ML20195J038
| ML20195J038 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 01/11/1988 |
| From: | Counsil W TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| CP-85-39, TXX-88035, NUDOCS 8801200455 | |
| Download: ML20195J038 (7) | |
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Log # TXX-88035 File # 10110
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Ref. # 10CFR50.55(e)
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7UELECTRIC January 11, 1988 WiHism G. Counsil Executive Ske PressJens V. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D. C.
20555
SUBJECT:
COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)
DOCKET N05. 50-445 AND 50-446 EQUIPMENT CONDUIT INTERFACE SDAR: CP-85-39 (INTERIM REPORT)
Gentlemen:
On September 18, 1986, we verbally notified your Hr. T. F. Westerman of a deficiency involving conduit which was not installed in accordance with design documents.
Our last interim report was logged TXX-6940, dated November 9, 1987.
This issue is reportable under the provisions of 10CFR50.55(e) and the required information follows.
A self-initiated CPSES inspection of safety-related construction work has been completed.
During that review, some raceway to equipment interface installations were discovered as not conforming to the requirements of the design documents.
These interface concerns encompass the following three issues:
1)
Cable slack adequacy.
2)
Conduit-to-equipment interfaces outside the vendor approved area.
3)
Conduit orientation within the vendor approved entry area.
The evaluation of the conduit orientation within the vendor approved entry area (item 3 above) has been completed and is addressed in interim report logged TXX-6521, dated June 19, 1987.
No evidence was found to indicate that conditions adverse to quality exist.
Therefore, Item 3 is not reportable under the provisions of 10CFR50.55(e).
Records supporting this issue are available for your inspectors to review at the CPSES project site.
The evaluations of the remaining two issues have been completed and are summarized below.
CABLE SLACK ADEQUACY An extensive evaluation and review of the cable slack adequacy issue was performed.
The evaluation considered relative displacements due to both seismic and thermal motion.
Results of the evaluation indicate the two inch slack requirement is overly conservative and not required.
8801200455 080111 PDR ADOCK 05000445 S
PDR Il W) Nottis Olive Street LB89 Dallas, Texas 75201
TXX-88035 January 11,.1988 Page 3 of 4 A total of 25 sp;cifications with five hundred sixteen (516) pieces of equipment have been reviewed for equipment conduit interface installation outside of the vendor provided entry area.
Four hundred and four (404) com)onents were found acceptable, since the as-built configuration conformed will the design documents. One hundred twelve (112) components had discrepancy records written against them.
Upon review, om hundred one (101) of the discrepancies were transferred into NCRs (see Attachment 2) and were found acceptable with a disposition of "Use-As-Is."
Two (2) cases are being resolved separately as part of the response to SDAR CP-87-06, (Seismic Qualification of As-Built 480 Volt Power Centers).
The remaining nine (9) discrepancies were transferred into NCRs (see ) and dispositioned as requiring "Repair / Rework."
Four of these discrepancies were Class 1E equipment cabinets found to require repair / rework due to damaged structural members.
The structural members (angle iron) will be locally reinforced such that the section properties are equal to or greater Center (MCC)ginal members.
than the ori The cabinets are General Electric Motor Control units purchased under Specification 2323-ES-07, entitled "Motor Control Centers." Two of the cabinets are in Unit 1 and the remainder in Unit 2.
Their tag numbers are:
CPX-EPMCEB-05 480V MCC CP1-EPMCEB-03 480V MCC CP2-EPMCEB-02 480V MCC CP2-EPMCEB-03 480V MCC The other five (5) Class 1E cabinets requiring rework have been identified in the review of cabinets purchased under Specification 2323-ES-010, entitled "AC Distribution Panel Boards." The cabinets are:
CPI-ELDPEC-02 Ltg. Dist. Pnl. Board CPX-ELDPEC-14 120/208 VAC Ltg. Pnl. Train B CP2-ELOPEC-04 120/208 VAC Ltg. Pnl.
CP2-ELOPEC-13 120/208 VAC Ltg. Pnl. Train A CP2-ELDPEC-14 120/208 VAC Ltg. Pnl. Train B These panel boards / cabinets have conduits which entered in vendor non-approved areas.
The length and number of conduits used add a significant amount of mass to the cabinet which renders the seismic qualification invalid.
Rework is required to reduce the conduit tributary mass to the cabinet so a proper seismic qualification can be established, i
The cause for the equipment conduit interface outside vendor approved entry area problem was the misinterpretation of Specification 2323-ES-100, Revision 1
2, Sec. 4.11.2(e).
This section allows the constructors to deviate from conduit locations as shown on the vendor drawings.
The intent of this clause was to allow constructors to deviate from drawing during conduit routing to avoid interference and to resolve physical problems.
This section was not intended to allow the constructors to deviate from vendor drawings for conduit-to-equipment connections.
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'TXX-88035 January 11, 1988 Page 4 of 4 A secondary cause was that QC inspection procedure NQA-3.09-3.303 (Previously numbered Ql-QD-11.03-23, entitled "Class 1E Conduit Raceway inspections") did not adequately address equipment conduit interface. Other contributing factors were, nonavailability of vendor installation drawings identifying clearly the vendor approved entry area, and not using the vendor drawing during installation nor during QC inspection.
The implications derived from the engineering evaluation are limited to Class-1E electrical equipment where design requirements specify the type of equipment conduit interface. Where design and qualification parameters do not specify the type of equipment conduit interface, the installation procedure then will follow good industry practice.
The conclusion of the evaluation is that the observed construction deviations represent non-conformance conditions of which nine cases requiring repair / rework render this issue reportable under the provisions of 10CFR50.55(e).
The corrective actions for the issue of conduit-to-equipment interf aces outside of the vendor approved entry area are as follows:
1.
Repair / rework the nine (9) affected cabinets.
2.
The equi 1 ment qualification documents for the identified discrepancies l
will be arought into conformance with the "as-built" condition.
3.
Electrical Installation Specification 2323-ES-100, Revision 4, Section 3 and Appendix K, and QC Inspection Procedure NQA 3.09-3.03 will be revised to clearly require that the conduit-to-equipment connections (for Class 1E electrical equipment where design requirements specify the type of equi) ment conduit interface) be in accordance with the drawings.
Furt1ermore, the revisions will state that an engineering approval is required for any deviation from the drawings and that installations and inspections without the use of the drawings are unacceptable.
The schedule for completion of our corrective actions will be submitted in our next report no later than March 1, 1988.
Records supporting the above will be available for your inspectors to review at the CPSES project site at that time.
Very truly yours,
(
W W. G. Counsil RS8/grr Attachments c - Mr. R. D. Martin, Region IV Resident inspectors, CPSES (3)
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. to TXX-88035 January 11, 1988 Page 1 of 1 NCR'S DISPOSITIONED AS REQUIRING "REPAIR / REWORK" i
NCR NUMBER EQUIPMENT NUMBER PE-87-0362 CPX-EPMCEB-05 PE-87-0363 CP1-EPMCEB-03 CE-87-8349 CP2-EPMCEB-02 CE-87-8348 CP2-EPMCEB-03 PE-87-0402 CPX-ELOPEC-02 PE-87-0402 CP1-ELOPEC-14 f
CE-87-8314 CP2-ELOPEC-04 CE 87-8314 CP2-ELOPEC-13 l
CE-87-8314 CP2-ELOPEC-14
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r of TXX-88035 January 11, 1988 Page 1 of 3 NCR'S DISPOSITIONEO "USE-AS-!S" NCR NUMBER E9VIPMENT NUMBER PE-87-00468' CP1-EPSWEA-01 cpl-EPSWEA-02 PE-87-00469 CP1-EPHCEB-04 PE-87-00*?0 CPX-COPE 0-01 CPI-ECDPED-01 CPI-ECOPEO-02 cpl-ECOPED-03 CP1-ECDPED-04 PE-87-00471 CP1-EPSWED-02 CP1-EPSWED-04 PE-87-v0472 cpl-ELOPEC-16 CP1-ELOPEC-20 PE-87-00473 CPX-ELOPEC-03 CPX-ELOPEC-04 CPX-ELOPEC-05 CPX-ELOPEC-06 CPX-ELOPEC-08 CPX-ELOPEC-11 CPX-ELOPEC-14 CDX-ELOPEC-15 CPX-ELOPEC-16 CPX-El0PEC-18 CPX-ELOPEC-19 CPX-ELOPEC-20 CPX-ELOPEC-21 PE-87-00473 CPX-ELOPEC-24 CPI-ELOPEC-01 i
CPI-ELOPEC-02 CPI-ELOPEC-04 CP1-ELOPEC-05 CP1-ELOPEC-07 CP1-ELOPEC-08 cpl-ELOPEC-09 CP1-ELOPEC-10 cpl-ELOPEC-12 CP1-ELOPEC-13
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, to TXX-88035 January 11, 1988 Page 2 of 3 NCR'S DISPOSITIONED "USE-AS-IS" - CONT'D NCR NUMBER EQUIPMENT NUMBER PE< 37-00474 CPX-EIPRLV-06 PE-87-00475 cpl-EIPRLV-022 PE-87 00476 cpl-EIPRLV-08 PE-87-00477 CP-ECPRLV-01 CP-ECPRLV-15 PE-87-00478 CPX-ECDPEC-01 CPX-ECDPEC-02 CPX-ECDPNC-03 CPX-ECDPNC-04 CPI-ECDPPC-01 cpl-ECDPPC-02 CPI-ECDPPC-03 CP1-ECDPPC-04 CP1-ECDPEC-01 cpl-ECDPEC-03 cpl-ECDPEC-07 CPI-ECDPEC-12 PE-87-00479 CPI-EPBCED-01 cpl-EPBCED-03 PE-87-00504 1-LCS-3805 1-LCS-5806 1 l.CS-5800 PE-87-00505 1-LCS-5668 1-LCS-5674 1-LCS-5676 PE-87-00506 1-LCS-5686 B 1-LCS-5686 A PE-87-00507 1-LCS-5691 A 1-LCS-5691 B l-LCS-5691 C 1-LCS-5691 0 1-LCS-5691 C CE-87-08616 CP2-ECDPEC-01 CP2-ECDPEC-03 CP2-ECDPEC-04 CP2-ECDFEC 08 i
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- to TXX-88035
' January. 11, 1988 Page 3 of 3 NCR'S DISPOSITIONED "VSE-AS-IS" - CONT'O NCR NUMBER EQUIPMENT NUMBER i
CE-87-08617 CP2-ELOPEC-01 CP2-ELOPEC-02 CP2-ELOPEC-03 CP2-ELDPEC-07 CP2-ELOPEC-09 CP2-ELOPEC-10 CE-87-08618 TCX-ESELIV-02 TCX-ESEllV-04 CE-87-08619 CP2-EIPRLV-08 CE-87-08620 CP2-ECPRLV-01 CP2-ECPRLV-15 CE-87-08621 2-LCS-5686 A 2-LCS-5686 B i
2-LCS-5684 A 2-LCS-5684 8 CE-87-08622 2-LCS-5800 2-LCS-5802 CE-67-08623 2-LCS-5668 2-LCS-5676 CE-87-08624 CP2-ELDPEC-20 CE-87-08625 CP2-ECOPED-04 l
CE-87-08626 CP2-EPSWED-02 CP2-EPSWED-04
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CE-87-08627 CP2-ECDPPC-01 CP2-ECDPPC-02 CP2-ECDPPC-03 r
CP2-ECDPPC-04 i
L CE-87-08628 CP2-EPSWEA-01 CP2-EPSWEA-02 4
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