ML20214V522

Identifies Scope of Wire & Cable Related Activities NRC Will Focus on During Site Visit During Wk of 870615.Purpose of Visit Is to Gather Info Re Root Cause of Cable Installation Problems & Util Corrective Action Program

ML20214V522
Person / Time
Site:	Rancho Seco
Issue date:	06/08/1987
From:	Kalman G Office of Nuclear Reactor Regulation
To:	Andognini G SACRAMENTO MUNICIPAL UTILITY DISTRICT
References
TAC-65195, NUDOCS 8706120138
Download: ML20214V522 (7)

Text

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w 8 JUN 1987 i

Docket No. 50-312 Mr. G. Carl Andognini Chief Executive Officer, Nuclear Rancho Seco Nuclear Generating Station 14440 Twin Cities Road Herald, California 95638-9799

SUBJECT:

RANCHO SEC0 WIRE AND CABLE PROGRAM (TAC NO. 65195)

The purpose of this letter is to identify for you the scope of wire and cable related activities the staff would like to focus on durir.g the site visit planned for the week of June 15, 1987. We expect that you will use this information to prepare for the meetings and inspection activities.

As discussed with Mr. Jim Gough of your staff the NRC inspection team will consist of at least one person from NRR (Mark Caruso), one person from the NRC Region V office (Bill Ang) and an NRC Contractor (George Morris). The purpose of their visit is to gather information regarding the root cause of the cable installation problems identified at Rancho Seco and your corrective action program. The information will be used to prepare sections of the staff's Rancho Seco restart safety evaluation.

As you are aware, the staff has expressed its concerns and interests regarding resolution of wire and cable issues in the May 1, 1987 letter from John Martin and during our meeting on May 6, 1987. The particular issues that the staff wishes to focus on during the upcoming visit are outlined in Enclosure 1 to this letter.

Enclosure 2 to this letter lists the specific task items from your action plan (Enclosure to June 1, 1987 letter from G. Andognini) which in our view should yield responses to our questions in Enclosure 1. Therefore, we would like to meet with cognizant personnel and discuss these specific items during our visit.

We would like the meetings to be informal, small group, interview type sessions.

Complete written responses to the questions are not required at the time of our visit. However, we request they be provided no later than July 31, 1987.

Enclosure 3 to this letter provides a list of specific inspection activities we wauld like to accomplish while on-site.

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2 The above agenda has been discussed informally between Mark Caruso (NRR) and Jim Gough of your staff. If you have any questions please contact Mark Caruso.

Sincerely, Original signed W George Kalman, Project Manager Project Directorate V Division of Reactor Projects III, IV, V

& Special Projects cc: See next page

Enclosures:

As stated Office: RS $DV $ PDV Surname: M uso/tg h1An $1 ton Date: 0 0/ /87 0

/87

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Mr. G. Carl Andognini Rancho Seco Nuclear Generating Chief Executive Officer, Nuclear Station Sacramento Municipal Utility District cc:

Mr. David S. Kaplan, Secretary Mr. John Bartus and General Counsel Ms. JoAnne Scott Sacramento Municipal Utility Federal Energy Regulatory Commission District 825 North Capitol Street, N. E.

6201 S Street Washington, D.C. 20426 P. O. Box 15830 Sacramento, California 95813 Thomas A. Baxter, Esq. Mr. Robert Roehler Shaw, Pittman, Potts & Trowbridge Sacramento Municipal Utility District 2300 N Street, N.W. Rancho Seco Nuclear Generating Station Washington, D.C. 20037 14440 Twin Cities Road Herald, California 95638-9799 Mr. John V. Vinguist Acting Manager, Nuclear Licensing Mr. James Gough Sacramento Municipal Utility District Bechtel Corporation '

Rancho Seco Nuclear Generating Station Rancho Seco Nuclear Generating Station 14440 Twin Cities Road 14440 Twin Cities Road Herald, California 95638-9799 Herald, California 95638-9799 Mr. Robert B. Borsum Babcock & Wilcox Nuclear Power Generation Division Suite 220, 7910 Woodmont Avenue Bethesda, Maryland 20814 Resident Inspector / Rancho Seco c/o U. S. N. R. C.

14440 Twin Cities Road Herald, California 95638 Regional Administrator, Region V U.S. Nuclear Regulatory Commission 1 1450 Maria Lane, Suite 210 l Walnut Creek, California 94596 l Mr. Joseph 0. Ward, Chief Radiological Health Branch State Department of Health Services 714 P Street, Office Building #8 Sacramento, California 95814 Sacramento County Board of Supervisors 827 7th Street, Room 424 l Sacramento, California 95814 l Ms. Helen Hubbard P. O. Box 63 Sunol, California 94586 l

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' ENCLOSURE 1 l NRC REQUEST FOR INFORMATION REGARDING CABLE INSTALLATION PROBLEMS

1. Describe the installation procedures and practices which have been used at Rancho Seco to ensure that licensing criteria for safety related class IE and Appendix R safe shutdown and associated cable are met. Your response should cover original cable installation performed by Bechtel as well as new cable installation and re-routing which has taken place since the plant was put into operation. The response should address the following specific topic areas:

a. Provide the detailed sequence of events involved in the design and installation of new cable and re-routing of previously installed cable.

b. Provide the Quality Assurance Procedures applicable to control of cable design, installation and re-routing; including verification, quality record control, review and approval authority and management oversight,

c. A clear description of the significant changes which have taken place in either installation or quality assurance procedures (e.g.,

change in computer tracking systems from EE553 to CRTS).

2. Based on the response to question 1 and the results of IAG Group investigations of the cable routing errors provide a clear description of the events and circumstances which led to:

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a. The misrouting of cable described in LERS 85-16 Rev. 1, 86-10, 87-13, 87-26 and that discovered recently during implementation of the sampling plan.

b. The discrepancies between the cable routing in the plant and that contained in the quality assurance records and Cable Raceway Tracking System.

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• ENCLOSURE 2 WIRE AND CABLE ACTION PLAN ITEMS TO BE DISCUSSED DURING JUNE 15-19 MEETING AT RANCHO SECO i SMUD ACTION PLAN ITEM NUMBER DESCRIPTION-n 24 ~

Determination of cause of redundant cabling in same fire area (LER 86-10) 25 Determination of cause of redundant instrument cables routed through same fire

area (LER 87-13) 15 Formal and complete root cause evaluation ,

of all cable problems 5 Demonstrate that no Bechtel Generic Design Problem exists based on root cause evaluation of LER 85-16 Revision I and 2.

7 Justification for not sampling original cable population i

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s ENCLOSURE 3 INSPECTION ACTIVITIES FOR WEEK OF JUNE 15-19

1. Inspection of cable and routing which.was subject of LERs 86-10 and 87-13; including walkdown of re-routed cable.

2. Witness a signal tracing in prr)gress.

3. Demonstration of CRTS including data entry, input verification and examples of outputs.

4. Inspection of cable pull cards for 1E cable.

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t Distribution Copies:

5. Docket Files'?

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NRC'PDR^~

Local PDR PDV Plant File GHolahan PKreutzer MCaruso GKnighton 0GC-Bethesda DHagan EJordan JPartlow TBarnhart(4)

WandaJones EButcher LMiller, NRC-RV AD'Angelo, NRC-Rancho Seco Bang NRC-RV ACRS(10)

GPA/PA ARM /LFMB JLee l

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