ML20066K117
| ML20066K117 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 09/10/1982 |
| 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-82381, NUDOCS 8211290382 | |
| Download: ML20066K117 (14) | |
Text
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.g Public senice company ce odomde 16805 WCR 19 1/2, Platteville, Colorado 80651 l.bhh.. [lNIbb September 10, 82
- P Fort St. Vrain
- O SEP 2 0 GS2 unit #1 P-82381 Lu 6
Mr. John T. Collins, Regional Administrator U. S. Nuclear Regulatory Commission 611 Ryan Plaza Dr., Suite 1000 Arlington, TX 76012
SUBJECT:
Dear Mr.' Collins:
The requirements of NUREG 0737 Article I.C.6 specify an independent check of equipment status when critical equipment is returned to service.
The equipment involved are structures, systems and components required for a safe shutdown of the plant as described in Table 1.4.2 of the FSAR. An evaluation (Attachment 1) was made to determine what is necessary to assure availability of this equipment if it is required to operate.
Most of this safe shutdown equipment is verified to be in the proper condition / position by virtue of normal plant operation.
There are, however, certain other " critical" equipment items that do not fall into this category and the operating condition / position of this equipment will be independently verified upon return to service following " clearance" conditions.
A tabular list of this equipment is provided as Attachment 2.
In addition to this list, manual valves of the reserve shutdown system, which are a part of the " sealed valve list", will be independently verified upon return to service.
The " clearance procedure" will be modified to include a reference to this critical equipment.
This modified procedure will insure that involved personnel are made aware that an independent check is required and the condition / position required upon return to service.
The critical equipment will also be marked such that it will be obvious to involved personnel that this equipment is unique and will require the independent check.
Independent checks may be accomplished only by those personnel deemed r
qualified by virtue of their operations or maintenance experience.
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s 8211290382 021118 a
DR ADOCK 05000267 5'
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, The following personnel are deemed qualified to verify all equipment condition / position.
All Licensed Personnel Equipment Operators Auxiliary Tenders Personnel referred to as " maintenance foreman" in the equipment clearance procedure who are qualified to request, check and hold clearances may veri fy equipment condition / position upon return of their clearance.
The modified clearance procedure will be implemented and the critical valves marked by September 30, 1982.
The method of marking will be similar to that presently used for " sealed valves".
Very truly yours,
?t' TV" n,
on W. Warembourg v
Manager, Nuclear Production Fort St. Vrain Nuclear Generating Station DWW/skr Attachments cc: Bob Clark G. Kuzmycz B. Grimes
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\\ 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) 1.
Valves installed in the Reactor Building above the refueling floor or in the Turbine Building above the operating floor.
Therefore, they are not applicable.
2.
The PCRV, its support structure and internals including the reactor core, core support structures, the economizer eva orator-superheater of one steam generator, one helium r
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 t.> assure this capability.
Procedures applied to sealed valves ata at least as restrictive as those governing critical valves.
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 emergenc:
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.
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1 1
1 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 reheatars 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.
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6.
The circulating water make up system is the same for normal as for safe shutdown cooling. Valves of the redundant flow path are considered critical valves.
The cross connect is considered
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critical.
E 7.
Service water system is the same for normal as for safe shutdown s s cooling except for the emergency makeup valve station which is required to be operable.
8.
All items of this category are considered.
(See item number 3.)
9.
Reactor plant cooling water operation is the same for normal as for shutdown cooling.
110. The fuel storage facility cooling is the same for normal as for safe shutdown cooling.
- 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 for safe shutdown cooling.
- 13. Standby electric generators are functic, ally tested following completion of work.
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. 14. The station battery operation is the same for normal as for safe shutdown cooling.
- 15. Portions of the plant protective system required to be operable during safe shutdown cooling are also required to be operable at power.
- 16. The Control Room emergency filter fan is considered to be critical equipment.
17.
Instrument and control sy stems,
instrument air systems and hydraulic systems are the same for normal or is desirable for safe shutdown cooling.
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1
- P&I Valve No.
Coord.
Location or Service Position j
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 B-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 A
PI-21-5 V-211615 A-5 Loop 1 Pelton Supply Open V-211616 A-5 Loop 2 Pelton Supply Open
4 a
.P&I Valve No.
Coord.
Location or Service Position PI-21-6 LV-21130 HJ B-4 T-21110 Emergency Drain 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 HJ Off HV-2110-2 HJ A-3 C-2103 Pelton Return HJ Off V-21963 B-6 T-2113 Discharge Isolation
-Open i
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 E
, 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 s
PI-22-3
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Emerg. Cond. to Loop I B'reaker HV-2291 Brkr. C-5 Reheater Block Closed Emerg. Cond. to Leap I FV-2239 HJ C-6 Reheater Flow Valve HJ Off
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, 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 to 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 HV-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 Depressurization Close l
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, 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 E eaker HV-31191 Brkr A-1 Isolation C osed 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 Emergency 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
, 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
, 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 0-3 "A" Engine Open PCV-4256 Inlet V-4595 B-1 Isolation Valve Open PCV-4526 Outlet V-4596 B-2 Isolation Valve Open
l F&I Valve No.
Coord.
Location or Service Position PI-45 P-4501S Disch j
V-4503 C-6 Isolation Valve Open 3
P-4501 Disch V-4504 C-5 Isolation Valve Open Common Header V-4578 C-6 Main Header Isolation Valve Open i
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 i
i V-4586 B-5 Ring Header Isolation Open i
V-4587 B-5 Ring Header Isolation Open l
V-4588 A-5 Ring Header Isoaltion Open V-4589 A-4 Ring Header Isoaltion Open
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V-4590 A-3 Ring Header Isolation Open V-4591 A-3 Ring Header Isolation Open i
l V-4592 A-3 Ring Header Isoaltion Open V-4593 B-3 Ring Header Isolation Open V-45112 B-3 Ring Header Isolation Open l
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, 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 Isolation Open
- V-4536 B-5 Pts Plant Valve 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 4
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 Also on sealed valve list.