ML20106E078
| ML20106E078 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 10/09/1984 |
| From: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Bishop T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| ANPP-30782-TDS, DEFR-84-59, DER-84-59, NUDOCS 8410290018 | |
| Download: ML20106E078 (4) | |
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masyta n=3 Arizona Public Service Company _, CCI I t; C1 ty y October 9, 1984 ANPP-30782-TDS/d,,hdd/i/
U. S. Nuclear Regulatory Costission Region V Creekside Oaks Office Park 1450 Maria Lane - Suite 210 Walnut Creek, California 94596-5368 Attention: Mr. T. W. Bishop, Director Division of Resident Reactor-Projects and Engineering Programs Final Report - DER 84-59
Subject:
A 50.55(e) Reportable Condition Relating To MCC Cables Damaged By Fire Stops.
File: 84-019-026; D.4.33.2 A) Telephone Conversation between J. Ball and T. Bradish on
Reference:
August 22, 1984 B) ANPP-30598, dated September 21,1984 (Interim Report)
Dear Sir:
Attached is our final written report of the Reportable Deficiency under 10CFR50.55(e), ref erenced above.
Very truly yours, f
' Q.LL' LLC W E. E. Van Brunt, Jr.
APS Vice President Nuclear Production ANPP Project Director EEVB/TRB/nj Attachment cc: See Page Two Og O290018 8 h hg:
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. Richard DeYoung, Director Office of Inspection and Enforcement
- JU. S. : Nuclear Regulatory Commission Washington, D. C.
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. D.' B.' Fasnacht A.'Cl Rogers
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?l, J FINAL REPORT - DER 84-59 DEFICIENCY EVALUATION 50.55(e)
ARIZONA PUBLIC SERVICE COMPANY (APS).
PVNGS UNITS 1, 2, 3 v.
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. Description of Deficiency
-During startup. testing activities it was discovered that some-electrical cabinet moisture seals may have caused damage to
. the ' associated cables' insulation and jacket by contact with the metal edge of the' seal. The affected seals are above
. Motor Control-Center (MCC) cubicles 2E-PKB-M4205, 2E-PKC-M4205, and 2E-PKD-M4413 f or Unit 2.
Further investigation revealed that the associated wiring with seals above MCC cubicles 2E-PKC-M4307; and 2E-PKD-M4413 were not damaged.
Evaluation Damage to the one' cable above E-PKB-M4205 is attributed to one of -two. possibilities; (1) the seal edge vibrating ~against the cable, - or (2) the seal was used as a step. The root cause is the lack of a specification / design requirement for edge protection similar to that used with cable trays.
L A walkdown was done on all the remaining seals in Unit 2.
No other cables were found damaged. However, f or cases-where the cable enters. the seal at an extreme angle, there exists a possibilityzthat the seal'edga can contact and damage the cable insulation and: jacket. To preclude any future problem,'
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' electrical' tray. metal edge protectors willibe installed on an
- as required" hasis to -provide protection to the associated cables.. Cable' installation. inspection has indicated no bend radius problems.
II.
Analysis of Saf ety ' Implications a.
The cutting of the cable could' potentially short' out the.
related circuit. - This condition 'could: prevent Class-lE a
t-equipment from performing its intended safety function.
Based on' the above, this condition is evaluated;as reportable under the-requirements of,10CFR50.55(e); since, 'if this ~
condition were to remain uncorrected, it would represent a -
.significant safety condition. -This condition is evaluated as not reportable 'under 10CFR Part 21, since the affected sub-systems had not been delivered to operations.
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Mr. T. W. Bishop DER'84-59 Page Two III.
Corrective Action
- 1. SWA-8941 was issued to replace the damaged cable above HCC 2E-PKB-M4205. NCR SM-4857 was issued to reposition the cables in the new seal; also, to install metal edge protectors if the cables are still in contact with the seal's metal edge.
- 2. NCRs SE-4884 and SM-4857 were issued to inspect all the fire / moisture penetrations in Units 1 and 2 respectively and install edge protectors wherever cable jackets are in contact with the metal edge.
- 3. For Unit 3 installs.tions, metal edge protectors will be installed on any seal that has the potential of damaging the cable. At this time the seals have not been installed.
4.= DCN 25 to Drawing 13-A-ZYD-096 was issued to add the requirement for. sheet metal dam edge protectors in moisture seals.
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