ML20212D008

Final Deficiency Rept,Item 229,re Emergency Svc Water Pump a Trip.Initially Reported on 860609.Caused by Failure of Penetration Seal at Intake Structure.Seal Design Modified. Pump Disassembled & Inspected

ML20212D008
Person / Time
Site:	Harris
Issue date:	07/09/1986
From:	Watson R CAROLINA POWER & LIGHT CO.
To:	Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
CON-NRC-464 229, HO-860318-(), HO-860318-(0), HP-860318-(), NUDOCS 8608120356
Download: ML20212D008 (4)

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M16 CD&L Carolina Power & Light Compar.y

. . . . - # . r ,.1 y : w ,. j _ j!j p]; gu HARRIS NUCLEAR PROJECT P. O. Box 165 JUL 9 1986 New Hill, NC 27562 File Number: SHF/10-13510E Letter Number: HO-860318 (0)

Dr. J. Nelson Crace NRC-464 United States Nuclear Regulatory Commission Region II 101 Marietta Street, Northwest (Suite 2900)

Atlanta, Georgia 30323 CAROLINA POWER & LICHT COMPANY SHEARON HARRIS NUCLEAR POWER PLANT 1986 - 900,000 KW - UNIT 1 EMERCENCY SERVICE WATER INTAKE STRUCTURE - PENETRATION SEAL, ITEM 229

Dear Dr. Crace:

Attached is final report on the subject item, which was deemed reportable per the provisions of 10CFR50.55(e) on June 9, 1986.

With this report, Carolina Power & Light Company considers this matter closed.

If you have any questions concerning this matter, please do not hesitate to contact me.

Yours very truly, R. A. Watson Vice President Harris Nuclear Project RAW:cge Attachment cc: Messrs. C. Maxwell (NRC-SHNPP)

J. M. Taylor (NRC) l i

$5$o0ln0 PDR \

I MEM/HO-860318(0)/ PACE 1/0S1 g i

.T E M

CAROLINA POWER & LIGHT COMPANY SHEARON HARRIS NUCLEAR POWER PLANT UNIT 1 FINAL REPORT 4

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EMERGENCY SERVICE WATER INTAKE STRUCTURE t-WALL PENETRATION SEAL - TYPE B-2

', NCR-0P-86-0037 i

ITEM 229 l

JULY 7, 1986 j REPORTABLE UNDER 10CFR50.55 (e) l 1

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i i IBMD-MS86-OS4/ Item 229

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SUBJECT:

Shearon Harris Nuclear Power Plant Unit No. 1 10CFR50.55(e) reportable deficiency. Failure of penetration seal type, B-2, at the Emergency Service Water Intake Structure in Bay 8. The type B-2 seal is also utilired in Bay 6 of the i~ Emergency Service Water Intake Structure, d

ITEM: Penetration seal, type B-2, NNS, non-seismic.

NATURE OF DEFICIENCY: Penetration seal, type B-2 is a water tight seal which utilites a reibber boot design. Stresses imposed on boot materials by raising and lowering-the water level during start-up testing caused failure of the boot. This event caused Emergency Service Water Pump "A" to trip on an over-current signal.

i DATE PROBLEM IDENTIFIED: Shearon Harris personnel identified this problem via NCR-0P-86-0037 June 5, 1986.

! DATE PROBLEM j REPORTED: On June 9, 1986, CP&L (Mr. K.V. Hate') notified t

the NRC (Mr. L. Mellen) that the item was

} reportable under the provisions of 10CFR50.55 f

(e).

SCOPE OF PROBLEM: The deficiency involves two Unit 1 penetration

seals, type B-2. One in Bay 6 and one in Bay 8 of the Emergency Service Water Intake Structure.

SAFETY IMPLICATIONS: Failure of the non-safety, non-seismic penetration seal could prevent the operation of the Emergency Service Water System by allowing sand to enter the Emergency Service Water Pump bay blocking suction to the pump.

l REASON 4

DEFICIENCY IS REPORTABLE: The failure compromised the availability of redundant emergency service water pump to

, supply service water to safety related components. This reduces the degree of j protection to plant systems and to public health.

J IBMD-MS86-OS4/ Item 229

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CORRECTIVE ACTION: A modified penetration closure detail was

. designed and installed in both Bays 6 and 8 of-the Emergency. Service Water Intake Structure.

The detail involved closing the penetration in J

two steps:

1 1.

Closure of the area inside the wall penetration around the pipe with M-20 grout, i 2. Addition of an external closure plate which

!. compressed sealing material as it was installed.

4 1

The new detail was designed as Safety Class I.

l l

Emergency Service Water Pump "A" was i

disassembled and inspected. No significant damage due to the subject failure was noted, a The pump was reassembled and returned to 4

operable condition, t

FINAL REPORT Corrective action has been completed. This is the final report for Item 229.

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IBND-MS86-OS4/ Item 229

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