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{{#Wiki_filter:r-o PUBLIC SERVICE INDIANA S. W. Shields                                      June 9, 1983 Senior Vice President -                            S82-25 Nuclear Division                                SVP-0097-83 Mr. James G. Keppler,                                Docket Nos.: STN 50-546 Regional Administrator                                              STN 50-547 U. S. Nuclear Regulatory Commission                  Construction Permit Nos.:
Region III                                                          CPPR - 170 799 Roosevelt Road                                                  CPPR - 171 Glen Ellyn, Illinois 60137 Marble Hill Nuclear Generating Station - Units 1 and 2
 
==Dear Mr. Keppler:==
 
On October 20, 1982, Mr. T. D. Geib of Public Service Company of Indiana, Inc. (PSI) notified your office of a potentially reportable item as_ required by 10 CFR 50.55(e). During repair of spalled concrete around an embedded plate in the Unit 1 containment, deformed wire anchors were discovered to have separated from the plate. This item varies from that identified on August 18, 1982, since this embedded plate was installed after the resumption of safety related work at Marble Hill. Also, the scope of this problem is limited to separation of the wire anchors from the plate and at this time does not involve missing wires, nicked wires or wires bent beyond acceptable limits.
Tests performed by an independent laboratory to determine the failure mode of the cracked welds have been completed and the results analyzed.
The results of these tests indicate that an axial tensile stress applied to the welds was the primary cause of failure. PSI is now working to determine the source of the stress.
This letter is intended to fulfill the requirements of an interim report as defined in 10 CFR 50.55(e). A further report will be filed on or before September 2, 1983. If you have any questions regarding this matter please contact me at your convenience.
830617 DR AD Q 2 h    o PDR6                                  ,
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                                                        . S. W. Shields                [
SWS/LGY/bak                                                                        gQ P. O. Box 190, New Washington, Indiana 47162              812. 289.3000    JUN 1
 
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J SERVICE INDIANA Letter:  J. G. Kepple'r                        June 9, 1983 S82-25 F                                                                            SVP-0097-83 cc: Director of Inspection and Enforcement U. S. Nuclear Regulatory Commission                                                                                -
Washington, D. C. 20555 4                              J. E. Konklin J. J. Harrison 3
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Latest revision as of 02:18, 16 February 2020

Interim Deficiency Rept Re Separation of Deformed Wire Anchors from Embedded Plate in Containment.Initially Reported on 821020.Investigation Re Source of Axial Tensile Stress Applied to Welds Underway.Next Rept Due 830902
ML20024A375
Person / Time
Site: Marble Hill
Issue date: 06/09/1983
From: Shields S
PSI ENERGY, INC. A/K/A PUBLIC SERVICE CO. OF INDIANA
To: James Keppler
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
10CFR-050.55E, S82-25, SVP-0097-83, NUDOCS 8306170182
Download: ML20024A375 (2)
v • d • e


Text

r-o PUBLIC SERVICE INDIANA S. W. Shields June 9, 1983 Senior Vice President - S82-25 Nuclear Division SVP-0097-83 Mr. James G. Keppler, Docket Nos.: STN 50-546 Regional Administrator STN 50-547 U. S. Nuclear Regulatory Commission Construction Permit Nos.:

Region III CPPR - 170 799 Roosevelt Road CPPR - 171 Glen Ellyn, Illinois 60137 Marble Hill Nuclear Generating Station - Units 1 and 2

Dear Mr. Keppler:

On October 20, 1982, Mr. T. D. Geib of Public Service Company of Indiana, Inc. (PSI) notified your office of a potentially reportable item as_ required by 10 CFR 50.55(e). During repair of spalled concrete around an embedded plate in the Unit 1 containment, deformed wire anchors were discovered to have separated from the plate. This item varies from that identified on August 18, 1982, since this embedded plate was installed after the resumption of safety related work at Marble Hill. Also, the scope of this problem is limited to separation of the wire anchors from the plate and at this time does not involve missing wires, nicked wires or wires bent beyond acceptable limits.

Tests performed by an independent laboratory to determine the failure mode of the cracked welds have been completed and the results analyzed.

The results of these tests indicate that an axial tensile stress applied to the welds was the primary cause of failure. PSI is now working to determine the source of the stress.

This letter is intended to fulfill the requirements of an interim report as defined in 10 CFR 50.55(e). A further report will be filed on or before September 2, 1983. If you have any questions regarding this matter please contact me at your convenience.

830617 DR AD Q 2 h o PDR6 ,

f

. S. W. Shields [

SWS/LGY/bak gQ P. O. Box 190, New Washington, Indiana 47162 812. 289.3000 JUN 1

. . . _ . .- -- -_-.__-_-- = . -- - -- . - - . . ..- . . - .

J SERVICE INDIANA Letter: J. G. Kepple'r June 9, 1983 S82-25 F SVP-0097-83 cc: Director of Inspection and Enforcement U. S. Nuclear Regulatory Commission -

Washington, D. C. 20555 4 J. E. Konklin J. J. Harrison 3

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1 _

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, , . - , - - e,v, . . , ,, ,,-s- - , . . . ., ,-,,,n-e,

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