ML19322D340

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Nonproprietary Version of Memo Re Defective Welds in Neutron Shield Tank.Welds Pose No Threat to Public Safety.No Evidence Exists Supporting Allegation That Attempt Made to Conceal Defects.File Closed
ML19322D340
Person / Time
Site: Surry Dominion icon.png
Issue date: 01/25/1977
From: Mctiernan T
NRC OFFICE OF INSPECTOR & AUDITOR (OIA)
To: Volgenau E
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
Shared Package
ML19322D327 List:
References
FOIA-79-416 NUDOCS 8002110516
Download: ML19322D340 (5)
v • d • e


Text

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Ernst.Volgenau, Director, IE.

FROM:

Thomas J. lETiernan, Director, DIA..

SURRY UNIT NO..l. NEUTRON SHIFLD TANK.

SUBJECT:

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l P.eference is made to our prior encorandum concerning.this. subject, dated December 10, 1976, and your wply.. dated January 14,1977. Although our information concerning defective welding related to Unit.No.1, your rcply related 'to Unit No. 2, as.well as No.1.

Based upon your reply of January 14, 1977, we have concluded that in the view of your office, as concurred in by HRR, there is no threat to public health.and. safety by the possible existence of_ defective welds in the. neutron. shield tank '

of Unit No.1.

!!c also conclude that welding defects in the. tank, were. detected and reported by Region II inspectors, ir.cludingQgMnand.that.there

-H is no evidence to support the allegation that an attempt.vas.tnade to.

'i conceal the existence of these. defects.

Accordingly, we are closing our. file.in this matter....

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Thomas J. McTiernan, Director'........

Office of Inspector and Auditor. J.

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4 DISTRIBUTION:

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OlA subject:

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E DIA Reading 4

Ryan Reading i

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CONTACT:

William E. Ryan, DIA 49-27170 DIA OIA A

RYAN/rit GAbston T ernan

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e eo Attachments:

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1.

Drawing of AP&L. backing strip.

2.

C0 Rpt. fio. 50-313/69-5 (p.3) w/ notes 3.

l'emo fm O'Reilly to Sr. Reactor Inspectors dtd 11/3/69 4.

Chicago Bridge & Iron Co. transmittal 5.

Varela's notes dtd 3/22-25/70 l'emo fm Varela toc 3_Md 4g70 w/ attached page for monthly 6.

summary reportedly written byC;p1.pm 7.

Varela's draft rpt dtd 12/17/69 (pp. 1, 2, 8-10, 12-18)

T l'emo fm Varela toe}y, undtd (p.1 only) w/ attached p. 4 8.

" official rpt bi't' 9.

Memo to Q Wtd 12/23/69 (p.1 only') w/ notes 10.

Varela's draft Feeder Rpt dtd 11/19/69 11.

Drawing of welds (2 pp.)

Memoio[pdtd 1/23/70 (2 cys of p.1 only w/various notes) 12.

13.

C0 Rpt flos. 50-280/69-8, 50-281/59-3 (p. 7) w/ notes

14. C0 Rpt lios. 50-280/70-1, 50-281/70-1 (p. 3) w/ notes

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15. Pictures of tarik w/ notes, undtd and attached Form U-l (back) 7

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16. Pictures of shield w/ notes dtd 2/20/70 3

Ltr fm Varela to Volaenau dtd 5/9/77 w/outgoina dtd 4/29/77 17.

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r Attachments:

1.

Drawing of AP&L' backing strip.

2.

C0 Rpt. No. 50-313/69-5 (p.3) w/ notes 3.

Memo fm O'Reilly to Sr. Reactor Inspectors dtd 11/3/69 4.

Chict.go Bridge & Iron Co. transmittal 5.

Varela's notes dtd 3/22-25/70 6.

Memo fm Varela to M dtd 4/10/70 w/ attached page for monthly summary reportedly written by M 7.

Varela's draft rpt dtd 12/17/69(pp.1,2,8-10,12-18) 8.

Memo fm Varela to undtd (p. 1 only) w/ attached p. 4 of

" official rpt by '

9.

Memo t 6 dtd 12/23/69 (p. 1 only) w/ notes 7

10. Varela's draft Feeder Rpt dtd 11/19269 11.

Drawing of welds (2 pp.)

12. Memo to Boyd dtd 1/23/70 (2 cys of p. 1 only w/various notes)
13. C0 Rpt Nos. 50-280/69-8, 50-281/69-8 (p. 7) w/ notes

- 14.

C0 Rpt Nos. 50-280/70-1, 50-281/70-1 (p. 3) w/ notes

' 15. Pictures of tarik w/ notes, undtd and attached Form U-l (back)

16. Pictures of shield w/ notes dtd 2/20/70
17. Ltr fm Varela to Volgenau dtd 5/9/77 w/outgoina dtd 4/29/77 l

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NO RECOR D OF E ngl N E~E Rl NG APP R'0VA L' POR. TW E RE'MOVAL OF THE BACKI NG.STRl.'P i.

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. C0 Ept. No. 50-313/69-3.

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Supple = cat No.14,Section V. v'as revicued subsequent to the

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inspection end does indeed correct the listed conconformance

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.I ite=s. The above nonconformanco items are considered resolved i

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The liner assc=bly joint there the 1/4-inch clate is velded to,

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the 1/2-inch knuckla scetion does not h.-va a backing strip as i[

h shown on Supplescat No. 4, Figarc'11.2.25-1 of the PSAR. _M j,4 1,

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46_C; ?hemym'hicm_coachis.ix esctor, but is considered.

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as a ccvistion from tbc PSAR only. APE.L states that the discrcpsney i-

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' vill be corrected by PSAR supolc=cnt as the above items vera corrected..

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This inspection finalized the QC inspections of APE concreting, 4505.04 and.05.

Futura inspection efforts vill be directed

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j' in =ccordanca with PI 3800/2, dated August 20, 1969, Section E.5.f.

(See Appendix I.)

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.b Previous CO:II Renort No. 50-313/69-4 st ted that concreto design -

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mix for the base slab would be D1, D2. This was in error. The 3

actual nix was as per thic recort, C1, C2.

(See Aopendix I.)

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Prestressed concrete tenden sheathing is to be galvanized spiral

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g vound tubing. (Sca Appendix II.)

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AP&L/De htel welding QA/QO was considered to b'o adequata during

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this early contact. (See Anpcudix III.,)

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Correctiva fitup and welding procedures vera absent frcca Bechtcly>'

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' welding crogram, but APE 1 h:s taken the por,ition that correctiva

/pp S) qualified procedures cud percor:pel will be on board before that 1:

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type of work com:nences. (Scc Appmdir III.)

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Liner olate is not marked as required per ASTM A20. AP&L bas

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Shop sandblasting and painting of the linct p1'cto asse=blics as

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rcquired by the PSAR were a:Itted and is contracted to be accom-i,

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. p11shed onsite. (See Apocndix III.)

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No insgcetion was required of the general surfaces of the liner 1. l

<N N plate prior to cone' cting or paintinn. AP&L b s teken a position 1: '

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$Q t inspection vill be required and defects rop fred. (See

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