ML20086E282
| ML20086E282 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 01/14/1974 |
| From: | Swart F PUBLIC SERVICE CO. OF COLORADO |
| To: | |
| Shared Package | |
| ML20086E229 | List: |
| References | |
| AO-50-267-74-1, NUDOCS 8312060444 | |
| Download: ML20086E282 (7) | |
Text
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- .' - v Jan. 1k ,197h ABNORMAL OCCURRENCE
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X' I DATE: _
' FORT ST. VRAIN NUCLEAR GENERATING STATION PUBLIC SERVICE COMPANY OF COLORADO P. O. BOX 361 PLATTEVILLE, COLORADO 60651 REPORT NO. 50-26T/74/1 Interim X Final IDENTIFICATION OF OCCURREIICE:
This report is to describe the fuel element descripencies found during inspection associated with Initial Fuel Loading. , This event is considered to be an abnormal occurrence as defined , i in the Technical Specifications, paragraph 2.1F. I CONDITIONS PRIOR TO OCCURRE!CE: Steady. State Power Routine Shutdown Hot Shutdown Routine Load Change Cold Shutdown I Other (specify) Refueling Shutdown Initial Fuel Loading - Routine Startup The major plant parameters at the. time of the event were as follows: Power RTR, N/A MWth ELECT, N/A MWe Secondary Coolant Pressure N/A psig .
*F Temperature N/A _
8312060444 741106 Elov N/A 8/hr. PDR ADOCK 05000267 S PDR
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I . mv Page 2 u f Primary Coolant Pressure N/A psig. Temperature N/A "F Core Inlet
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N/A 'F Core Outlet-Flow N/A #/hr. I DESCRIPTION OF OCCURRENCE: .Ii i During reactor fuel loading at Fort St. Vrain the following fuel ! discrepancies were found: ,
- 1. Six alignment dowel pins were found to be cracked and/or chipped.
- 2. One fuel hole plug that extended above the surface of the el'ement.
- 3. One fuel hole plug was found to be missing.
See Attach =ent "A" APPARENT CAUSE ' OF OCCURRENCE: Design Unusual Service Cond. Including Environ. X Manufacture _ Component Failure Installation /Const. X Other-(specify) Operator Handling in Preparation Procedure for Shipment ANALYSIS OF OCCURRENCE: These discrepancies are being investigated by General Atomic as to the cause of the damage and as to why their Quality Assurance procedures failed l to find them. General Atomic has been requested to provide Public Service Co=peny
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o o Paga 3 l with full information See Attachtent "B". _ f CORRECTIVE ACTION: The six devel pins and out-of-specification Iuel plug were replaced at Fort St. Vrain, using procedures and supervisory personnel supplied by General Atomic. A plug was inserted into the fuel hole which was found to be without one, using a procedure provided by General Atomic. FAILURE DATA /SIMILIAR REPORTED OCCURRENCES: No failures of this type had previcusly been experienced. PROGRAMATIC IleACT: No progra=latic impact vill be experienced insofar as repairs were completed during fuel loading on site. . CODE IMPACT: ; No codes involved! Approvedi b n4a ,. 1 J F/edericE. Swart Superintendent, Fort St. Vrain Nuclear . , Generating Station 13
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- ATTACICSIT "A" Paga 1 of 2 9.72 8.182 ;
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.~ RESERVE SHUTDOWN HOLE
. $ .3. .:.$..h'*,--U.',h,,l'..,ss ..<.
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el' 3 - ' COOLANT HOLE l' ,h, N ~.. ,( ' - 3.,'75 .) ' d
- s, s 0.500 DI A (5)
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s $ . $j s - - CONTROL ROD
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$- CHANNEL (2)
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14.172 - 4.,00 a / FUEL HOLE
/ $g',s 'l,f .sf ,"j ,r0.500 - DIA
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,. 4 (120) e,' .9 7 # f' s
4 g~ b 9[ 'r4#.,, 4, ,..;M, C00LANT s, 4 0.625 01A (52) HOLE
^h s 0 (4) o 4 4 O.740 PITCH A CEHENTED GRAPHITE PLUG (TYP)
I IN 7/8 FUEL HANDLING CLEARANCE PICKUP HOLE l DOWEL PIN s
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$1W::
C W Q*~#.Y-$/ m t _T_ s!, *7. , y $ $ k & <
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S U ' BURNABLE ,. ( . 3.14 POISON ROD- r- D N b [ l COOLANT / s D CHANNEL ' Md' -' s s N FUdL ROD' k . 29.5 IN. s, u
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y LENGTH g ( [ l ! D I ' N s , s N N N l > - DOWEL _2 , _ > > SOCKET SEC A-A t .
, Pig. 3.4-2-Control fuel elements Amendment 15 ,
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COOLANT HOLE 0 0$0S.p$0 .o 4\. e 0.625 DIA (102)
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5 0 9 0 0 6 .'$ ) .s y', COOLANT HOLE O S' O.500 DIA (6) e 0 0 e0060 0 $e sO 'c.s.- a e 6Go oec$ O G i 600 s ese sooooesco eeGooseos? ese e se
- d. i,e c se%<$ .'\es'i S S O . .s e as. ) S ' BURNABLE POISON 14.172 GG9000p 6CH r . b S t' e S N
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'c Sce' HOLE 0.50 IN* DIA (6) ' ; i 0.740 oo 6 %'
PlTCH CO9f00fgcgofg'$*3; 3a @ $ e 0 $ elO-3 0 a ,'. di . FUEL HOLE
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' #. CEMENTED GRAPHITE FUEL-HANDLING I IN. kA.7fg PLUG (TYP) PICKUP HOLE CLEARANCE ,
f h m -> / DOWEL PIN
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r s s ,,, 3 s 31.22 5 ll8 k-: 3 { 't ;
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BURNABLE 4 :: ; D , POISON ROD #
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COOLANT b l ' -; CHANNEL f /g,jf,',jNh f i;. k { g s { { , N \E L s % ; -
.'29.5 FUEL IN.ROD' lgb [h%3 '
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LENGTH M 2h'.
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- SEC A-A. DOWEL - -
- SOCKET (c) . .
u . . Fig. 3.4-1-Fuel eler.ent Amendment 15 U__________-
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L , J.- E. MARTIN PUBLIC SERVICE COMPANY OF COLORADO ' D. W. WAREMSOURG ~ e... . . = ... . ==v==. e o so u . ..=oi j <
- J. CRNiCH -GGA..
- L S. SURT . -
- H. W. HIGHT .: .. *.- . . g ,,,*# 16, 1974
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_ _G* D* /' PROL.l:.'/'n,';.J1
,.. FortrSts
, 931333 Vrain p Unit No. 1 ,
F S \-6 - -- t 3( y3yy .
. = Mr. John Crnich, Project Manager -
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. Culf General Ato=ic '
e P. O. Box 426 ' . Platteville, Colo. 80651 -
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Fuel / Reflector Block-Quality
Subject:
Fort St. Vrain Unit No.1
Dear Mr. Crnich:
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As you.are aware, we have experienced so=e proble=s'vith fuel and _,' reflector elecents which, in our opinion, are related to, or maybe the result of, inadequate quality assurance and/or shop procedures.
. 1. In several instances devels of fuel ele =ents were broken. It
' is difficult for us to determine how this breakage occurred.
It is requested, however, that GGA investigate this =stter in
. . an atte=pt to deter =ine if a shop procedure or a packing and shipping procedure should be changed to prevent this type of damage fron occurring in the. future core ele =ents for Forc St.
Vrain.
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_ , 2. .Several graphite reflector blocks were rejected because of exces-sive da= age. From all indications, this da= age did not occur in ship =ent, which would indicate inadequate inspection prior to shipnent. This, again, appears' to be an area where existing procedures or inspection progra=s are inadequate. It is reques-ted that CGA investigate this matter, address the possible cauces,
,1uid take necessary action to prevent possible- reoccurrence in future ship =ents. i
- 3. 'Almost all of the metal clad reflector blocks were shipped with
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metal burrs, drill shavings, dirt and other foreign =sterial. ; Again it appears that these ele =ents did not receive adequate l inspection prior to ship =ent. It is requested.that GGA inves- ' tigate this =atter,, address the possible causes, and take nece-
, maary action to prevent reoccurrence. -
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y'h 7 Quality
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..'>*,.'* F;rt Sts ,Vrdin Ui No. 1 ,
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4.. On two fuel elements two fuel hole plugs ' vere not in p15ce. Please investigate this catter and address the possible causes and the . action taken to prevent similar reoccurrences. 1
- We would appreciate your review of the abo.fe matters at your earliest
,, convenience. Please address these matters in sufficient detail to include proposed actions taken to permit us to evaluate the causes and the adequacy
. of the corrective action taken. . .
s.:,:. .e. .--
. Very truly yours, .
R 2 9. W a.L w -
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- 1. F. Walker, Vice President Engineering Planning & Analysis RN/bs - -
ec: Director, Quality Assurance - Don Ware = bourg
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