ML20085M585
| ML20085M585 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 12/15/1975 |
| From: | Hillyard H, Nirschl D, Swart F PUBLIC SERVICE CO. OF COLORADO |
| To: | Howard E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| Shared Package | |
| ML20085M589 | List: |
| References | |
| 50-267-75-18, P-75023, RO-50-267-75-18, NUDOCS 8311090030 | |
| Download: ML20085M585 (4) | |
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puhuc service con.pany *e Cohndo P. O. Box 361, Platteville, Colorado 80651 December 15, 1975 Fort St. Vrain
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Unit No. 1 P-75023 4
(c Mr. E. Morris Howard, Director y
Nuclear Regulatory Commission 2
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Region IV J'/
Office of Inspection and Enforcement
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_I Suite 1000
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Arlington, Texas 76012 9
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Facility Operating License No. DPR-34 Docket No. 50-267
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Dear Mr. Howard:
Enclosed please find a copy of Unusual Event Report No. 50-267/75/18A, Final, submitted per the requirements of the Technical Specifications.
Very truly yours,
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Frederic E. Swart Superintendent, Nuclear Producti'on Fort St. Vrain Nuclear Generating Station FES/alk cc:
Mr. Roger S. Boyd oule t etN1 itEGION '
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o REPORT DATE:
December 15, 1975 UNUSUAL EVENT 75/18A OCCURRENCE DATE:
September 24, 1975 IDRT ST. VRAIN NUCLEAR GENERATING STATION PUBLIC SERVICE COMPANY OF COLORADO P. O. BOX 361 PLATTEVILLE, COLORADO 80651 REPORT NO. 50-267/75/18A FINAL IDENTIFICATION 0F OCCURRENCE:
While removing the boron carbide balls from the Reserve Shutdown hopper assembly of control rod drive, serial number 28, core region 13, it was noted that there was a light deposit of white crystals on the surface of several of the balls.
This was identified as an unusual event per ADM 31, Attachment 4.1, II.C.
CONDITIONS PRIOR TO OCCURRENCE:
Steady State Power Routine Shutdown 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:
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Power RTR 0~
MWth ELECT 0
NWe Secondary Coolant Pressure N/A psig Temperature N/A
- F Flow N/A f/hr.
Primary Coolant Pressure O
psig Temperature 120
- F Core Inlet l
120
- F Core Outlet Flow 1 circulator at 4,000 RPM f/hr.
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UNUSUAL EVENT 75/18A Page 2 of 2 DESCRIPTION OF OCCURRENCE:
As stated in the attached report, " Status Report on Reserve Shutdown System",
by General Atomic Company Staff, November, 1975; GA-A 13742.
APPARENT CAUSE OF OCCURRENCE:
As stated in the attached report, " Status Report on Reserve Shutdown System",
by General Atomic Company Staff, November,1975; GA-A 13742.
ANALYSIS OF OCCURRENCE:
As stated in the attached report, " Status Report on Reserve Shutdown System",
by General Atomic Company Staff, November,1975; GA-A 13742.
CORRECTIVE ACTION:
Since the capability of the system or related systems is in no way effected, no further corrective action will be taken.
FAILURE DATA /SIMILAR REPORTED OCCURRENCES:
None PROGRAMMATIC IMPACT:
None CODE IMPACT:
None r.
Submitted by:
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l Harvey N. Hillfard, Jr. /
Technical Services Supervisor l
I Reviewed by:
e Dick Nirschl GAC' Fuels Division Representative 1
Approved by:
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>. M tu n F ederic E. Swart I
uperintendent, Nuclear Production
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IMUSUAL EVENTS AND ABNORMAL OCCURRENCE REPORTS DISTRIBtTTIONS Number of Copips San Francisco Operations Office ERDA 1333 Broadway Oakland, California 94612 Attna K2 nager 2*
California Patent Group la Division of Reactor Research and Development ERDA Washington, D.C.
20545 Attnz Director le Asst. Dir. for Cas Cooled Reactor Projects 2*
Asst. Dir. for Engrg. and Technology 1*
Asst. Dir. for Reactor Safety 1*
ERDA-SCRPO-SD 18 F. O. Box 81325 San Diego, California 92138 Project Engineer 1*
ERDA - SCRPO F. O. Box 1446 Canoga Park, California 91304 Address ~ Director 1
Letter ERDA - SCRPO To F. O. Box 1446
,Canoga Park, California 91304 Technical Information Center 3e IRDA F. 0. Box 62 Oak Ridge. Tennessee.37830 Address ~ John M. Waage', Project Manager 10*
FFLG General Atomic Company To P. O. Box 81608 San Diego, California 92138 Address - Mr. E. Morris Howard, Director Letter Region IV, To Office of Inspection & Enforcement Nuclear Regulatory Cosrnission 611 Ryan Plaza Drive Seite 1000 Arlington, Texas 76012 Director of Nuclear Reactor Regulation 1 (copy of Howard's letter &
Atta: Mr. Roger S. Boyd, Acting Director asilogram)
Division of Reactor Licensing U. S. Nuclear Regulatory Commission Washington, D.C.
20555 Secretary, NFSC, Belleview 1
Tice President, Engineering & Planning, 39th Avenue Engineering 1
Manager of Production (Chairman, NFSC), Belleview 1
Director Quality Assurance 1
Technical Services Supervisor 1
Superintendent, Nuclear Production 1
1 Superintendent. Operations 1
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Training Coordinator 1
1 FORC Committee 1
l Technical Services Files 1
1 Training Review 6
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- Indicates a zerox copy of the letter to the Director ERDA-SCRPO, is sent with the copies l
of the report.
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