ML20085L727
| ML20085L727 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 01/31/1975 |
| From: | Swart F PUBLIC SERVICE CO. OF COLORADO |
| To: | Howard E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| Shared Package | |
| ML20085L732 | List: |
| References | |
| AO-50-267-75-2, NUDOCS 8311020389 | |
| Download: ML20085L727 (8) | |
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January 31, 1975 e
es Mr. E. Morris lloward, Director Directorate of Regulatory Operations Region IV, USAEC P. O. Bx 5039 White Settlement, Texas 76108
Dear Mr. Iloward:
REF: Facility Operating License No. DPR-34 Docket No. 50-267 Enclosed please find a copy of Abnormal Occurrence Report No. 50-267/75/2, submitted per the requirements of the Technical Specifications.
Very truly yours, J
su Frederic E. Swart Superintendent Nuclear Production Fort St. VrainNuclear Generating Station FES:il cc:
Mr. Angelo Giambusso o $.f,,
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' REPORT DATE:
1-2 7
ABNORMAL OCCURRENCE OCCURRENCE DATE: 1-13-75 FORT ST. VRAIN NUCLEAR CENERATING STATION PUBLIC SERVICE COMPANY OF COLORADO P. O. BOX 361 PLATTEVILLE, COLORADO 80651
- REPORT NO. 50-267/75/2
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Preliminary
~
IDENTIFICATION OF OCCURRENCE:
The Reactor Building Exhaust Charcoal Filters failed to meet Technical, Specification requirements.-
This has been determined to bh an Abnormal Occurrence per definition 2.1.f of the Technical Specifications.
CONDITIONS PRIOR TO OCCURRENCE:
Steady State Power Reutine Shutdewn Hot Shutdown Routine Load Change X
Cold Shutdown Other-(specify) 4
, Refueling Shutdown
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I Routine Startup The major plant parameters at the time of the event were as follows:
i Power PTR,.
O MWth ELECT,_
O MWe Secondary Coolant Pressur,e N/A Dsig Temperature N/A
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- F' Flow N/A f/hr.
Primary Coolant Pressure.
15 psig 4
i Temperature 120
- F Core Inlet
'120
- F Core Outlet Flow 0
- /hr.
t
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DESCRIPTION OF OCCURRENCE:
SR 5.5.3 alc-A " Reactor Building Exhaust Filter Test" requires that the Reactor Building exhaust filters be tested once per calendar year for efficiency.
The freon leak test portion of the charcoal filters indicated an excessive leak rate through and/or around the charcoal filters.
APPARENT CAUSE
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OF OCCURRENCE:
Design' X
Unusual Service Cond.
Including Environ.
Manufacture Component Failure Installation /Const.
Other (specify)
Operator Procedure All filter units were 11ttea and retested, it was concluded ti.at therc.::
no leakage around the filter units and that the painting and cleanup of the Reactor Building using oil based paint and organic solvents exhausted the charcoal units.
l ANALYSIS OF OCCURRENCE:
Subsequent tests run on samples taken from the charcoal banks indicated the charcoal units to be exhausted. The test were run by a licensed representative of Nuclear Containment Systems, Inc., Columbus, Ohio.
All other aspects of the filter 1
i assembledge were well within Technical Specifications.
l CORRECTIVE ACTION:
"B" and "C" banks of the charcoal filters have been changed out and testing I
performed (1-21-75) by Nuc1 car Containment Systems. Results of the test showed a leak rate less than 1% and an efficiency of 99.99%. The charcoal absorber cells
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Pegu 3 were refilled by Flanders Filters using Barnebey-Cheney M-2200 and NACAR G-617, WO-Oll6 charcaol meeting or exceeding RDT Standard M16-lT " Gas-Phase Adsorbents For"TrappingRadioactivekodineandIodineCompounds," issued by the Division of Reactor Research and Develop.ent, USAEC dated October, 1973.
"A" bank of the Reactor Exhaust Filters (charcoal only) is being refilled by Flandus Filters and will be installed and tested upon completion of the installation.
All painting in the Reactor Building has been completed or teminated and cleaning
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using organic solvents has been halted.
FAILURE DATA /SIMILIAR PIPORTED OCCURRENCES:
None PROGRAFDIATIC IMPACT:
None CODE IMPACT:
None RECOMMENDED:
APPROVED:
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frederic E. Swart
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Supet intende nt-Ope rati{ons Superintendent Nuclear Production Fort St. Vrain Nuclear Fort St. Vrain Nuclear Generating Station Generating Station h
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- @w.'iT DATE:
,1-27-75 i
i ABNORMAL OCCURRENCE OCCURRE';CE DATE: 1-lbl5 FORT ST. VRAIN NUCLEAR CENERATING STATION PUBLIC SERVICE CO:TA';Y OF COLORADO P. O. BOX 361 PLATTEVILLE, COLORADO 80651 REPORT No. 50-267/75/2 Preliminary IDEhTIFICATION OF OCCURRENCE:
The Reactor-Building Exhaust Charcoal Filters failed to meet Technical Specification requirements.
This has been determined to be an Abnormal Occurrence per definition 2.1.f of the Technical Specifications.
CONDITIONS PRIOR TO OCCURRENCE:
Stearly State Power Routine Shutdown Hot Shutdown Routine Load Chr.nge X
Cold Shutdown Other (specify)
Refueling Shutdown Routine Startup The major plant parameters at the time of the event were as follows:
Power
- PTR, 0
'MWth
- ELECT, O
MWe Secondary Coolant Pressure N/A psig Temperature N/A
- F
-Flow N/A f/hr. gD N
Primary Coolant Pressure 15 psig a
Temperature _ 120
- F Core Inlet 120
- F Core Outlet Flow 0
- /hr.
- '"(
c= s= =r.n=A.
d-V Page 2 DESCRIPTION OF OCCURRESCE:
SR 5.5.3 alc-A " Reactor Building Exhaust Filter Test" requires that the Rer.ctor Building exhaust filters be tested once per calendar year for efficiency.
The freon leak test portion of the charcoal filters indicated an excessive Icak rate through and/or around the charcoal filters.
APPARENT CAUSE OF OCCURRE':CE:
Design X
Unusual Service Cond.
Including Environ.
Manufacture Component Failure Installation /Const.
Other (specify)
Operator Procedure All filter units were fitted and retested, it was concluded that there was no leakage around the filter units and that the painting and cleanup.of the Reactor Building using oil based paint and organic solvents exhausted the charcoal units.
ANALYSIS OF OCCURRENCE:
Subsequent tests run on ' samples taken from the charcoal banks indicated the charcoal units to be exhausted. The test were run by a licensed representative of Nuclear Containment Systems, Inc., Columbus, Ohio. -All other aspects of the filter asse=bledge were well within Technical Specifications.
CORRECTIVE ACTION:
"B" and "C" banks of the charcoal filters have been changed out and testing performed (1-21-75) by Nucicar Containment Systems. Results of the test showed a leak rate less than II and an efficiency of 99.99%. The charcoal absorber cells
Page 3
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\\,j were refilled by Flanders Filters using Barnebey-Cheney !!-2200.and NACAR G-617, 10-0116 chaccnol cecting or exceeding RDT Standard 1116-1T " Gas-Phase Adsorbents For Trapping Radioactive lodine and Iodine Compounds," issued by the Division of Reactor Research and Developecnt, USAEC dated October, 1973.
"A" bank of the Reactor Exhaust Filters (charcoal only) is being refilled by Flandus Filters and will be installed and tested upon completion of the installation.
All painting in the Reactor Euilding has been conpleted or teminated and cleaning using organic solvents has been halted.
FAILURE DATA /SIMILIAR REPORTED OCCURRE::CES:
Nonc e
PROGRA>'MATIC IMPACT:
Nonc CODE IMPACT:
None RECOMMENDED:
APPROVED:
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II. Larry lirc6,7
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Frederic E. Swart Superintendcht-Operations Superintendent Nuclear Production Fort St. Vrain Nuclear Fort St. Vrain Nuclear Cencrating Station Generating Station i
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