- and, when necessary, performance testing.
This effort will address the following:
- 1.
Recirculation Spray Heat Exchangers 2,.
Control Room
& Emergency switchgear Room Air Conditioning Chiller Condensers
- 3.
Charging Pump Lube Oil Coolers
SUMMARY
The resolution of these issues is expected to include revision of calculations, performance of special tests, system inspections, expansion
- of maintenance and surveillance procedures, and in some cases, plant modifications.
It is our intention to pursue those activities necessary to ensure the capability and reliability of these systems and components prior to restart.
The additional items of concern identified by the Safety system Functional Inspection process are under evaluation and will be addressed at the formal exit meeting.
We will continue to keep you informed of our status
- and progress in these efforts.
If additional information is required, please let us know.
W. R~ Cartwright Vice President - Nuclear
e cc:
- u. s. Nuclear Regulatory Commission Attention:
Document Control Desk Washington, D. c.
20555 Mr. W. E. Holland NRC Senior Resident Inspector Surry Power Station Mr. Chandu P. Patel NRC Surry Project Manager Project Director II-2 Division of Reactor Projects - I/II