ML20086K223

Second Interim Deficiency Rept,Item 102 Re Grease in friction-type Structural Connections.Initially Reported on 830426.Site Work & Technical Procedures Revised.Final Rept Will Be Submitted by 840601

ML20086K223
Person / Time
Site:	Harris
Issue date:	01/20/1984
From:	Parsons R CAROLINA POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
CON-NRC-171 102, NUDOCS 8401260356
Download: ML20086K223 (4)

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CD&L Carolina Power & Light Company E3 A g *,

P. O. Box 101, New Hill, N. C. 27562 8 January 20,1984 Mr. James P. O'Reilly NRC-171 United States Nuclear Regulatory Commission Region II 101 Marietta Street, Northwest (Suite 2900)

Atlanta, Georgia 30303 CAROLINA POWER & LIGHT COMPANY SHEARON HARRE NUCLEAR POWER PLANT 1986 - 900,000 KW - UNIT 1 GREASE IN FRICTION TYPE STRUCTURAL CONNECTIONS, ITEM 102

Dear Mr. O'Reilly:

Attached is our second interim report on the subject item which was deemed reportable per the provisions of 10CFR50.55(e), on April 26, 1983. CP&L is pursuing this matter, and it is currently projected that corrective action and submission of the final report will be accomplished by June 1,1984.

Thank you for your consideration in this matter.

Yours very truly, W

R. M. Parsons Project General Manager Shearon Harris Nuclear Power Plant RMP/sh Attachment ce: Messrs. G. Maxwell /R. Prevatte (NRC-SHNPP)

Mr. R. C. DeYoung (NRC)

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g CAROLINA POWER & LIGHT COMPANY SHEARON HARRIS NUCLEAR POWER PLANT UNIT NO.1 SECOND INTERIM REPORT GREASE IN FRICTION TYPE STRUCTURAL CONNECTIONS ITEM 102 l

January 20,1984 REPORTABLE UNDER 10CFR50.55(e) l l

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SUBJECT:

Shearon Harris Nuclehr Power Plant / Unit No. 1, 10CFR50.55(e), reportable deficiency. Grease in Friction Type Structural Connections.

ITEM: Bolted structural steel connections in the Unit No.1 Turbine and Containmant Buildings have evidence of grease between mating surfaces.

SUPPLIED BY: Not a supplier-related deficiency. All structural connections were field assembled.

NATURE OF DEFICIENCY: The Turbine Building is seismically designed per Regulatory Guide 1.29, and the Containment Building is a Seismic Class I

- $'ructure. All structural connections were designed as friction type connections, requiring grease-free mating surfaces.

These connections were previously inspected and accepted.

DATE PROBLEM OCCURRED: August 30,1982.

DATE PROBLEM REPORTED: On September 15, 1982, Mr. N. J. Chiangi notified the NRC (Mr. C. Hehl) that this item was potentially reportable.

On April 26, 1983, Mr. Chiangi notified the NRC (Mr. A.

Hardin) that the item was reportable per the provisions of 10CFR50.55(e).

SCOPE OF PROBLEM: A reinspection of the entire Turbine and Containment Buildings, including all connections where engineering evaluation indicated grease in the connection could have safety significance, has been completed. Approximately 878 l connections were reinspected in the Turbine Building and 500 in the Containment, with evidence of grease being found in l approximately 366 and 67, respectively. An additional 59

, connections in the Turbine Building have been identified as having evidence of grease since the reinspection addressed by this reportable item was completed. The connections were found to lack documentation, indicating no previous inspection.

SAFETY IMPLICATION: These structural connections were designed as friction type connections, with the ability of the connection to resist a shear failure dependent on the friction coefficient of the mating surfaces. The grease on these surfaces, by reducing i the slip resistance, could allow the shear load to be transferred to the bolts, for which they were not designed.

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REASON DEFICIENCY IS REPORTABLE: Reportabic due to the magnitude of the problem plus the extensive evaluation and/or rework required.

CORRECTIVE ACTION: Appropriate site work and technical procedures have been revised to specifically require mating surface inspection during fit-up, and to specifically forbid the use of lubricants to fit up bolts. Inspection and craft personnel have received additional training in inspection and erection of structural steel in formal classes and on-the-job training.

Permanent Waivers (PW's) have been written, requiring engineering evaluation, for each deficient connection. Each connection is being accepted "as-13" if not significantly deficient, or repaired to make it acceptable, based on this engineering evaluation. ,To date, approximately 52% of the connections with evidence of grease in the Turbine Building, and 70% of those in the Containment Building have been evaluated. Cf these totals, none have required rework but have been found to be . acceptable "as-is". Evaluation of the remaining connections is continuing.

FINAL REPORT: A final report will be issued when the evaluation and rework are complete. We now expect to issue a final report by June 1, 1984.

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