ST-HL-AE-2538, Supplemental Deficiency Rept on Electrical Splices Using Raychem Heat Shrink Insulation Matl.Initially Reported on 870219.Review of Cables & Terminations Listed as Not Having Splice Performed to Assure Proper Transmission of Info

Supplemental Deficiency Rept on Electrical Splices Using Raychem Heat Shrink Insulation Matl.Initially Reported on 870219.Review of Cables & Terminations Listed as Not Having Splice Performed to Assure Proper Transmission of Info

ML20147F456
Person / Time
Site:	South Texas
Issue date:	03/01/1988
From:	Goldberg J HOUSTON LIGHTING & POWER CO.
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
ST-HL-AE-2538, NUDOCS 8803070353
Download: ML20147F456 (6)

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l March 1, 1988 ST-HL AE-2538 File No.: G12.364, G12.403 G2.2, G4.02, G26 10CFR50.55(e) 10CFR50.73 10CFR21 U. S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC 20555 South Texas Project Electric Generating Station Units 1 and 2 Docket Nos. STN 50-498, STN 50 499 Supplemental Report Concerning Electrical Splices Using Raychem Heat Shrink On February 19, 1987, Houston Lighting & Power Company notified your office pursuant to 10CFR50.55(e) of an item concerning electrical splices using Raychem heat shrink insulation material. Enclosed is a Supplemental Report on this item, if you should have any questions on this matter, please contact Mr.

J. S. Phelps at (512) 972-7071.

J. H. Goldberg .

Group Vice President, Nuclear SDP/hg

Attachment:

Supplemental Report Concerning Electrical Splices Using Raychem Heat Shrink 0803070353 880301 PDR ADOCK 05000498 6

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' Regional Administrator, Region IV 'Rufus S. Scott Nuclear Regulatory Comission Associate General Counsel 611 Ryan Plaza Drive Suite 1000 Houston Lighting 1 Power Company Arlington -TX 76011 P. O. Box 1700 Houston, TX 77001 N. Prasad Kadambi, Project Manager U.S. Nuclear Regulatory Comission .!'

7920 Norfolk Avenue Bethe:da, MD 20814 ,

Dan R. Carpenter ,

Senior Resident Inspector / Operations y c/o U.S. Nuclear Regulatory Comission P. O. Box 910 4 Bay City, TX 77414 Claude E. Johnson Senior Resident Inspector / Construction c/o U.S. Nuclear Regulatory Comission P. O. Box 910 Bay City TX 77414 J. R. Newman, Esquire Newman & Holtzinger, P.C.

1615 L Street, N.W. "*

Washington, DC 20036 R. L. Range /R. P. Verret '

Central Power & Light Company P. O. Box 2121 4 Corpus Chri*ti, TX 78403 R. John Miner (2 copies)

Chief Operating Officer City of Austin Electric Utility 721 Barton Springs Road Austin, TX 78704 R. J. Costello/M. T. Hardt City Public Service Board P. O. Box 1771 .,

San Antonio, TX 78296 Revised 11/20/87 J

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i Supplemental Report Concerning Electrical Splices Using Raychem Heat Shrink I. Summary The NRC staff conducted a site visit during January,1988 to review among -

other areas, electrical systems at STP. The reviewer inspected Raychem i; cable to cable terminations (splices) at penetration A1PHEP017. One splice was found without reinspection documentation. Unit 1 and 2 Raychem installations and configurations'have been previously reported as 10CFR50.55(e) items and Unit 1 splices were the subject of a Licensee E*ent Report. Corrective actions were taken as stated in previous correspondence to the NRC. However, these actions did not completely identify all splices.

Additional corrective actions have been initiated to resolve this deficiency. Raychem installations which were omitted from previous reinspection programs and required to be reinspected have been identified

and dispositioned by Engineering evaluation or reinspection. Standard site procedures (SSPs), training sessions, and guidelines used in conjunction with the corrective action process, will be revised to assure  !

that similar investigations are conducted properly in the future.

4 II. Background a

On February 19, 1987, HL&P notified the NRC pursuant to 10CFR50.55(e), of an item concerning safety related electrical splices containing  ;

, incorrectly installed Raychem heat shrink insulation material. A 1 reinspection program was initiated to determine the total number of incorrectly installed splices. At the completion of the splice reinspection and rework effort it was concluded that Raychem splice 2

configurations installed in the plant were consistent with Raychem specifications or were bounced by applicable environmental qualification test results from other plants, i On September 18, 1987, HL&P notified the NRC of another item concerning safety related electrical cable splices and terminations. Raychem heat shrink material used for some electrical cable splices and terminstions made subsequent to the February 20, 1987 reinspection had been installed j incorrectly It was determined that site procedures which require Raychem splices to be installed and inspected to a specified cable splice a detail sheet generated by Engineering were not followed.

These incorrect splice installations represented a breakdown in recurrence control measures implemented as a result of the earlier Raychem installation problems. [

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'. Additional details were p::ovided to cha NEC N the fb11owing HIAP letters (USNUC, Document Contsp\ Desk): . '; .

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ST HL-AE-1952, dated March'18, 1987, FIRST INTERIM REPORT CONCERNING F'

ELECTRICAL SPiICES USING RAYCHEM HEAT MRINK ST-HL-AE-2176, dated Map.1h' Q87, SECOND INTERIM REPORT CONCERNING ELECTRICAL SPLICES USING M'; EM HEAT SHRINK i

l ST-HL-AE-2200,' dated May 29, 1987, THIRD INTERIM REPORT CONCERNING ELECTRICAL SPLICES USING RAVCHEM HEAT SHRINK r s

i ST-HL-AE 2242, dated Juro 10;M87, FINAL REPORT CONCERNING ~

FLECTRICAL SPLICES USIFJ ItAYCJEM HEAT SHRINK.

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.ST-HL-AE 2384, dated Octobe.r 15, 1587,* INTERIM REPORT CONCERNING CIASS lE CABLE SPLICES. - i m ,

ST-HL-AE-2442, dated December 16, 198?,' FINAi,REJORT COUCERNING CIES lE CABLE SFLICES.

III.Descrir$1onofDeficiency

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, \ " s, Dur}ng l January 198i NRC review a Raychem splice installation was jidenrKied that was t,otJisted on the reinspection data list. . HIAP i

' determined that this incorrect entry occurred during the compilation of

'the mast *x splice lists for the reinspection program from the EE 580 card i

review. A reviewer had incorrectly interpreted the card listing as having no Raycym splice installed. Subsequent reviews of the cable and

- N rmination dauumentation to identify other conditions where splices s .\ exis2 tr.at had not been identified in previous reinspection programs were i

"' p e.~fArme d . The reviews disclosed additional splices which required

,s 141?y.yec tion. '

1 \ Lh c,auses of the omissibn's were:

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Faibre to ' document and fully check computier file retrieval requests.'

from the EE-580 qstem. 's Failure to. document and full / check manual exclusions from the

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master file sort.

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't Failxte tl check transfers of d d.a from one controlling list to

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another fog completeness prior'tg using the second list.

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.These. discrepancies represent a failure in the corrective action process

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. in that the previous investigations were not effective in ' identifying all splices requiring reinspection, s IV. Corrective Action The. review process. utilized to execute.previousfreinspections was '

evaluated to determine the adequacy of the review process for each of the reviews _ performed. As a result of the evalnation, the following actions.

were initiated (this time under thel direction of HL&P QA as opposed to

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. contractors):

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1. A review of' cables and terminations completed prior to February 4

20, 1987, and listed as not having a splice was performed to '

assure proper transmission of information from the EE-580 cards. -

This review has been completed and errors hcre been properly.

dispositioned by Engineering: evaluation or reinspection. ,

2. A computer.re-sort of terminations'and cabist which were worked after February 20, 1987,to assure that any work or rework done between February 20, 1987 and September 29, 1987, was listed which had not been reinspected. '

This review as well as a master sort to validate previous data 't utilized has been accomplished. -i

3. A review of cable and termination cards which resulted from (2) ~

above.

This review has been completed and errors have been properly dispositioned by Engineering evaluation or reinspection.

4. A review of electrical penetration termination. cards to assure splices to electrical penetrations have been' reinspected.

Two reviews have been conducted _of the electrical containment penetrations to ensure that Raychem applications required to be reinspected have been detected. Omissions made previously have been properly dispositioned by Engineering- ,

evaluation or reinspection. '

5. Review of the transfer of data from the master splice lists to l the reinspection data lists to identify omissions.

, This review has been completed and_ omissions have been preperly dispositioned by Engineering evaluation or reinspection.

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6. A' review by off-project Bechtel personnel to assure that the methodology and reviews are correct.

Two reviewers have completed their reviews on site and have confirmed completeness and accuracy of the current reviews.

The 1988. Unit i reviews resulted in the rework of six (6) additional splices from the approximate Unit 1 population of 2300 (it should be noted that none of the' additional rework was in the inboard-containment penetrations).

A plan for investigating Unit 2 will be complete by April 15, 1988.

V. Recurrence Control

1. To address the problem of thoroughness in identification of the complete scope, establishment of the root cause, correction of all deficient materials, and effectiveness in the corrective action .

process, revised guidelines will be incorporated into problem resolution procedures (SSP 67, "Project Corrective Action" and SSP -

65, "Reporting of Significant Situations, Problems or Concerns to Management"). This. action will be complete by March 31, 1988,

2. Overview instruction sessions will be initiated for management and other key individuals involved in the corrective action process.

This action will be complete by March 31, 1988.

VI. Safety Analysis As stated in our previous reports on this issue, HL&P has. determined that, if left uncorrected, this deficiency could have adversely affected the safety of operations. This item was reported pursuant to 10CFR50.55(e) and 10CFR21.

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