ML20066K100
| ML20066K100 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 09/28/1982 |
| From: | Warembourg D PUBLIC SERVICE CO. OF COLORADO |
| To: | Jay Collins NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| Shared Package | |
| ML20066K040 | List: |
| References | |
| RTR-NUREG-0737, RTR-NUREG-737, TASK-1.C.6, TASK-TM P-82424, NUDOCS 8211290364 | |
| Download: ML20066K100 (13) | |
Text
.
public Service Campany F Cderado 6
16805 WCR 19 1/2, Platteville, Colorado 80651 go Dl2 September 28, 1982 Fort St. Vrain Unit #1 P-82424
~,
Mr. John T. Collins, Regional Administrator U. S. Nuclear Regulatory Commission E,I E r
611 Ryan Plaza Dr., Suite 1000 Arlington, TX 76012
SUBJECT:
REFERENCE:
1.
PSC Letter dated September 10, 1982 Waretabourg to Collins (P-82381)
Dear Mr. Collins:
In response to a verbal request from M".
G. L. Plumlee, III the attached is hereby submitted as a supplement to our original submittal (Reference 1) concerning NUREG 0737, Article I.C.6.
This supplemental response revises Attachments 1 and 2 of our original submittal as noted by the revision lines provided in the attachments.
In addition to Attachment 2 certain other valves which are a part of the " sealed valve list" including the manual valves of the reserve shutdown system are critical.
The revised attachments constitute our response to the requirements set forth in NUREG 0737, Article I.C.6.
If you have any further question, please give Mr. Ed Hill or myself a call at (303) 785-2223.
i Very truly yours, 1
- k W11[ &.
Don W. Warembourg Manager, Nuclear Produ ton Fort St. Vrain Nuclear Generating Station i
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- tl Attachments 1/
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Revision 1 9-23-82 The following is an evaluation of the applicability of NUREG 0737 Article I.C.6. to the list of structures, systems and components required for a safe shutdown of the plant (Table 1.4.2 FSAR) l 1.
The Reactor Building below the refueling floor or the Turbine l
Building below the operating floor has no associated valves.
l Therefort, aone are applicable.
l 2.
Manual valves of the PCRV, its support structure and internals including the reactor core, core support structures, the economizer evaporator-superheater of one steam generator, one helium circulator, the control rod drives and reserve shutdown system require the same valve line up during operation as during safe shutdown cooling. Therefore, these are not applicable.
The reserve shutdown system is required to operate in the event forced cooling is lost and cannot be regained.
The manual valves are a part of the sealed valve system to assure this capability.
Procedures applied to sealed valves are at least as l
restrictive as those governing critical valves.
Therefore, l
these valves will not be a part of the critical valve list.
3.
The water turbine drives of the helium circulators and the steam generators may be required to operate using emergency feedwater, emergency condensate and/or fire water using the emergency feedwater or condensate header for safe shutdown cooling.
All valves effecting these flow paths were considered in this review.
Manual valve positions are the same for normal operation as when used for safe shutdown cooling.
Boundary valves which might be in the wrong position which could adversely effect these flow paths would also adversely effect normal operation and would, therefore, be discovered. There are valves in the flow path that could, however, be in the wrong position without being discovered since there is no flow during normal operation.
These valves then are treated as critical valves.
I 1
l l
i I
k
1 Revision 1 9-23-82 1
l 4 i
4.
The helium circulator bearing water system for the operating circulator functions the same for safe shutdown cooling as for normal operation, however, the make up may be from the back up bearing water system with the make up pumps in standby.
Therefore, the valve line up for the bearing water make up pumps are included as critical valves.
The manual valve between the gas pressurizer and the emergency bearing water accumulator is positioned as a critical valve.
5.
Steam generator associated valves are the same for normal operation-as for safe shutdown cooling except that the reheaters can be used for safe shutdown cooling using condensate from the emergency condensate header and discharging to the condenser.
Valves in this flow path are considered as critical valves.
6.
The circulating water make up system is the same for normal as for safe shutdown cooling.
Valves of the redundant flow path l
are considered critical valves.
The cross connect to service l
water makeup is considered critical.
l 7.
The service water system valve lineup is the same for normal as for safe shutdown cooling except for the emergency makeup valve l
station which is required to be operable and is thus considered l
critical.
l 8.
The fire water system, including the engine driven pump, pump l
pit and associated piping for helium circulator water turbine l
drive operation, but excluding the storage tank, the fire water l
connection to emergency condensate line and to emergency l
- line, and emergency water booster pumps were l
considered in this review. Manual valves are normally in the l
correct position for safe shutdown cooling. Only the valves in l
the flow path are critical and require independent verification.
l 9.
Manual valves of the reactor plant cooling water system are 1
positioned the same for normal operation as for shutdown l
cooling. These are not considered critical.
i
- 10. The fuel storage facility cooling is the same for normal as for l
safe shutdown cooling and the associated valves are not l
l considered critical.
i l
1 i
I
Revision 1 9-23-82 11. Valves of the helium purification system are the same for normal as for safe shutdown cooling except those valves used for emergency depressurization of the PCRV.
These valves are considered critical.
12.
Essential electrical busses are operated the same for normal as l
for safe shutdown cooling.
Improper breaker position would be l
discovered without independent verification. Therefore, they l
are not considered critical.
- 13. Standby electric generators are functionally tested following l
completion of work.
A successful test veri fyt.
correct l
operation.
Therefore, this equipment is not considered l
critical.
- 14. The station battery operation is the same for normal as for safe l
Misoperation would be discovered without l
independent verification.
Therefore, this equipment is not l
considered critical.
15.
Portions of the plant protective system required to be operable during safe shutdown cooling are also required to be operable at I
power. No independent verification is required.
This equipment I
is not considered critical.
16.
The Control Room emergency filter fan is considered to be critical equipment.
l 17.
Instrument and control systems, valves of the instrument air and l
valve actuating hydraulic systems are the same for normal as is l
desirable for safe shutdown cooling.
No independent l
verification is required and this equipment is, therefore, not I
considered critical.
Reuision 1
~
9-23-82
_7_
P&I Valve No.
Coord.
Location or Service Position PI-21-4 V-31858 A-6 P-2105 Suction Closed V-21914 A-6 F-2105 Inlet As Required V-21915 A-6 F-2105S Inlet As Required V-21916 A-6 F-2105 Outlet As Required V-21917 A-6 F-2105S Outlet As Required V-21743 A-5 P-2105 Discharge Open V-211311 A-4 P-2105 Discharge to T-2105 Open V-211309 B-5 P-2105 Discharge to T-2104 Open V-211315 B-6 P-2108 Cond Suction Open V-46819 B-6 P-2108 Fire Wtr. Suction Closed V-21901 8-6 F-2104 Inlet As Required V-21902 B-6 F-2104 Outlet As Required V-21903 B-6 F-2104S Inlet As Required V-21904 B-6 F-2104S Outlet As Required V-211214 B-5 P-2108 Disch. to T-2104 Closed V-211216 B-5 P-2108 Disch. to T-2105 Closed PI-21-5 V-211615 A-5 Loop 1 Pelton Supply Open V-211616 A-5 Loop 2 Pelton Supply Open
Revision 1 9-23-82
, P&I Valve No.
Coord.
Location or Service Position FI-21-6 LV-21130 HJ B-4 T-21110 Emergency Orain HJ Off*
PI-21-7 HV-2109-1 HJ A-4 A Circ Pelton Supply HJ Off HV-2109-2 HJ A-3 A Circ Pelton Return HJ Off V-21960 B-6 T-2112 Discharge Isolation Open PI-21-8 HV-2115-1 HJ A-4 C-2102 Pelton Supply HJ Off HV-2115-2 HJ A-3 C-2102 Pelton Return HJ Off PI-21-9 HV-2110-1 HJ A-4 C-2103 Pelton Supply ilJ Off HV-2110-2 HJ A-3 C-2103 Pelton Return HJ Off V-21963 B-6 T-2113 Discharge Isolation Open P-21-10 HV-2116-1 HJ A-4 C-2104 Pelton Supply HJ Off HV-2116-2 HJ A-3 C-2104 Pelton Return HJ Off Note: HJ denotes hand jack
Revision 1 9-23-82
. P&I Valve No.
Coord.
Location or Service Position PI-22-1 Emerg. Cond. to V-211565 C-5 P-2109 & P-2110 Open Emerg. Cond. to V-211566 C-5 P-21110 Open V-211585 C-5 P-2109 Suction Open V-211583 A-4 P-2110 Suction Open V-211586 C-5 P-2109 Disch.
Open P-2109 & P-2110 Disch V-211567 C-5 to Emerg. Cond.
Open V-211568 C-5 P-2110 Disch to Emerg. Cond.
Open V-211584 A-5 P-2110 Disch.
Open V-211571 A-5 M-21834 Isolation Closed V-211574 A-5 M-21834 Isolation Closed V-22360 A-5 Emerg. Feedwater to Loop I Open PI-22-3 Emerg. Cond, to Loop I Breaker HV-2291 Brkr. C-5 Reheater Block Closed Emerg. Cond. to Loop I FV-2239 HJ C-6 Reheater Flow Valve HJ Off
'I f
Revision 1 9-23-82
_4_
P&I Valve No.
Coord.
Location or Service Position PI-22-4 Loop I Reheater Breaker HV-22131 Brkr. A-3 to Condenser Block Closed PI-22-6 Emerg. Feedwater V-22361 A-5 ta Loop II Open PI-22-8 Emerg. Cond to Loop 2 Breaker HV-2290 Brkr.
C-5 Reheater Block Closed Emerg. Cond. to Loop 2 FV-2240 HJ C-6 Reheater Flow Valve HJ Off PI-22-9 Loop 2 Reheater to Breaker
,d-22132 Brkr. A-4 Condenser Block Closed PI-23-2 Breaker HV-2311-2 Brkr. C-5 A Train to Pumpdown Line Closed Breaker HV-2312-2 Brkr B-5 B Train to Pumpdown Line Closed Pumpdown Line to V-23271 B-2 Ventilation Depressurization Close Pumpdown Line to V-23279 B-2 Ventilation Deprdssurization Close
Revision 1
~
9-23-82
- P&I Valve No.
Coord.
Location or Service Position PI-24-1 HV-2401 HJ B-6 Inlet for Pumpdown Line HJ Off PI-31-1 Emergency Condensate V-31239 B-1 Header Isolation Open Emergency Condensate Breaker HV-31191 Brkr A-1 Isolation Closed Firewater to Emerg.
Breaker HV-31122 Brkr A-1 Condensate Header Closed PI-31-2 V-31108 C-6 T-3101 Supply to P-2105/08 Open V-31109 C-5 T-3102 Supply to P-2105/08 Open P-3106 Discharge to Breaker HV-3133-2 Brkr B-1 Energency Header Closed P-3106S Discharge to Breaker HV-3135-2 Brkr B-2 Emergency Header Closed PI-31-3 V-31857 B-1 Deaerator Supply to P-2105 Open PI-41-1 V-41282 C-5 Redundant Tower Makeup Closed Breaker HV-4153 Brkr C-6 Makeup Cross Connect Closed
Revision 1 9-23-82
. P&I Valve No.
Coord.
Location or Service Position PI-41-3 "A" Makeup Pump V-41249 A-6 Disch to Emerg. Mu.
Open "B" Makeup Pump V-41270 B-6 Disch to Emerg Mu.
Open "C" Makeup Pump V-41271 B-6 Disch to Emerg Mu.
Open PI-42-1 LCV-4218-3 V-42129 C-1 Isolation Valve Open LCV-4218-3 V-42130 C-1 Isolation Valve Open
Revision 1 9-23-82
, P&I Valve No.
Coord.
Location or Service Position PI-42-2 Firewater to PCV-4266 HJ C-2 Diesel Engines Handjack Off PCV 4266 Inlet V-45129 B-2 Isolation Valve Open PCV 4266 Outlet V-45127 B-2 Isolation Valve Open Fire Water to V-45807 C-2 "D" Engine Open Fire Water to V-45808 D-2 "C" Engine Open Fire Water to V-45809 C-3 "B" Engine Open Fire Water to V-45810 D-3 "A" Engine Open PCV-4256 Inlet V-4595 B-1 Isolation Valve Open PCV-4526 Outlet V-4596 B-2 Isolation Valve Open
Revision 1 9-23-82 P&I Valve No.
Coord.
Location or Service Position PI-45 P-4501S Disch V-4503 C-6 Isolation Valve Open P-4501 Disch V-4504 C-5 Isolation Valve Open Common Header V-4578 C-6 Main Header Isolation Valve Open V-4581 B-5 Ring Header Isolation Open V-4582 B-5 Ring Header Isolation Open V-4583 B-5 Ring Header Isolation Open V-4584 B-5 Ring Header Isolation Open V-4586 B-5 Ring Header Isolation Open V-4587 B-5 Ring Header Isolation Open V-4588 A-5 Ring Header Isoaltion Open V-4589 A-4 Ring Header Isoaltion Open V-4590 A-3 Ring Header Isolation Open V-4591 A-3 Ring Header Isolation Open V-4592 A-3 Ring Header Isoaltion Open V-4593 B-3 Ring Header Isolation Open V-45112 B-3 Ring Header Isolation Open 4
Revision 1 9-23-82 P&I Valve No.
Coord.
Location or Service Position V-45111 B-3 Ring Header Isolation Open V-45110 B-3 Ring Header Isolation Open V-4585 B-3 Ring Header Isolation Open V-45109 B-4 Ring Header Isolatior.
Open Fire Water Supply V-4525 A-5 to Emergency Cond. Header Closed Fire Water Supply V-45223 A-5 to Emergency Feedwater Header Closed PI-46-2 E-2101/2106/P-2108 V-461633 D-3 Supply Isolation Open PI-46-4 V-461533 B-6 FW to P2108 Open PI-75-9 Control Room Emergency
- Breaker, C-7506 Brkr D-2 Filter Fan Closed