ML19326C294
| ML19326C294 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 08/24/1977 |
| From: | Rueter D ARKANSAS POWER & LIGHT CO. |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| References | |
| 1-087-6, 1-87-6, NUDOCS 8004220851 | |
| Download: ML19326C294 (3) | |
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DISTRIBUTION AFTER ISSUANCE OF OPERATING LICENSE NRCPopM 196 G
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.NRC DISTRIBUTION ron PART 50 DOCKET MATERIAL TO:
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casemirrion Consists of Tendon Surveillance ENCLOSURE interim Report... Furnishing infomation on tendon wire tested for tensil strength...
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P0OR QUALITY PAGES PLANT NAME: ARKANSAS UNIT # 1 Jcm 09/16/77 I
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Mr. E. Morris Howard, Director Office o' Inspection & Enforcement
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U. S. Nuclear Regulatory Comission 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76011
Subject:
Arkansas Nuclear One-Unit 1 i
Docket No. 50-313 License No. DPR-51 Tendon Surveillance Report File: 0520.2 Gent moen:
Pursuant to Arkansas Nuclear One-Unit 1 Technical Specification 6.12.4, we are submitting ice following infomation concerning the subject report.
As required, one tendon wire from each of the three tendon families (dome, vertical and loop) was tested for tensile strength. The tensile strength for two of the three samples taken from a wire in hoop tendon 32H14 fell below the required minimum tensile strength of 240 ksi. A fourth sample was taken from the same wire and tested. The results were also below the minimum tensile strength. The highest tensile strength recorded for these tests was 246 ksi and the lowest value recorded was 229 ksi. These four tests were done on May 24 and 25,1977, using 100-inch samples in accord-ance with Section 7.3 of Operating Procedure 1304.91 At this time, a total of 46 hoop tendons have been identified as having the same heat of material as tendon 32H14. An engineering evaluation is in pmgress to detemine if this decrease in tensile strength constitutes abnomal degradation of the primary containment.
Therefore, we rw submit this interim report on Tendon Surveillance and
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g Mr. E. Morris Howard August 24, 1977 propose to submit a final report no later than November 1,1977.
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Donald A. Rueter Manager, Licensing DAR:DGM:aw l
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