ML20206U666

Interim Deficiency Rept,Item 233 Re 12 Electrical Separation Interactions on Two Conduits in Fuel Handling Bldg.Initially Reported on 860822.Separation Interactions Reworked & Reinsp.Next Rept Will Be Submitted by 861003

ML20206U666
Person / Time
Site:	Harris
Issue date:	09/19/1986
From:	Watson R CAROLINA POWER & LIGHT CO.
To:	Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
CON-NRC-481 233, HO-860350(O), NUDOCS 8610080095
Download: ML20206U666 (4)

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Cp&L Carolina Power & Light Company m_ _m. em-. -w HARRIS NUCLEAR PROJECT P. O. Box 165 New Hill, NC 27562 cn en rri File Number: SHF/10-13510E ~0 Letter Number: H0-860350 (0) U NRC-481 Dr. J. Nelson Crace '

United States Nuclear Regulatory Commission Region II I

o 101 Marietta Street, Northwest (Suite 2900) re Atlanta, Georgia 30323 CAROLINA POWER & LIGHT COMPANY SHEARON HARRIS NUCLEAR POWER PLANT 1986 - 900,000 KW - UNIT 1 ELECTRICAL SEPARATION ITEM 233

Dear Dr. Grace:

Attached is an interim report on the subject item, which was deemed reportable per the provisions of 10CFR50.55(e) on August 22, 1986. CP&L is pursuing this matter, and it is currently projected that a schedule date of issuance of a final report will be provided by October 3, 1986.

Thank you for your consideration in this matter.

Yours very truly, R. A. Watson Vice President Harris Nuclear Project RAW /Ime Attachment cc: Messrs. C. Maxwell (NRC-SHNPP) l J. M. Taylor (NRC) 8610090095 860919 PDR S

ADOCK 05000400 PDR MEM/H0-8603500/ PACE 1/OSI  ; i

J CAROLINA POWER & LIGHT COMPANY SHEARON HARRIS NUCLEAR POWER PLANT

! UNIT 1 INTERIM REPORT ELECTRICAL SEPARATION I- ITEM 233 SEPTEMBER 17, 1986 REPORTABLE UNDER 10CFR50.55 (e) i 1-MEM/HO-8603500/ PACE 3/0S1 1 . . - _ . - - - _ . - - . , . - - . ._ .- .- . - . _ . -

Subject:

Shearon Harris Nuclear Power Plant, Unit No. 1, 10CFR 50.55 (e) reportable item. A quantity of electrical separation interactions remain undetected after acceptance by installation inspection.

Item: Safety related raceway, cable and equipment.

Supplied by: Not a vendor deficiency.

Nature Of An NRC inspector identified 12 electrical Deficiency: separation interactions on two conduits in the Fuel Handling Building during a site inspection in July 1986. To determine if these cases were isolated a re-inspection of the Fuel Handling Building elevation 286' and portions of the Reactor Auxiliary Building was performed. The results of these re-inspections indicated that a number of separation interactions remained after programmatic controls for engineering, construction, and inspection had been exercised.

Date Problem These items were installed and inspected prior Occurred: to August 22, 1986.

Date Problem: On August 22, 1986, CP&L (Mr. Kumar Hate') notified Reported: the NRC (Mr. P. Fredrickson) that this item was reportable per the provisions of 10CFR50.55(e).

Scope of This deficiency affects plant areas with safety Problem: related electrical raceway , cable and equipment.

Safety The separation interactions that have been Implications: evaluated (including the 12 that were identified by the NRC) were determined not to be safety significant. However, the number of existing interactions retaaining in the plant (some yet to be identified) make it difficult to evaluate the safety significance on a timely basis.

Reason If left uncorrected, a separation interaction Deficiency is could cause loss of a safety function or Reportable: redundant feature as a result of an internal fault within a cable.

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MEM/HO-8603500/ PACE 4/OS1

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Corrective Areas that contain safety related raceway, cable, Action: and equipment will be walked down to identify the

• emaining separation interactions. As required, these items will be reworked and re-inspected.

To reduce the complexity of installation, new electrical design in safety related. areas will be -

pre-engineered. Project drawing CAR-2166-B-060 will be revised to reflect the separation criteria previously identified in HPES Guideline 7.5.Q.

Craft supervision will receive additional training to the new separation criteria. Increased emphasis and accountability will be placed on craft supervision for installations involving electrical separation. Also other discipline work procedures will be changed to reflect their understanding of separation requirements.

Construction inspectica personnel will receive additional training to the new separation criteria.

Inspection procedures will be reviewed and revised as necessary to enhance the identification and documentation of separation violations. Installations rejected for electrical separation deficiencies will be trended separately to provide visibility to management.

Final Report: The engineering identification of separation items in the field is on going at this time. Until the scope of field work has been determined, a completion date can not be established. It is currently projected that CP&L will be able to provide a schedule for a final report by October 3, 1986.

MEM/H0-8603500/PAGE 5/OSI

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