ML20085L634
| ML20085L634 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 05/29/1975 |
| From: | Brey H PUBLIC SERVICE CO. OF COLORADO |
| To: | Howard E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| RO-50-267-75-12, NUDOCS 8311020152 | |
| Download: ML20085L634 (4) | |
Text
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i P. O. Box 361, Plattaville, Colorado 80651 J
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v vs May 29, 1975 b
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G Mr. E. Morris Howard, Director J).
Nuclear Regulatory Comnission Region IV
' r-Office of Inspection and Enforcement
((.,,, T 611 Ryan Plaza Drive Suite 1000 Arlington, Texas 76012 REF: Facility operating License No. DPR-34 DocketNo.50-267[f/s-/2
Dear Mr. Howard:
Enclosed please find one copy each of Abnormal occurrence Report No.
50-267/75/12 (Final) and No. 50-267/75/13 (proliniriary), subnitted per the requirements of the Technical Specifications.
Very truly yours,
'I.
Larry Brey Supurintendant-Operations Fort St. Vrain Nuclear Generating Station HLBlil cct Mr. Angelo Giambusso G
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AkPORT DATE: May 21,1975 ABNORMAL OCCURRENCE OCCURRENCE DATE: May 16, 1975
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FORT ST. VRAIN NUCLEAR GENERATING STATION PUBLIC SERVICE COMPANY OF COLORADO F. O. BOX 361 PLATTEVILLE, COLORADO 80651 REPORT NO. 50-267/75/12 FINAL IDENTIFICATION OF OCCURRENCE:
Engine K-9204-X (B-Engine of 1A Standby diesel generator) became inoperable due to an air-locked fuel system on May 16, 1975.
This is identified as an Abnormal occurrence per Technical Specification 2.1, Paragraph (f).
e CONDITIONS PRIOR Routine Shutdown TO OCCURRENCE:
Steady State Power Hot Shutdown Routine Load Change X
Cold Shutdown other (specify)
Refueling Shutdown Routine Startup The major plant parameters at the time of the event were as follows:
Power
- RTR, O
MWth
- ELECT, O
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Secondary' Coolant Pressure 1125 psig j
l Temperature 210
'F Flow 104.000
- /hr.
Primary Coolant Pressure 391 psig~
Temperature 210
'Fl Core Inlet
.,,_.21,0
'F Core Outlet Flow' 300.000
- /hr.
9 m.
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DESCRIETION OF OCCURRENCE:
"B" Engins was being tested to ensure that it timed out in 45 seconds cranking time if it failed to start. This is an annual test of the timing instruments.
To ensure the engine would not start the actuator output was turned to zero.
After the 45 second cranking was complete, the actuator was reset. The engine however, failed to start, because the fuel system was air-locked.
-APPARENT CAUSE OF OCCURRENCE: _
Design Unusual Service Cond.
Including Environ.
Manufacture Component Failure Installation /Const.
_0ther (specify)
Operator X
Procedure Cranking of the engine at any time with the fuel shut of f introduces the possibility of air-locking the fuel system.
ANALYSIS OF OCCURRENCE:
This is an abnormal occurrence because the engine was not removed from service, and logged as such, during the routine testing.
The engine was, in fact, out of service as soon as the fuel was shut off.
No cicarance was required, so there was no logged indication of the engine being inavailable.
This appears to be a violation of paragraph (g) Section 2.1 of the Technical Specifications.
CORRECTIVE ACTION:
- 1he procedure for checking "overcrank" protection will be developed so that 1.
the fuel is not shut-off.
A log of dicac1 engine unavailability will be kept in the Shif t Supervisors 2.
of fice to ensure compliance with Specification LCO 4.6.1, paragraph (d), sub-paragraph (4).
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FAILURE DATA /SIMILAR REPORTED OCCURRENCES _:
i None PROGRAMMATIC IMPACT!
None CODE IMPACT:
None APPROVED:
REC 0K1 ENDED:
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_ /ederic E. Swart, Supstinterident F
Francis M. Mathic, Superintendent
)(uclear Production Maintenance Fort St. Vrain Nuclear Generating Fort St. Vrain Nucicar Generating Station Station t
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