ML20083M743
| ML20083M743 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 01/21/1983 |
| From: | Robert E. Uhrig FLORIDA POWER & LIGHT CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, L-83-29, NUDOCS 8302010447 | |
| Download: ML20083M743 (2) | |
Text
P. O. BOX 14000. JUNO BE ACH, F L 33408 4'
FLORIDA POWER & LIGHT COMPANY January 21, 1983 L-83-29 u
':a e
Mr. James P. O'Reilly s"
Regional Administrator, Region II U. S. Nuclear Regulatory Commission p
101 Marietta Street, Suite 3100 C
Atlanta, Georgia 30303
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Dear Mr. O'Reilly:
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Re:
RII:JP0 Docket No. 50-389, 10 CFR 50.55(e),82-028 Defective Heat Trace Cabling
Dear Mr. O'Reilly:
On December 21, 1982, Florida Power & Light notified NRC Region II of a potential 10 CFR 50.55(e) condition existing at St. Lucie Unit #2 Site involving defective heat trace cabling.
Pursuant to the requirements of 10 CFR 50.55(e), a final report is attached.
Very truly yours,
&l C hbb Robert E. Uhrig Vice President Advanced Systems and Technology REU/J0/ cab Attachment
{ DFFICIM. rnpy 8302010447 830121 PDR ADOCK 05000389 S
PDR PEOPLE.. SERVING PEOPLE
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I.
Summary The heat tracing cable vendor for St Lucie Unit 2, Nelson Electric, provided the NRC with' written notification that discontinuities were found in the brazed sleeves of Miner-al Insulation heating cable assemblies supplied at St Lucie
'init 2.
Per the requirements of 10CFR50.55(e) this concern was evalu-ated and has been deemed reportable.
This final report is be-ing submitted to provide NRC with a description of the defic-iency and the corrective actions which have been implemented.
II.
Description G.S. Nelson Electric reported via letter to NRC dated December.
1, 1983, that discontinuities were found in the brazed sleeves of MI heating cable assemblies.
These discontinuities are sus-ceptible to opening during the thermal cyc1fng,of these cables and.could permit moisture,to penetrate'during shutdown of.the.
equipment.
Presence of moisture will result in malfunction of' the heater cable.
The Nelson heating cables are being used in the Chemical and Volume Control System (CVCS) piping.
Upon performance of dye penetrant testing, 51 of 58 sleeves were found defective.
III.
Corrective Action All heat trace sleeves of the affected G.S. Nelson Electric batch will be subjected to a 100% non-destructive dye penetrant examin-ation.
Acceptance will be based on zero de'fects.
Any assembly found to have discontinuity in the brazed sleeve will either be replaced or repaired per applicable procedure.
The piping insu-lation will be removed and replaced as required.
IV.
Safety Implications We have evaluated this concern and determined that a deficiency in assembly construction exists which if left uncorrected could affect plant safety.
Should a heating cable failure occur, it could cause the borated water to solidify and prevent the CVCS system from functioning prope.rly.
Since the CVCS is used to bring the plant to shutdown, the existence of the defective heating cable assemblies represented a potential safety hazard.
Corrective action as identified above has been undertaken.
V.
Conclusion With the above mentioned corrective actions, this item is resolved and closed regarding 10 CFR 50.55(e) reporting. require-ments.
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