ML20002C884
| ML20002C884 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 12/26/1980 |
| From: | Warembourg D PUBLIC SERVICE CO. OF COLORADO |
| To: | Eisenhut D Office of Nuclear Reactor Regulation |
| References | |
| TASK-2.K.3.17, TASK-TM P-80441, NUDOCS 8101120284 | |
| Download: ML20002C884 (7) | |
Text
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W puhuc sente company e cdonde
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.; i uJ PLATTEVILLE, COLOR ADO 80651 n
December 26, 1980 Fort St. Vrain Unit No. 1 n
P-80441 Mr. D. G. Eisenhut, Director Division of Licensing U. S. Nuclear Regulatory Commission Washington, D.C. 20555 Docket No. 50-267
Subject:
Report on Outages of of Emergency Core Cooling System
Reference:
Letter from D. Eisenhuc to All Operating Reactor Licensees Dated May 7,1980 (G-80104)
Dear Mr. Eisenhut:
In the ref erenced correspondence regarding Five Additional TMI-2 Related Requirements to Operating Reactors, it was stated in the Implementation Schedule and Summary that Item II.K.3.17 also applies to Fort St. Vrain.
The following reiterates the NRC position on that item and provides the Public Service Company of Colorado response.
Item II.K.3.17 - REPORT ON OUTAGES OF EMERGENCY CORE COOLING SYSTEMS LICENSEE REPORT AND PROPOSED TECHNICAL SPECIFICATION CHANGES NRC Position l
Several components of the ECC systems are permitted by Technical Specifications to have substantial outage times (e.g., 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> for one diesel generator; 14 days for the HPCI system).
In addition, there are no cumulative outage time limitations for ECC systems. Licensees l
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December 26, 1980 Mr. D. G. Eisenhut j
should submit a report detailing outage dates and lengths of outages for all ECC systems for the last five years of operation. The report j
should also include the causes of the outages (e.g., controller failure,
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spurious isolatior0 PSC Response i
l Fort St. Vrain being a High Temperature Gas Cooled Reactor (HIGR), does not have nor require the emergency core cooling (ECC) systems which must be pro-l vided for light water reactors. The Fort St. Vrain Technical Specifications which pertain to systems which provide emergency core cooling do not permit l
substantial outage times for any equipment required for emergency core cooling except for the standby diesel generators (System 92) which have a seven (7) j day limit--total for both units--during any month. The Technical Specifica-tion for the prestressed concrete reactor vessel (PCRV) cooling system (System 46) allows up to 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> with only one complete operating loop in i
service.
l The information requested by the NRC Position statement is contained in Table 1 which lists the outages for System 92 for the five year period from June,1975, to July, 1980.
i l
The review of information researched on System 46 for the same time period did not disclose any outages of one complete operating loop under the i
l provisions of the Technical Specification.
As the equipment used for emergency core cooling is also used during normal plant operation, this equipment must be operable for continued power opera-tion. The reliability and performance of all this equipment is continuously demonstrated by normal plant operation. Decay heat removal is effected by i
operation of one or more of the four helium circulators and either or both of I
the separate steam generator sections (economizer-evaporator-superheater sections
(
and/or the reheater section) in either or both of the loops, Based on the unique design of Fort St. Vrain and the associated system require-i ments for emergency core cooling systems which are reflected in the existing Technical Specifications, no changes are being proposed, i
If you have any questions, please contact Mr. J. W. Gahm (303) 785-2224.
Very truly yours,
[
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Don Warembourg Nuclear Production Manager DW/sb Attachment
Outage Ou tage Duration Cause of Component Corrective Start End of Outage Ou ta ge Involved Action Taken SYSTEM 92 OUTAGES L
1975
- No outages during power operation this year.
1976 Emergency Generation Unit A 4
0830/
1510/
Emergency 7-10-76 7-10-76 0.28 Day Inspection Generator A N/A 0745/
2235/
Emergency 7-12-76 7-12-76 0.62 Day Inspection Generator A N/A 0700/
1320/
Emerger.cy Cleaned fouled heat 7-13-76 7-14-76 1.26 Day Surveillance Generator A exchangers.
1 0930/
1010/
Install Switch Emergency 7-28-76 7-28-76 0.03 Day Guard Generator A N/A Emergency Generator Unit B 0630/
1130/
Emergency 7-15-76 7-15-76 0.21 Day Inspection Generator B N/A 1035/
1140/
Install Switch Emergency 7-28-76 7-28-76 0.05 Day Guard Generator B N/A en 18 g 1977 r.@.
oI Emergency Generator Unit A
"'S vi t
0730/
1300/
Emergency 1-24-77 1-25-77 1.23 Day Inspec tion Generator A N/A i
I
Outage Outage Duration Cause of Component Corrective Start End of Outage Outage Involved Action Taken l
0730/
1330/
Emergency 9-26-77 9-27-77 1.25 Day Inspection Generator A N/A Emergency Generator Unit B 0815/
0750/
Emergency 10-18-77 10-21-77 3.00 Day Inspection Generator B N/A 1978 Emergency Generator Unit A 0730/
1430/
Emergency
- I 1-10-78 1-11-78 1.29 Day Inspec tion Generator A N/A 0730/
0820/
Emergency 1-17-80 1-19-80 1.03 Day Inspection Generator A N/A 1
0730/
1530/
Emergency j
8-25-78 8-25-78 0.33 Day Inspection Generator A N/A 0730/
1430/
Emergency 8-29-78 8-31-78 2.29 Day Inspection Generator A N/A 1345/
1505/
Emergency 12-16-78 12-16-78' O.33 Day Cleaning Generator A N/A 0730/
1050/
Engine Cooling Diesel 8-9-78 8-9-78 0.14 Day System Leak Engine A Welded cracked line.
1145/
1400/
Generator A 1-11-78 1-11-78 0.09 Day Inspection Breaker N/A EN
$E 0830/
1345/
Tagged Out Generator A Tagged breaker open for w
8-8-78 8-8-78 0.22 Day for Protection Breaker work on transformer.
o-g 0800/
0955/
Air Start Diesel 4-28-78 4-28-78 0.08 Day System Leak Engine B Repaired oiler.
1 Outage Ou tage Duration Cause of Component Corrective Start End of Ou tage Ou tag e involved Action Taken Emergency Generator Unit B 1410/
1515/
Emergency 1-11-78 1-11-78 0.05 Day Inspection Generator B N/A 0730/
1645/
Emergency 4-4-78 4-4-78 0.39 Day Inspection Generator B N/A 0730/
1807/
Emergency 4-5-78 4-5-78 0.44 Day Inspec tion Generator B N/A 0630/
1442/
Emergency 6-27-78 6-30-78 3.34 Day Inspection Generator B N/A 0730/
1530/
Emergency 8-25-78 8-25-78 0.33 Day Inspec tion Generator B N/A 0803/
1530/
Emergency 9-1-78 9-1-78 0.31 Day Inspection Generator B N/A 0630/
1330/
Emergency 9-5-78 9-5-78 0.29 Day Inspec tion Generator B N/A 0800/
0900/
Emergency 12-19-78 12-19-78 0.04 Day Cleaning Generator B N/A 1979 Emergency Unit A 0730/
1530/
Upgrade Pipe Emergency Replaced fittings with jfff 8-8-79 8-8-79 0.33 Day Fittings Cenerator A correct code quality, eg wg 0830/
1130/
Emergency oa 10-10-79 10-10-79 0.13 Day Cleaning Generator A N/A
[E-
s Outage Outage Duration Cause of Component Corrective Start End of Outage Outage Involved Action Taken Emergency Generator Unit B 1050/
1330/
Emergency 8-15-79 8-15-79 0.11 Day Inspec tion Generator B N/A 0830/
1130/
Emergency 10-10-79 10-10-79 0.13 Day Cleaning Generator B N/A 1300/
1505/
Room Venti-10-23-79 10-23-79 0.09 Day Inspection lation Sys-tem N/A 1980 i
Emergency Generator Unit A 1030/
1318/
Emergency 3-27-80 3-27-80 0.12 Day cleaning Generator A N/A 0610/
0745/
Emergency 5-15-80 5-15-80 0.07 Day Cleaning Generator A N/A 0730/
1600/
Pipe Hanger Emergency 5-28-80 5-28-80 0.35 Day Upgrade Generator A N/A 0300/
1800/
Emergency 7-7-80
'7-12-80 5.63 Day Inspection Generator A N/A 0750/
1430/
Pipe Hanger Emergency 7-13-80 7-17-80 4.28 Day Upgrade Generator A N/A
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Ou tage Outage Duration Cause of Ccmponent Corrective Start End of Outage Outage Involved Action Taken Emergency Generator Unit B 1410/
1600/
Governor Emergency 3-18-80 3-18-80 0.08 Day Erratic Generator B Repaired governor.
0730/
1022/
Emergency 3-27-80 3-27-80 0.12 Day cleaning Cencrator B N/A 0935/
1145/
Emergency 5-15-80 5-15-80 0.09 Day Cleaning Generator B N/A 0730/
1650/
Pipe Hanger Emergency 5-30-80 5-30-80 0.39 Day Upgrade Generator B N/A 0909/
1400/
Emergency 6-4-80 6-5-80 1.20 Day Inspec tion Generator B N/A 1130/
1605/
Emergency 6-9-80 6-9-80 0.19 Day Test Generator B N/A
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