ML20217B093
| ML20217B093 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 10/06/1999 |
| From: | Baudhauer W FLORIDA POWER CORP. |
| To: | NRC |
| References | |
| REF-PT21-99 NUDOCS 9910120156 | |
| Download: ML20217B093 (4) | |
Text
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] M W1999' U.S. Nxcle r Regulatory Commission Oper:tions Center Event Report Pagei PowrReactor Evsnt #
36265
. Site: CRYSTAL RIVER '
Notification Date / Time: 10/06/1999 14:57 (EDT)
Unit: 3 Region: 2 State : FL Event Date / Time: 08/06/1999 (EDT)
~
Reactor Type: [3] B&W-L-LP Last Modification: 10/06/1999 Crntainment Type: DRY AMB
'NRC Notified by: W. BAUDHAVER Notifications: BRIAN BONSER R2 HQ Ops Officer: FANGIE JONES l VERN HODGES (FAX)
NRR Emergency Class: NON EMERGENCY 10 CFR Section:
21.21:
UNSPECIFIED PARAGRAPH
. Unit l Scram Code RX Crit jlnit Power Initial RX Mode lCurr Power l Current RX Mode 3
N No.
0-Hot Shutdown 0
Cold Shutdown 10 CFR PART 21 REPORT-DAMAGED SAFETY GRADE ELECTRICAL CABLING FOUND IN SUPPLY "On August 31,1999, damage to a new power cable being installed in a non-safety-related application under Modification Approval Record MAR 98-04-06-01 (Instrament Air Compressor Upgrade) was identified. The insulatior' on one conductor of three conductor cable (BlCC Brand Rex Company power cable #1108582,1 Kv,
- 3/C, #2/9, Class B, 900, XLPE insulated, Black Jacket) was found to be damaged when the outer jacket was rImoved for termination. This was the first issuance of the' cable (4 Reels containing approximately 4,000 feet total
= in stock), which had been procured as safety grade and Environmentally Qualified (EQ) (PO #F830409D). A total of six samp es of the pulled cable were inspected. Damage to the same conductor was found in all six samples.
Th3 cable a opeared to have been damaged during fabrication rather than by cable pulling techniquas.
~ "The vendor sLtid that the damage was created during the cabling process while combining the three conductors
. Just prior to closing. Thtndamaged conductor fell off the cabling unit pulley due to loss of tcnsion, causing the
. Insulation to be scraped
' "Although never v9ed in the plant, the subject cable could have been used in a safety-related application in a harsh
- snvironment such as the Reactor Building or Intermediate Building. In a harsh environment created under accident L conditions, the damaged cable Irisulaticn could allow the cable conductor to " leak" through moisture to nearby grounds,' thus tripping and rendering inoperable, equipment downstream of the fault. Normally, conductor
! Insulation is the primary barrier to leaks in loss of Coolant Accident (LOCA) tests when jacket material g
]
J occasionally cracks. Also, if the cane was installed in a metal cabinet so that the cable outer jacket had been f
- stripped near the defect to allow cable termination, the damaged cable insulation ca the one conductor could
.- potentially allow contact with the cabinet or a nearby ground during a seismic event and cause the circuit to malfunction. In either case, safety-related loads required to mitigate the consequences of an accident or to perform
! c safety-relate ( function, could be impacted to the extent that a substantbl safety hazard could be created.
"The above evaluation was completed on October 4,1999. The FPC director / responsible officer was notified of the #
L above determination on October 6,11s39. The vendor has been notified of FPC's intent to report this issue under
' 10CFR21.21."
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. U.S. Nuclear Reg:latory Ctmmission Operations Center Event Report P:ge 2 _
4
.. Power Reactor.
Ev:nt 0 36265 The licensee notified the NRC Resident inspectorc.
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CORP 7 RATION l
Date:
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/ /799
/3 et wd h ct uer(5 74) Voice:
From:
UJ K.
(352) 795-6486, ext. 32 N O Crystal River Unit 3 FAX:
(352) 563-4697 i
Nuclear Admin Bldg (or 7-240-3751 via FPC IntraNet) 2nd Floor Xerox Room 4
15760 West Power Line Street Crystal River, FL 34428-6708 TO:
RRL DRSM176uJ t'mlEt' Company:
MIRLEntLFf,LMthlDitdott4t/Subtf g a g,g y a m y,, a g Pages to Follow:
FAX:
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Telephone:
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COMMENTS:
p FACSIMILE TRANSMISSION 10 CFR PART 21.21 TWO DAY NOTIFICATION
' Florida Power Company (FPC) '
October 6,1999 j
Crystal River Unit 3 (CR-3)
Docket No. 50-302 i
On August 31,1999, damage to a new power cable being installed in a non-safety-related application 'under Modification Approval Record MAR 98-04-08-01 (Instrument Air Compressor Upgrade) was identified. The insulation.on one conductor of three conductor cable (BICC Brand Rex Company power cable #1108582,1Kv, 3/C, #2/0, Class B, 90C, XLPE Insulated, Black Jacket) was found to be damaged when the outer jacket was removed for termination. This was the first issuance of the cable (4 Reels containing approximately 4,000 feet total in stock), which had been procured as safety grade and Environmentally Qualified (EQI (PO #F630409D). - A total of six samples of the pulled cable.
were inspected.
Damage to the same conductor was found in all six samples. The cable appeared to have been damaged during fabrication rather than by cable pulling techniques.
I The vendor. stated that the damage was created during the cabling process while combining the three conductors just prior to closing. The damaged conductor fell off the cabling unit pulley due to loss c! tension, causing the insulation to be scraped Although never used in the plant,' the subject cable could have been used in a safety-related application in a harsh environment such as the Reactor Building or intermediate
-Building. In a harsh environment. created under accident conditions, the damaged cable Insulation could allow the cable conductor to " leak" through moisture to nearby grounds, thus tripping and rendering inoperable, equipment downstream of the fault. Normally, conductor insulation ~ is the primwy barrier to leaks in Loss of Coolant Accident (LOCA) tests when Jacket material occasionally cracks. Also, if the cable was installed in a metal cabinet so that the cable outer jacket had been stripped near the defect to all ow cable termination, the damaged cable insulation on the one conductor could potentially allow contact'with the cabinet or a nearby ground during a seismic event and cause the circuit to malfunction. In either case, safety related loads required to mitigate the consequences of an accident or to perform a safety related function, could be impacted to the extent that a substantial safety hazard could be created.
The above evaluation was completed on October 4,1999. The FPC director / responsible officer was notified of the above determination on October 6,1999. The vendor has been notified of FPC's intent to report this issue under 10CFR21.21.
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