ML20212F389

Rev 1 to TVA Employee Concerns Special Program Sequoyah Element Rept 241.1(B), Cable Termination & Splices: Inadequate Splicing & Termination Practices & Procedures

ML20212F389
Person / Time
Site:	Sequoyah
Issue date:	02/23/1987
From:	Mcnutt G, Russell J, Stewart D TENNESSEE VALLEY AUTHORITY
To:
Shared Package
ML20212F190	List: ML20212F185 ML20212F275 ML20212F313 ML20212F342 ML20212F370 ML20212F389 ML20212F438 ML20212F458 ML20212F498 ML20212F529 ML20212F562 ML20212F581
References
241.1(B), 241.1(B)-R01, 241.1(B)-R1, NUDOCS 8703050078
Download: ML20212F389 (19)

Text

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• TVA EMPLOYEE GMCERNS REPORT NUMBER: -241.1(B)

SPECIAL PROGRAM

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REPORT TYPE: SEQUOYAH ELEMENT REVISION NUMBER: 1 TITLE: CABLE TERMINATION AND SPLICES Inadequate Splicing and Termination Practices and Procedures PAGE 1 0F 18 REASON FOR REVISION:

1. Revised to incorporate SRP and TAS comments, and to incorporate Section 10, Corrective Action.

f PREPARATION PREPARED BY:lb10aAn$t M e//7)T7 SIGNATURE / DATC

-(, _ REVIENS 7

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CONCURRENCES

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CEG-H: $ [ W d / Y#3[81 SRP:_\ 2-23-87 SIGNATURE DATE SIGNATURE

• DATE 7

p Mo APPROVEDkBd ECSP MANXGER anDATE' a

\ MANAGER OF NUCLEAR P0HER DATE u CONCURRENCE (FINAL REPORT ONLY)

• SRP Secretary's signature denotes SRP concurrences are in files.

!?R 288?" 8?888827 P PDR

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. TVA EMPLOYEE CONCERNS REPORT NUMBER: 241.1(B)

. SPECIAL PROGRAM

,m' REVISION NUMBER: 1 j PAGE 2 0F 18

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1. CHARACTERIZATION OF ISSUES:

Concern: Issues:

IN-85-392-001 a. The adequacy of cable splices is "What would happen with the questioned should underground cable large number of electrical systems become submerged from flooding splices located underground if in manholes or cable ducts.

the system became flooded?

1. Hould the splice hold up b. Plant safety is questioned as'a result under long exposure to of a splice (s) failure because of-moisture? flooding.

2. If the splice failed would a safety related problem c. Adequacy of the current design for occur? availability of redundant (back-up)

3. Hould a back-up system be systems is questioned in case of

, f activated?" cable splice failure (s).

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2. HAVE ISSUES BEEN IDENTIFIED IN ANOTHER SYSTEMATIC ANALYSIS? YES )( NO Documentation Identifiers:

o Identified by TVA SON ECTG Date 10/21/86 TVA SQN, ECTG Report, " Cable Problems in Manholes," R1 q

3. DOCUMENT NOS.. TAG NOS.. LOCATIONS OR OTHER SPECIFIC DESCRIPTIVE IDENTIFICATIONS STATED IN ELEMENT:

None.

4. INTERVIEH FILES REVIEHED:

File IN-85-392 was reviewed and no additional unreviewed information for Sequoyah was identified for the concern in this report.

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.- TVA EMPLOYEE CONCERNS REPORT NUMBER: 241.1(B) 2 ,

SPECIAL PROGRAM REVISION NUMBER: 1 PAGE 3 0F- 18

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5. DOCUMENTS REVIEHED RELATED TO THE ELEMENT:

4 See Appendix A.

6. WHAT REGULATIONS. LICENSING CODMITHENTS. DESIGN REOUIREMENTS OR OTHER 4 . APPLY OR CONTROL IN THIS AREA?

See Appendix A.

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j 7. LIST RE00ESTS FOR INFORMATION. MEETINGS. TELEPHONE CALLS. AND OTHER

)' DISCUSSIONS RELATED TO ELEMENT.

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See Appendix A.

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.8. EVALUATION PROCESS:

I s a. Reviewed available transcripts of NRC investigative interviews for additional information on the concerns.

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b. Reviewed Construction Specification G-38 and Modifications and Additions Instructions M&AI-4, M&AI-7, and M&AI-12.

a c. Reviewed SQN Inspection Instruction No.10. " Interconnecting 1 Cable Termination and Insulation Inspection."

d. Reviewed adequacy of installation procedures for splices provided by engineering and supplier.

e. Evaluated adequacy for submersibility of splices used.

. f. Evaluated effect of a splice failure on safety-related a, systems.

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g. Evaluated availability of redundant systems in case of a splice failure.

j h. Assessed validity of the concern and determined whether j problems exist at SON regarding cable splices in j ,

manholes / duct banks.

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TVA EMPLOYEE CONCERNS REPORT NUMBER:' 241.1(B)

SPECIAL PROGRAM REVISION NUMBER: I f PAGE 4 0F 18

9. DISCUSSION. FINDINGS. AND CONCLUSIONS:

Chronoloa_v:

02/14/75-- Raychem performs immersion tests for -TVA 10/15/76:

s 09/13/77: TVA, standard drawing, SD-E12.5.3, cable splicing, medium voltage, issued 5 10/30/79: Modifications and Additions Instructions, M&AI-12, j issued a

1 11/08/79: Modifications and Additions Instructions, M&AI-7, j issued 1

' f 03/20/81: TVA, standard drawing, SD-E12.5.6, cable splicing, 600 V, single conductor, issued 4

02/27/84: TVA, standard drawing, SD-E12.5.8, cable splicing,.

. 600 V, multiconductor, issued j 06/10/85:. Concern acknowledged by TVA for Hatts Bar 10/21/86: SQN, ECTG Report 304.03, " Cable Problems in Manholes,"

j '

issued SQN, Corrective Action Report, SQ-CAR-86-058, issued 12/19/86:

Discussion:

a .

The Employee Concern questions the consequences of potential

.N , flooding on electrical cable splices in manholes or handholes.

This issue was raised at HBN and is considered generic to all y plants including SQN since cable splice requirements are similar for all plants.

9.1 ADEQUACY OF SUBMERGED CABLE SPLICES 6

d Design Criteria SQN-DC-V-12.4 (App. A, 5.u; 04/26/74) specify that cables required to maintain the plant in safe shutdown or flooded condition be suitable for submersible operation. These cables shall be continuous (not spliced), unless qualified waterproof splices have been tested by the manufacturer according to TVA standard specifications, and have demonstrated their ability to meet performance requirements.

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TVA EMPLOYEE CONCERNS REPORT NUMBER: 241.1(B)

SPECIAL PROGRAM J' REVISION NUMBER:- 1 PAGE 5 0F 18 Ravchem Tests

As part of TVA's program to qualify cable splices that may be subject to design basis flood levels, TVA-provided cable samples to Raychem for test purposes. The samples-included low voltage (600 V) power and control cables, signal cables, and medium voltage' (8 kV) cables.

Raychem prepared several test configurations of. splices on low voltage power, control, and signal cables, using the Raychem Heat Shrink Tubing HCSF-N. The spliced cables were subjected to 100-day immersion in a pressurized cylinder and tested to pressure and temperature parameters supplied by TVA. Raychem reported test results (App. A, 5.v and w; 02/14/75 and 06/27/75) showing that the samples performed satisfactorily,

" f The medium. voltage.(8 kV) cable was spliced with a Raychem HVS-A-4-22 5/8 kV splice kit. The cable ends were terminated with Raychem high voltage termination HVT-I-A-2 kits. After electrical

. tests, the sample was subjected to long-term immersion testing in a pressurized cylinder. The cable loop was connected for current cycling tests. Raychem reported test results (App. A, 5.x and y; I,

06/18/76 and 10/15/76) showing that the sample performed h~ - satisfactorily and maintained original test values and integrity after the 100-day water pressure, load cycling test.

Upon completion of the Raychem tests, the TVA EEB, C: memo from Chandler to Pierce (App. A, 5.hh; 11/15/76), issued tr " Criteria and Procedures for Haking Splices of Insulated Cables in Manholes and Handholes," for interim use by Construction and for incorporation in standard drawings and Construction Specification G-38 (requirements were reflected in G-38 Rev. 2 [ App. A,' 5.f; 08/03/78]). Although it is not documented, the evaluation team assumed that the tests were

. performed to qualify Raychem heat shrinkable tubing installed prior to the tests and the issue of the cable splicing standards (App. A, 5.1, m and n). No records were, however, identified by the evaluation team to determine whether the tested splices were used in past applications and for how long.

Electrical Standard Drawinas and Procedures Governino Solices Following the Raychem tests, TVA issued three electrical standard drawings to delineate cable splicing procedures and materials:

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TVA EMPLOYEL CONCERNS REPORT NUMBER: 241.l(B)

SPECIAL PROGRAM J' REVISION NUMBER: 1 PAGE 6 0F 18

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o For splicing the class IE and nonclass lE medium voltage (5 to 15 kV) insulated conductor cables, TVA Electrical Standard Drawing SD-E12.5.3 (App. A, 5.1; 09/13/77) specifies the procedures, the splice kits, and the materials to be used.

SD-E12.5.3 supersedes TVA Electrical Standard Drawings 3081041 l (App. A, 5.z; 06/06/51) and 3081043 (App. A, 5.aa; 06/06/51).

It requires the use of Raychem heat shrink tubing over 3M tape splice kits for all class lE applications and for all splices located in manholes, handholes, and cable trenches.

o TVA Electrical Standard Drawings SD-E12.5.6 (App. A, 5.m; 03/20/81) and SD-E12.5.8 (App. A, 5.n; 02/27/84) outline the-procedures and the materials to be used for splicing 600 V (or less) insulated cables. Raychem heat shrinkable sleeving of various sizes is specified for these splices.

' [ TVA/SQN Modifications and Additions Instruction M&AI-7 (App. A, 5.c; 11/08/79) was developed upon completion of constructio n in 1979, and gives guidelines for splicing with reference to the electrical standard drawings described above, for details.

Similarly, M&AI-12 (App. A, 5.d; 10/30/79) outlines inspection instructions for cable terminations and splices. These H&AIs

( provide instructions for cable installations performed during

( modifications and additions to the facilities of the SQN plant.

Prior to TVA's cable splice qualification program and the issue of standards for cable splicing as discussed above, TVA indicated (App. A, 7.b; 01/10/87) that the governing document for splicing was the General Construction Specification G-38, Rev. O, (App. A, 5.f; 07/25/73), which provides a listing of Raychem heat shrinkable tubing to be used for various sizes of 600 volt splices, but not for medium voltage splices. Interviews of TVA personnel conducted by the evaluation team (App. A, 7.c; 01/25/87) indicate that

. Raychem heat shrinkable tubing was installed in accordance with vendor instructions prior to the issue of the cable splicing standards (App. A, 5.1, m and n). Although these splices have been in service under adverse conditions for some time without a failure, no splice installation records were identified and the implementation by construction of the cable splicing requirements as stated in Construction Specification G-38 could not be verified by the evaluation team.

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'. .- ~ TVA EMPLOYEE CONCERNSi REPORT NLMBER:c!24111(8)~

SPECIAL PROGRAM

%< REVISION. NUMBER: 1 1 PAGE 7 OF 18 p Inspection Guidelines LTo . furnish. guidelines for inspection-of terminations.and splices

, during plant construction activities, TVA's Division of

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Construction issued.the SQN Inspection: Instruction (II) No.10- .

(App.LA, 5.b; 05/26/77). The inspection instruction requires visual . inspection of . cables, splices,-and terminations as well as.

-continuity and insulation testing (this is discussed in detail in

-Sequoyah Element Report 241~.3). The document also specifies that a

-splice card be filled out and signed upon successful completion of

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the inspection and be processed in accordance with the Quality Assurance (QA) Program and the requirements of SNP Construction Procedure No. P-8 (App. A, 5.ff; 04/24/72).

-Identified Problems in-Manholes

• f. The ECTG Report No. 304.03 (App. A,-5.i;.10/21/86) evaluated'two.

- concerns identified at- HBN and at BLN: that electrical manholes are-in a: disorganized. state. These concerns were expanded at SQN to include water in the manholes. The report indicated.that applicable documents were reviewed and interviews conducted with cognizant engineering, craft, and electrical maintenance personnel, and a sample of.six manholes was inspected.

I' The SQN procedure that covers the installation of cables is M&AI-4

, (App. A, 5.cc; 10/30/79); however, it does not include a preventive i- . maintenance or housekeeping program for electrical manholes. The inspection team found that the manholes contained various amounts of water and some had debris lying on the floor. The cables in all the manholes were coated with mud. At several locations, the sump pumps or their controls were not in an operating-condition. On the basis of the findings from these sample inspections'and interviews

!> with cognizant personnel,.the report concluded that although the 9 . cable arrangement in the manholes inspected was generally good,

[ manholes need to be cleaned and debris removed. There also appears a to be a widespread problem with water in the manholes.

3:

1 NRC-Identified Problems with Heat Shrinkable Tubing Installation The NRC issued IE Information Notice No. 86-53 (App. A, 5.g; L 06/26/86) to alert licensees to a potentially generic safety

, problem involving improper installation of heat shrinkable tubing over electrical splices and terminations. The notice states that

.: installation discrepancies with Raychem heat shrinkable tubing have

" been reported at several plants including Hatts Bar and Bellefonte.

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'., . TVA EMPLOYEE CONCERNS REPORT NUMBER: 241.l(B)

. SPECIAL PROGRAM

. REVISION NUMBER: 1 PAGE 8 0F 18 In response to the NRC notice, SQN issued SMI-0-317-42, "Walkdown Procedure for 10CFR50.49 Splices" (App. A, 5.gg; 01/06/87).

Although the SHI does not specifically address cable splices in manholes, the associated Corrective Action Report (CAR) No.

SQ-CAR-86-058 (App. A, 5.h; 12/19/86) notes that, " Corrective action must address, in addition to correcting known examples, the actions taken to identify and correct similar occurrences."

Although the evaluation team has not identified any documentation of improper installation of splice kits in manholes, several instances of improper installation of heat shrinkable tubing have been found at SQN under the SMI-0-317-42 program (splices in manholes are not covered under 10CFR50.49). Cognizant TVA personnel interviewed (App. A, 7.a; 12/30/86) stated that they are not aware of any cable splice problems'in manholes at SQN.

Examination of Solice Cards l'

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The evaluation team reviewed a number of sample splice cards dating from 1977 to 1980 (no earlier records for splices were identified). The cards state that splices have been made in compliance with Inspection Instruction No. 10 (App. A, 5.b; 05/26/77). However, the splice cards do not show what material was used or to what standard (drawings or manufacturers' splice

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details) the splices conformed. Although splice locations are recorded on the card, no master document was identified for all splice locations throughout the plant (App. A, 7.c; 01/25/87).

9.2 POTENTIAL FLOODING EFFECTS Design Criteria SQN-DC-V-12.4 (App. A, 5.u; 04/26/74) define the design considerations and requirements for electrical cables installed in underground conduit banks between the power plant and the associated remote buildings, such as the diesel generator

, building, the essential raw cooling water (ERCH) pumping station, and the intake pumping station. All cables interconnecting class 1E electrical equipment between the power plant and associated remote buildings are installed in two independent conduit banks:

one for each class 1E train A or 8 as defined in Design Criteria SQN-DC-V-12.2 (App. A, 5.ee; 08/23/74) and as committed to in the FSAR Section 8.3.1.4.2 (App. A, 5.dd).

The evaluation team verified that divisionalized cables in conduit banks are adequately separated in compliance'with the design criteria (App. A, 7.c; 01/25/87). A postulated failure of a cable splice in one class lE train due to flooding should not affect the function of the redundant train if cable splices have been installed correctly in accordance with existing procedures.

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' TVA EWLOYEE CONCERNS REPORT NUMBER: 241.l(B).

SPECIAL PROGRAM

.1 - REVISION NUMBER: 1 PAGE 9 0F ~18

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However, simultaneous flooding of incorrectly installed cable splices in redundant class lE manholes could result in a common mode failure.

9.3 REDUNDANCY The design and installation of class lE cables in independent conduit banks are based on the requirements'for preserving.the

-independence of redundant class IE systems as stated in the FSAR (App. A,.5.dd). Redundant systems are provided so that single failures,' including the failure.of a cable splice of-a_ redundant.

system, will not have an adverse affect on the safety of the plant. Upon' loss of one class lE train,-the design allows the plant to meet the single failure criteria with the remaining available class lE train.

[ Findinos:

a. Review of the design and construction documents revealed that.

current procedures, standards, and inspection instructions provide sufficient information to make qualified cable splices on medium voltage (5 to 15 kV) and. low voltage (600 V or_less) cables. Documentation review (G-38, Rev. O and

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(" Raychem tests) and interviews conducted by the evaluation

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team also suggests that, prior to the issue of the " Criteria

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and Procedures for Making Splices of Insulated Cables'in Manholes and Handholes" (App. A, 5.hh) and the electrical standard drawings SD-E12.5.3 (medium voltage) and SD-E12.5.6 and SD-E12.5.8 (low voltage), submersible cable splices,

! including Raychem heat shrinkable tubing, were installed.

, However, no evidence supporting adequacy of installation.or

installation records of submersible cable splices could be identified. Furthermore, G-38 does not address splices for

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. medium voltage cables prior to Rev. 2.

! Improper installation of heat shrinkable tubing over electrical splices, as stated in the NRC IE Information

, Notice, has been identified in CAR No. SQ-CAR-86-058. The

! current program under SMI-0-317-42 is, however, limited to correcting the problem only for splices on equipment covered

under 10CFR50.49. No program is currently in place to review the adequacy of splice installation for cables in manholes.

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No splice cards for cable splices prior to 1977 were identified, and the reviewed splice cards do not record

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materials used. In addition, the evaluation team found that p existing records are insufficient to determine the type, number, and location of cable splices in manholes. Neither

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'. - TVA EMPLOYEE CONCERNS REPORT NUMBERi 241.l(B)-

, SPECIAL PROGRAM

, REVISION NUMBER: 1-PAGE 10 0F 18

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could the evaluation team identify use of cable splices as tested by Raychem for TVA, prior to the issue of the current electrical standard drawings for splicing procedures.

b. The evaluation team determined.that cables of redundant class 1E trains are routed through independent conduit banks to the remote buildings in conformance with the design criteria.

Although the class 1E cables have been in service under operating conditions for some time, existing records are insufficient to verify the adequacy of the cable splices.

Due to possible simultaneous flooding of redundant class 1E manholes, a potential common mode failure of redundant class lE cable splices cannot be ruled out. A limited walkdown of six manholes identified in ECTG Report No. 304.03 confirmed that manholes are currently flooded, resulting in cables coated with mud, and debris lying on the floor.

c. The design of class lE cable systems.is based on-requirements for preserving the independence of redundant class lE systems. However, because of insufficient cable splice records and the potential common mode failure as stated above, the availability of a redundant class 1E train for safe shutdown of the plant cannot be guaranteed.

Conclusions:

, a. The issue of the adequacy of cable splices in. flooded manholes is valid, although no splice failures were identified.

Construction Specification G-38 provided limited information regarding installation of submersible cable splices (medium voltage splices were not addressed prior to Rev. 2) before the effective issue date of the current installation procedures, and no master document listing all splices throughout the plant

, was found. Also, splice cards for cable splices prior to 1977 could not be found, and the available splice cards from 1977 on do not record materials used. Therefore, the adequacy of the splices cannot be verified.

, b. The issue of possible safety-related problems should a splice

! fail under flooded conditions is valid. Although cables of redundant class IE trains are routed through independent conduit banks, the adequacy of the cable splices for service under flooded conditions cannot be verified.

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.:" TVA EMPLOYEE CONCERNS REPORT NUMBER: 241.1(B)

SPECIAL PROGRAM REVISION NUMBER: 1:

PAGE 11 OF'18'

c. ~The issue of back-up system activation in case of a cable splice failure.in one class 1E train is-valid. Although current redundant class IE system de' sign is adequate, the availability of a redundant class,1E train for safe shutdown has to be evaluated in view of a potential common mode failure of class'1E cable splices due to simultaneous flooding of redundant class.1E manholes.

10. CORRECTIVE ACTION:

In response to the findings above which require corrective actions as identified by corrective action tracking documents (CATDs) 241.01 SQN 01,.241.01 SQN 02 and 241.01 SQN 03 (to be identified as CATD-1, CATD-2 and CATD-3 respectively), TVA has generated

{- corrective action plans (CAPS) as identified by transmittal-t TCAB-076 dated 02/17/87 (App. A, 5.jj). This transmittal has been-reviewed and found to contain three Corrective Action Plans of Employee Concern Investigation Tracking Checklists, one for each of three CAPS.

The CAP for CATD-1 need not be completed prior to restart. The i problem descriptions of CATD-1 indicates that current cable splicing standard drawings and M&AI's provide adequate instructions for cable splicing; however, prior to these standards, no evidence of adequate procedures for installation of submersible splices existed, and no splice ca M s prior to 1977 were found, and splice cards do not record materials used.

4 To respond to this problem, the corrective action, modified as discussed with TVA in the 02/18/87 telecon (App. A, 7.d), will:

o Determine if the lack of documentation is a condition adverse to quality (CAQ) and write CAQ if required. This proposed action is adequate to satisfy CATD-1.

i.

The second CAP responds to CATD-2, and its completion is not required prior to restart. The problem description of CATD-2 was

" Insufficient records exist to determine the type, number and location of cable splices in manholes." The action plan for eliminating this problem is to document the type of material used to waterproof the splices, and determine the number and location of all class 1E/CSSC splices in the manholes and handholes. Also l M&AI-7, currently under revision, will require unique identification and documentation of location, cable number, j materials used, etc., for future installations of 1E/CSSC splices.

l This action should rectify the problem outlined in CATD-2.

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TVA EMPLOYEE CONCERNS REPORT NUMBER: 241.1(B)

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SPECIAL PROGRAM REVISION NUMBER: 1 l[-

f,- PAGE 12 OF 18 j.

I,I i The CAP for CATD-3 must be completed prior to restart. This problem description of CATD-3 indicates that SQ-CAR-86-058 identifies inadequacies in application of Raychem Products. No fl 4 program has been identified addressing adequacy of installation of Raychem products on electrical-splices in manholes.

g g To respond to this problem, TVA will:

o Prepare a Special Maintenance Instruction (SMI) to inspect all class 1E/CSSC cable splices in manholes and handholes to determine if they are adequate for their application.

Write a CAQ for inadequacies and a Work Request (WR) to

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o replace all inadequate 1E/CSSC splices identified.

g These actions should ensure that the installed splices are adequate for operation of the plant.

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, TVA EMPLOYEE CONCERNS REPORT NUMBER: 241.l(B)

. . SPECIAL PROGRAM

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REVISION NUMBER: 1 PAGE 13 0F 18 APEfNQIX_8

5. DOCUMENTS REVIENED RELATED TO THE ELEMENT:

a. TVA memo R. H. Cantrell to C. C. Mason, " Evaluation of the

{ Adequacy of Installed Class lE Cables," (843 851203 915),

(12/02/85)

, b. SQN Inspection Instruction No. 10, Sections 7 and 8, i

, " Interconnection Cable Termination and Insulation 2 Inspection," R7, (05/26/77), (SQN 840322 018), R16, (03/30/83)

c. SQN Modifications and Additions Instruction M&AI-7,

" Inspection Criteria of Cables or Internal Panel Hiring,"

A Section 3.0, R0, (11/08/79)

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d. SON Modifications and Additions Instructions M&AI-12,

" Interconnecting Cable Termination and Insulation

( Inspection," Section 7.0, R0, (10/30/79) 6

e. Letter from B. J. Youngblood, NRC, to S. A. White, TVA, (B45 860714 832), with the attached transcript of the L

( investigative interview conducted by the NRC on 02/21/86 at

( the First Tennessee Bank Building in Knoxville, TN, (06/23/86)

[ f. General Construction Specification G-38, " Installing r Insulated Cables Rated Up to 15,000 Volts," R0, (07/25/73)

R1, (10/22/75) R2, (08/03/78) and R8, (03/17/86)

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g. NRC Office of Inspection and Enforcement, Information Notice No. 86-53, " Improper Installation of Heat Shrinkable Tubing,"

(06/26/86)

h. SQN, Corrective Action Report No. SQ-CAR-86-058, (12/19/86)

. 1. TVA, SQN, ECTG Report No. 304.03, " Cable Problems in Manholes," R1, (10/21/86)

j. TVA memo from R. H. Cantrell to K. H. Whitt, " Employee L Concern Evaluation: Concern No. IN-85-392-001 - Underground j Electrical Splices - Hatts Bar Nuclear Plant," (07/16/85) j

k. TVA, Special Maintenance Instruction SMI-0-317-4, R0 (1979) l

1. TVA, Electrical Standard Drawing SD-E12.5.3, " Cable Splicing i Medium Voltage (5-15 kV) Insulated Conductors," R0, i (09/13/77), R2, (05/03/84), R3, (05/20/86) 0832D - 02/17/87

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REPORThl2WER: 241.l(B)!

. sTVA EMPLOYEE 00NCEkidS ~

_-' SPECIAL PROGRAM 1"-

.-.c' '

REVISION Ml#RER: 1 ,

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' APPENDIX A (cont'dl

, m. TVA, Electrical Standard Drawing SD-E12.5.6, " Cable Splicing 600 V (or less) Insulated Cable," R6, (03/20/81), R8, (09/19/86) } .

-n. TVA, Electrical Standard Drawing SD-E12.5.8, " Cable Splicing and Term. 600 V (or less) Multi-conductor Insulated Cable,"

R2, (02/27/84), R4, (07/31/86) <~ T

o. 3M Product Data Sheets foi Tape and InlinedTaped Splices, 5-25 kV No. C-2047. Rev. Als'(10/26/71)

p. Raychem Nuclear Products Guide

.q. Thomas and Betts Prodiacts catalog, Compression Connectors ,

' f. /

r. Raychem High Voltage Splice Kit 8 kV Class, Dwg. No. .

HVS-A3-2-4/O-TVA (05/31/77)-

t s, Raychem High Voltage Splice Kit, 8 kV Class, Dwg. No,

, HVS-A3-250-500-TVA (05/31/77) ,

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7e t. Raychem High Voltage Splice Kit, 8 kV Class,,Dwg. No. '

HVS-A3-750-1000-TVA (05/31/77) '

u. ' Design Criteria- SQN-DC-V-12.4, " Design Criteria for Cable support Systems for Capability of Testing Cables for the '

Design Basis Flood," Rev. 1, (04/26/74).

v. Raychem, Immersion Tests for TVA, Interim Report, TSL4618, (02/14/75) ,

s N ~

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. w. - F.aychem, Iraersion Tests fopTVA, Report #2, (Raychem WCSF-L (

Catfle Splices), TSL4618, (06/27/75) '

x. Raychem, Water Immersion Testing Interim Report #1, TVA +

i Cable '5-8 kV Splice Tertir,g, '

TVA 8 W Shielded Power Cables, '

(06/18/76) , . s

y. Raychem, Water-Immersion Testing of 5-8 kV Caychem Splice on g

IVA 8 kV Shielded Power Cable, (10/15/76) ,

7

!. z. TVA, Electrical Standard Drawing 3081041 R5, " Straight Splice, Types ROSJ, PSJ and CPSJ, 5-15 kV Shielded Cable,"

j (06/06/51) j 08320 - 02/17/87 I

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g .

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'L za TVA EMPLOYEE CONCERNS REPORT NIMBERr 241.1(B)

> .. .m SPECIAL PROGRAM

(,* . M k { e

' REVISION NUMBER: 1-d .# PAGE 15 0F 18 -

g g[. <

v M ',

,7 h:

i APPENDIX A (cont'dI

• aa. TVA{ Electrical Standard Drawing 3081043, R2, " Straight Splice, Type AVCSB, 5-8 kV Shielded Cable, (06/06/51) y '

/

,t - u bb. General Construction Specification.G-4, " Installing Insulated-

[ i / 4 Cables Rated Up to 15,000-Volts Inclusive," (01/09/73)-

) cc. SQN Modifications.and Additions Instruction M&AI-4,

• ' <, " Installation of Control, Power and. Signal Cables," RO, s . < (10/30/79), R9 (08/13/86)

g. s

$. dd. SQN FSAR', Section 8.3.1.4.2, Amendment 1. " Cable Routing and l: _

( 0 Separation Criteria" ee. Dasign Criteria SQN-DC-V-12.2, " Separation of Electrical y , .f .

Equipment and Miring " Rev. 3, (08/23/74) k  ; ff. SNP. Construction Procedure No. P-8, " Preparation, Review, i - ~ Handling, and Temporary Storage of Quality Assurance

! Records," R0, (04/24/72), (SQN 831017 037), R1, (01/25/74),

i l - (SQN 831017 038), R16, (02/17/83), (SON 831017 063), retitled

[ jy 9

" Quality Assurance Records" F5 :

~

7' gg. TVA SQN, Special Maintenance Instruction SMI-0-317-42, "Malkdawn Procedure for 10CFR50.49. Splices," R2, (01/06/87) b p

TVA memo from F. H. Chandler to R. M. Pierce, "Sequoyah and j T hh.

s - Hatts Bar Nuclear Plants, Units 1 and 2. Materproof Splice a " i for 8-kV Cable - SQN-127A and HBN-127A " (EEB 761116 932),

~ '; (11/15/76) and attached " Criteria and Procedures for Making

}3 a

N l Splices of Insulated Cables in Manholes and Handholes" r

. ii. IEEE Std 48-1975 " Standard Test Procedures and Requirements for High-Voltage. Alternating-Current Cable Terminations, (05/09/75)

T' jj. Letter from G. R. McNutt to G. L. Parkinson, TCAB-076,

] " Correction Action Plan," (02/17/87).

k Y, 6. NHAT REGULATIONS. LICENSING CGMITMENTS. DESIGN REOUIREMENTS OR OTHER

}; '

APPLY OR CONTROL IN THIS AREA?

a. SQN FSAR, Section 8.3.1.4.2, Amendment 1, " Cable Routing and Separation Criteria" i

s 08320 - 02/17/87 y,_. -.

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o@ E TVA EW LOYEE CONCERNS REPORT'RBRER: 241.1(B).

j H. . .. . SPECIAL PROGRAM -

%, ; ' W REVISION NUMBER: 1 w "

! M PAGE 16 0F 18

'- t

[:, . K APPENDIX A (cont'd)

[ y I h b. Design Criteria SQN-DC-V-12.2, " Separation of Electrical j ^

Equipment and Hiring," Rev. 3, (08/23/74) t -

h c. Design Criteria SQN-DC-V-12.4 " Design Criteria for Cable p i Support Systems for Capability of Testing Cables for the p f; Design Basis Flood," Rev. 1 (04/26/74) e

. d. . General Construction Specification G-58, "Insta111ng' Insulated Cables Rated Up to 15,000 Volts," R2, (07/25/73).

and R8, (03/17/86)

SQN Inspection Instruction No. 10, Sections 7 and 8, o R- e.

" Interconnection Cable Termination and Insulation Inspection," R7, (05/26/77), (SQN 840322 018), R16, (03/30/83) lit " ( f. SNP Construction Procedure No. P-8.- " Preparation, Review,-

l Handling, and Testbrati Storage of Quality Assurance i Records," R0, (04/2 4 72), (SQN 831017 037), R1, (01/25/74),

(SQN 831017 038), R16, (02/17/83), (SQN 831017 063), retitled y ,

" Quality Assurance Records"

gm

% g. TVA, Electrical Standard Drawing SD-E12.5.3, " Cable Splicing Medium Voltage-(5-15 kV) Insulated Conductors," (09/13/77) s 1 ,

'h. TVA, Electrical Standard Drawing SD-E12.5.6 " Cable Splicing 1 600 V (or less) Insulated Cable," R6, (03/20/81)

) 1. TVA, Electrical Standard Drawing SD-E12.5.8, " Cable Splicing 4;  ; and Term. 600 V (or less) Multi-conductor Insulated Cable,"

3- '

R2, (02/27/84)

. j. SQN Modifications and Additions Os;ruction M&AI-7,

" Inspection Criteria of Cablu . r U ;ernal Panel Hiring," R0, Section 3.0, (11/08/79) u k. SQN Modifications and Additions Instructions M&AI-12 j " Interconnecting Cable Termination and Insulation

!} Inspection," R0, Section 7.0 (10/30/79)

[-

7. LIST RE00ESTS FOR INFORMATION. MEETINGS. TELEPHONE CALLS. AND OTHER l' DISCUSSIONS RELATED TO ELEMENT.

1 b a. Telecon between F. Jaksche and I. Don-Doncow, Bechtel, and P.

1 Nesbitt and G. Clift, TVA, Information on cable splicing

} procedures and standards at SQN, IOM 573 (12/30/86) p, 1

L. 0832D - 02/17/87

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TVA EMPLOYEE CONCERNS REPORT NUMBER: 241.1(B)

SPECIAL PROGRAM REVISION NUMBER: 1 PAGE 17 OF 18

b. Telecon between F. Jaksche, Bechtel, and G. Clift, TVA, Infor1mation on earlier issues of cable splicing standards and procedures at SQN, IOM 574 (01/10/87)

c. .Bechtel memo from S. Mable to I. Don-Doncow, "SQN Electrical Splices Located Underground." Review of cable installation-records and personnel interviews, IOM 575 (01/25/87)

d. Telecon between F. Jaksche, I. Dort-Doncow, Bachtel, and X. Lyke, TVA, Revision of CAP for CATD. 241.01 SQN 01, IOM 656 (02/18/87).

(

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08320 - 02/18/87

' TVA EMPLOYEE CONCERNS REPORT NUMBER: 241.1(B)-

). ,

SPECIAL PROGRAM i ,* c' REVISION NUMBER: 1 PAGE 18 0F 18 Ic p CATD LIST The following CATDs identify and provide corrective actions for the findings included in this report:

241 01 SON 01 (02/13/87)

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-241 01 SQN 02 (02/13/87) 241 01 SQN 03 (02/13/87)

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REFERENCE - ECPS120J-ECPS121C TENNESSEEVALLEYAUTHORIh FREQUENCY - REQUEST PAGE -

l'9 -

OFFICE OF NUCLEAR POWER RUN TIME - ISi21 DNP - ISSS - RHM EMRLOYEE CONCERN PROGRAM SYSTEM (ECPS) RUN DATE - 12/02 EMTMF EMPLOYEE CONCERN INFORMATION 3ATEGORY: EN DES PROCESS 3 OUTPUT SUBCATEGORY: 24101 INAD SPLICING & TERMINATION PRACTICES & PROCEDURES S GENERIC KEYHORD A H APPL QTC/NSRS P KEYWORD B CONCERN SUB R PLT BBSH INVESTIGATION S CONCERN KEYHORD C NUMBER CAT CAT D LOC FLQB REPORT R DESCRIPTION KEYHORD D IN 392-001 EN 24101 N HBN YYYY N-85-392-001 NO HHAT HOULD HAPPEN HITH THE LARGE NUM DESIGN RELATED T50012 REPORT BER OF ELECTRICAL SPLICES LOCATED UN l SPECIAL PROCESS '

DERGROUND IF THE SYSTEM BECAME FLOOD ELECTRICAL ED 1. HOULD THE SPLICE HOLD UP UNDER CABLE LONG EXPOSURE TO MOISTURE? 2.IF TH E SPLICE FAILED HOULD A SAFETY RELAT ED PROBLEM OCCUR? 3. HOULD A BACK-U P SYSTEM BE ACTIVIATEDT 1 CONCERNS FOR CATEGORY EN SUBCATEGORY 24101 1

.