ML20085M585

RO 50-267/75/18A:on 750924,while Removing Boron Carbide Balls from Reserve Shutdown Assembly of Control Rod Drive, Serial Number 28,core Region 13,light Deposit of White Crystal Noted on Surface of Several Balls

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: A13742, Status Rept on Reserve Shutdown Sys ML20085M585 ML20085M594
References
50-267-75-18, P-75023, RO-50-267-75-18, NUDOCS 8311090030
Download: ML20085M585 (4)

Text

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o o puhuc service con.pany *e Cohndo P. O. Box 361, Platteville, Colorado 80651 December 15, 1975 Fort St. Vrain [

Unit No. 1 P-75023 #

4 (c Mr. E. Morris Howard, Director y Nuclear Regulatory Commission _ ,;'.,

Region IV 2' O /S/

y"',7J'*/> .g hj Office of Inspection and Enforcement *D,j* " J'/

Suite 1000 _I

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Arlington, Texas 76012 9 . ;f ,

REF: 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,

[

h' 6[*b' vfN j i Frederic E. Swart  !

Superintendent, Nuclear Producti'on Fort St. Vrain Nuclear Generating Station FES/alk cc: Mr. Roger S. Boyd oule t etN1 itEGION ' -

PJTe8FdBhapg 80 S

o c .. 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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O UNUSUAL EVENT 75/18A

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. I DESCRIPTION OF '

OCCURRENCE: l 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 <-

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! Submitted by: / .

l Harvey N. Hillfard, Jr. /

Technical Services Supervisor ,

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Reviewed by: e I Dick Nirschl GAC' Fuels Division Representative 1

Approved by: z$<- > . M tu n F ederic E. Swart I -

uperintendent, Nuclear Production

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. O O 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 '

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. 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 )

Training Coordinator 1 1

, FORC Committee 1 l 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 l of the report. I J

1 1

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