ML20115A933
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No.
57 Date 6h /72 1.-
1-l DIFICTORATE OF FIGULATORY OPERATIONS
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j \\ -[, ( io NOTIFICATION OF AN INCIDENT OR OCCURRENCE m
Facility:
Consolidated Edison Co=pany (Indian Point 2) 5 f
Problem:
4 During initial testing of the control rods at operating temperature conditions, mechanical binding problems were experienced vith three control rods. The control rods in the Indian Point 2 reacter are simi-lar to those used in other present generation Westinghouse reactors and co= prise a group of individual neutron absorber rods fastened at the top end to a coccon spider assembly. The neutron absorber rods move up and down in absorber rod guide sheatho that are an inte5ral part of each fuel assembly. The enclosed sketch shows n' typical control red-fuel element assembly.
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.,.,..c During an AEC inspection on May 26 our inspector confirmed that Con Ed's investigation of these problems revealed thet ene of_the control roda vas sticking due to the presence of a;foxeign[ object within the[absorbe(]. _
rod guide cheath.
The interference experienced with the othergtvo' con ~'" e trol rods vas fourd to have resulted f.ra=. insufficient clearances'betwee'n' the absorber rods and their respecti'fel' guide sheaths in the lods'1)'
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inches of the cheath. Con Ed and Westin6 house initiated a detsiled' inspection of four fuel asse=tlies, includinE the three that vere binding.
Measurements of the inner diameter of the absorber rod guide sheathe confimed dimensions less than the specified design ninimu= di=ension in t
the lover 19 inches of the guide sheath. ' Based on these findings,,
con Ed and Westinghouse concluded that-inspection of all fuel"assehblifs was appropriate and began defueling the. reactor on May 26. The extent of the delay in the co:pletion of the plant,_ if any, is not known:at.
l this time.
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Action:
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RO inspectors and a RO consultant have,ccheduled an incpecticb on '
June 2,1972 to review this problem.
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The staff of the,vAnt Ccrsittee on Ato:ic Inergy and the AEC Public
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Infomation Office in'Wechington,' D. C. are being ini'ormed 'by copy of
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this notification.
The AEC public Relations Cfficer for the New York area was notified by telephone.
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The state of New York was notified by telephone.
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No.
57 2-Date 6/1/72 e
conteet:
Further Information on this problem can be obtained frcrn:
F. J. Nolan
- X7421 J. G. Keppler -
- X7h21 j
R. R. Engelken - XT356 Distribution:
4 Chair an Schlesinger J. A. Harris, FI D. F. Knuth, L Comissioner Ramey J. D. Anderson, INS R. R. Maccary, L Cocnissioner Johnson M. Biles, OS R. L. Tedesco, L Cor..issioner Larson
_ R. F. Fraley, ACRS (3)
R. R. Denton, L Coe:aissioner Doub
- L. R. Rogers, RS D. A. Nusbat=er, L L. M. Muntzing, DR J. J. Davis, RS R. E. Cunningham, L E. J. Bloch, DDR R. B. Minogue. P.S L'. D. Lov,.RO C. K. Ieck, DML E. J. Bloch, L S. H. Ranauer,'DETA
-S. G. Case, L
- L. Kornblith, Jr., RO P. A. Morris, RO C. L'. Renderson, DRA J. Eendrie, L
' R..H. Engelken, 30
'Vv Gilinsky, DR 1,,
A. Giambusso, L R. D. O't;eill, OCR E. J. Bauser, JCAE R. Schroeder, L
- G. A. Arlotto, RS GeneralManager(2)
S. H. Ec.iley, Il S. Levine, OEA J. H. Rubin, AGM R. S. Boyd, L X. Goller, L' GeneralCounsel(2)
R. C. DcYoung, L RO Regional Offices-i Secretary (2)
D. J. Skovbolt, L' DR Reading File J. Fouchard, PI D. R. Muller, L REG' Central File M. Shav, RDT I
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'l FIGURE 3.8 R00 CLUSTER' CONTROL. ASSEMBLY--
i 3-11.