ML20209F174
| ML20209F174 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 06/27/1985 |
| From: | Watson R CAROLINA POWER & LIGHT CO. |
| To: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| CON-NRC-376, REF-PT21-85, REF-PT21-85-306-000 131, PT21-85-306, PT21-85-306-000, NUDOCS 8507120403 | |
| Download: ML20209F174 (4) | |
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Cp&L Carolina Power & Light Company
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- r P. O. Box 101, New Hill, NC 27562 June 27,1985 Dr. J. Nelson Grace NRC-376 United States Nuclear Regulatory Commission Region 11 101 Marietta Street, Northwest (Suite 2900)
Atlanta, Georgia 30323 u1 CAROLINA POWER & LIGHT COMPANY S
SHEARON HARRIS NUCLEAR POWER PLANT F
1986 - 900,000 KW - UNIT 1 UNVERIFIED ANCHOR BOLT MATERIAL TYPE -ITEM 131 3
Dear Dr. Grace:
Attached is our third interim report on the subject item, which was deemed reporta61@ per the provisions of 10CFR50.55(e) and 10CFR, Part 21 on March 6,1984. CP&L is puTuing this matter, and it is currently projected that corrective action and submission of the final report will be accomplished by August 2,1985.
Thank you for your consideration in this matter.
Yours very truly, R. A. Watson Vice President Shearon Harris Nuclear Power Plant RAW:bs Attachment cc:
Messrs. G. Maxwell /R. Prevatte (NRC-SHNPP)
Mr. R. C. DeYoung (NRC) 8507120403 85062 ADOCK050g400 OE FICI AL t.'OM-DR DR p r1i i XEX-SMI/1-OSS
CAROLINA POWER & LIGHT COMPANY SHEARON HARRIS NUCLEAR POWER PLANT UNIT NO.1 THIRD INTERIM REPORT l
UNVERIFIED ANCHOR BOLT MATERIAL TYPE ITEM 131 i
June 27,1985 l
REPORTABLE UNDER 10CFR50.55 (e) l l
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XEX-SMI/3-OS5
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SUBJECT:
Shearon Harris Nuclear Power Plant, Unit 1,
10CFR50.55(e), reportable deficiency. Anchor Bolt identification / Installation.
ITEM:
Anchor bolt material type in the Power Block was not verified by Construction Inspection.
SUPPLIED BY:
Not a supplier-related deficiency.
NATURE OF DEFICIENCY:
Construction Inspection was required to verify anchor bolt type; however, only a dimensional check was made to identify anchor bolts with missing or illegible tags. Since certain anchor bolt types have the same physical dimensions yet different material requirements, low strength bolts could have been substituted for high-strength bolts.
DATE PROBLEM OCCURRED:
Prior to April 18, 1983.
DATE PROBLEM REPORTED:
On May 3,1983, CP&L (Mr. N. J. Chiangi) notified the NRC (Mr. A. Hardin) that this item was potentially reportable.
On March 6,1984, CP&L (Mr. N. J. Chiangi) notified the NRC (Mr.
A. Hardin) that the item was reportable per the provisions of 10CFR50.55(e).
SCOPE OF PROBLEM:
Random sampling has indicated some substitution of bolts, and after additional sampling it. was determined that a comprehensive test program covering the anchor bolts in question would be required.
SAFETY IMPLICATION:
The requirement for high-strength bolting material indicates that design loads are relatively high.
Thus, the possibility exists that the allowable loads on low-strength material substituted could be exceeded, and engineering evaluation will be required.
REASON DEFICIENCY Reportable due to the extensive evaluation and/or IS REPORTABLE:
rework required.
XEX-SMl/4-OS5
e CORRECTIVE ACTION:
The appropriate site technical procedure has been revised to specifically require material identification as part of the anchor bolt inspection.
A 100% sampling program was initiated to identify anchor bolt substitutions and to permit engineering evaluation for acceptability or further corrective action. Samples of the anchor bolts (by cutting a section off the bolt) were taken for testing in the materials test lab. Substitutions were identified on permanent waivers and forwarded to Engineering.
Sampling of accessible bolts 'in question has been completed and the samples were forwarded to the materials test lab where testing has also been completed. Engineering evaluation of anchor bolts in question is complete with the exception of those
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on five pieces of equipment, for which evaluation is in progress.
The anchor bolts evaluated to date have been found to be acceptable.
FINAL REPORT:
A final report will be issued when the evaluation and any necessary rework are completed.
We now expect to issue a final report by August 2,1985.
XEX-SMI/5-OS5