ML17296B333
| ML17296B333 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 04/10/1981 |
| From: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Spencer G NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, ANPP-17758-BSK, NUDOCS 8104200289 | |
| Download: ML17296B333 (8) | |
Text
REGUl ORY INFORMATION DISTRIBUT I SYSTEM (RIDS)
ACCESSION NBR:8104200289 DOC>>DATE: 81/04/10 NOTARIZED>> NO,,
DOCKET FACIL;:STN"50"529= Palo Verde, Nuclear Station<
UnitI 2E Ai izona Publi 05000529 AUTH ~ NAME" AUTHOR AFFILIATION, VAN BRUNT'iK;ED Arizona. Public Service.
Co ~
REC IP>>NAME~
RECIPIENT'FFIL'IATION, SPKNCERgG,ST Region-5~
San Franciscor Reactor Construction 8 Eng,ineer
SUBJECT:
- Second-interim: deficiency rept're concrete void: in> control bldg sump'nitially reported. on 801125,Caused.
by lack of complete: concrete consol, <dation duel to reinforcement". ste'el density. Repairs underway, Final rept by 810815"..
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TITLE". Construction Deficiency Report (10CFR50
~ 55E)
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'HOENIX'RIZONA85036 April 10, 1981 U.
S. Nuclear Regulatory Commission Region V
Walnut Creek Plaza Suite 202 1990 North California Boulevard Walnut Creek, California 94596 ANPP-17758-BSK/JAR g~
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Attention:
Mr.. G.
S. Spencer, Chief Reactor Construction and Engineering Support Branch
Subject:
Interim Report A 50.55(e) Potentially Reportable Deficiency Relating to a Concrete Void in Unit //2 Control Building Sump File:
80-019-026 D.4.33.2
Reference:
'(1) Telephone Conversation between J. Eckhardt and B. S. Kaplan on November 25, 1980 (DER 80-37)
(2) Interim Report ANPP-16957-BSK/JAR, dated December 24, 1980 (3) Letter ANPP-17357-BSK/JAR, dated February 24, 1981
Dear Sir:
The NRC was notified of a potentially reportable deficiency in the referenced telephone conversation.
References (2) and (3) transmitted interim reports which estimated completion of the investigation on April 15, 1981.
Due to the extensive investigation and evaluation required, a second interim report is attached.
It is now expected that this information will be finalized by August 15, 1981, at which time a complete report will be submitted.
EEVBJr/BSK:skc
'Very truly yours,
(.(v M~
APS Vice President Nuclear Projects ANPP Project Director Qo(g 5
(/i Attachment s104200 gW.
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U. S. Nuclear Re atory Commission Attention:
Mr. G.
S.
Spencer ANPP-17758-BSK/JAR April 10,.1981 Page 2
CC'ictor Stello, Jr., Director Office of Inspection and"Enforcement U. S. Nuclear Regulatory Commission Washington, D.
C.
20555 A. C. Gehr Snell
& Wilmer R. L.
D. B.
W. E.
J.
M.
A. C.
W. H.
W.
G.
W'. J.
R. L.
R.
W.
R.
M.
D. R.
J.
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Robb Fasnacht Ide Allen Rogers Wilson Bingham Stubblefield Patterson Welcher Grant Hawkinson Brand
~I
INTERIM REPORT NO.
2 POTENTIAL REPORTABLE DEFICXENCY ARIZONA PUBLIC SERVICE COMPANY (APS)
PVNGS UNIT //2 I.
Potential Problem A concrete void in Unit 82 Control Building sump exists in the basemat adjacent to the West wall of the sump.
The void retains water when the sump is filled and releases water when the sump is emptied;
- however, the size of the void has not been determined.
The cause is
'attributed to lack of complete concrete consolidation due to reinforcement steel density.
This condition was not found and corrected during inspection and acceptance of the concrete placement because no surface indication was apparent.
II.
A roach To and Status Of Pro osed Resolution The condition is to be repaired by chipping existing concrete from the area ar.'d core-drilling holes into the void area to facilitate inspection and to determine the type and extent of concrete repair required.
Once the size and extent of the void is determined, a decision on its safety significance can be made.
IXI.
Pro'ected Com letion of Corrective Action and Submittal of Date of the Final Re ort The evaluation and necessary repair are forecast to be completed by August 1, 1981.
Additional time is required for Bechtel to determine the full extent of the void since it is larger than indicated'y the prelimin-g-evaluation.
The final report will be submitted by August 15, 1981.