ML20215F225

Insp Rept 50-353/87-06 on 870504-15.Deviations Noted: Licensee Has Not Provided Evidence to Demonstrate Completion of Design Changes Required or Physical Installations to Provide for Required Voltage Levels to Class 1E Components

ML20215F225
Person / Time
Site:	Limerick
Issue date:	06/08/1987
From:	Anderson C, Woodard C NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
To:
Shared Package
ML20215F191	List: ML20215F188 ML20215F207 ML20215F225
References
50-353-87-06, 50-353-87-6, IEIN-77-01, IEIN-77-1, IEIN-82-04, IEIN-82-4, NUDOCS 8706220285
Download: ML20215F225 (9)

See also: IR 05000353/1987006

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U.S. NUCLEAR REGULATORY COMMISSION

REGION I

Report No, 50-353/87-06

Docket No. 50-353

License No. CPPR-107 Priority - - Category B

Licensee: Philadelphia Electric Company

2301 Market Street

Philadelphia, PA 19101

Facility Name: Limerick Nuclear Generating Station, Unit 2

Inspection At: Limerick Generating Station

Inspection Conducted: May 4-15, 1987

Inspectors: E [/#b Deg & /SB7

Carl H. Woodard',~ Reactor ' Engineer date

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Approved by: C 37

C. JUAnderson, Chief Plant Systems date  !

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Section, DRS

Inspection Summary: Inspection on May 4-15, 1987 (Inspection Report

No. 50-353/87-06)

Areas Inspected: Routine, onsite, unannounced inspection by one region-based i

inspector of activities pertaining to the safety-related electrical systems  !

and components.

Results: One deviation and two unresolved items were identified.

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PDR ADOCK 0500

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DETAILS

1.0 Persons Contacted i

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1.1 Philadelphia Electric l

• G. Lauderback, Quality Assurance Branch Head

• P. Naugle, Assistant Construction Superintendent

• J. Harding, Lead Facility Engineer

• T. Tucker, Quality Assurance Engineer

• J. Corcoran, Manager, Quality Assurance

• P. DiPaolo, Quality Assurance Branch Head

G. Tepper, Electrical Engineer

W. Shraff, Electrical Department Branch Head

W. Coyle, Electrical Project Engineer

C. Tuttle, Electrical Project Engineer

R. Panunto, Electrical Facilities Engineer

T. Dey, Quality Assurance Engineer.

1.2 Bechtel

• W. Bradley, Quality Assurance Engineer

• S. Loofbourrow, Quality Assurance Engineer

• G. Kelly, Quality Assurance Engineer

• D. Harder, Qaulity Assurance Engineer

• B. Mukherjee, Project Engineer

M. Drucker, Quality Assurance Engineer

G. Bell, Quality Assurance Engineer

G. Konecny, Quality Assurance Engineer

K. Stout, Quality Assurance Engineer

M. Dixon, Cable Yard Foreman

M. Twardowski, Lead Long Term Maintenance Engineer

R. Sewell, Electrical Engineer

N. Roy, Electrical Engineer

J. Schwamb, Lead Maintenance Quality Assurance Engineer

1.3 Nuclear Regulatory Commission

• R. Gramm, Senior Resident Inspector

• J. Kaucher, Resident Inspector

• Attendees at exit interview on May 14, 1987.

2.0 Procedure Review

A sample of the licensee's documents associated with the procurement,

storage, installation and inspection of the class IE electric system

components including wire and cable as listed in Attachment A were

reviewed by the inspector.

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This review was to ascertain whether the technical elements of the

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licensee's safety analysis report (SAR) and NRC requirements had been

adequately translated into applicable documents. Also, to determine if

the construction specifications, drawings, work procedures and

instructions were of sufficient detail and clarity to perform and control

the work,

No deficiencies were identified.

3.0 Record Review

A sample of licensee records, associated with the class IE electric

systems was reviewed by the inspector. These records are listed in

Attachment A.

This review was to ascertain the effectiveness of the licensee quality

assurance program in the areas of procurement, storage, work activities

and inspection of the class IE electric systems to assure that the

systems and components perform their safety-related functions. No

deficiencies were identified.

4.0 Electrical Components and Systems - Work Observation

The inspector observed work in progress and completed work to determine

whether activities related to safety-related electrical systems and

components are being controlled and accomplished in accordance with NRC >

requirements, safety analysis report commitments, and licensee

procedures.

4.1 Electrical Installations

The following installed electrical systems and components were

observed by the inspector.

- The B Train Emergency Diesel Generator System

- 4 Kv Safeguards Switchgear Panels

- 480 Volt Safeguards Load Center Panels

- Reactor Enclosure Damper Indicator / Control / Test Panel

- ATWS 4.16 Kv Switchgear Panel

- 125 Volt DC Battery Room 361

The following electrical systems work in progress was observed by the

inspector

- Replacement of Agastat 7000 series relays in the B Diesel

Generator Engine Control Panel with Agastat ETR series relays. This

replacement was in response to Information Notices 77-01 and 82-04.

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- In place storage / maintenance program for the. emergency diesel

generators.

Observations made by the inspector included the following.

- The components and panels were properly identified.

- Protective dust covers were in place over the equipments / panels.

- Protective plywood covers were installed around the bases of panels

in heavy ~ construction activity areas..

- Electrical space heaters were properly energized in electrical

panels-and generators.

- Components were installed in the correct locations with the

correct orientation.

- Electrical separation was maintained.

- Electrical installation was being performed with approved

procedures.

- Where cable had been pulled to panels but not terminated, it was

wrapped with protective paper, the ends were taped and it was neatly-

coiled to an acceptable radius and secured with tyraps.

- In place storage / maintenance of the diesel generators was in

accordance with the manufacturers recommendations and approved

licensee procedures.

No violations were identified.

5.0 Electric Cable-Work Observation

The inspector reviewed activities related to safety related cables for

safety related systems to determine if they are controlled and accomplished

in accordance with NRC requirements, safety analysis report commitments

and license procedures. This included direct observations and an inde-

pendant evaluation of work performance, work in progress and

completed work.

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5.1 Storage

The following storage /maintanenance attributes of licensee construction

procedures CP-E-2 and CP-F-2 were observed by the inspector in the cable

receipt / storage / cut yard (Note: All permanent in plant cable is procured

to the same "Q" Specification requirements regardless of the application

(Q or Non-Q) except for GE furnished "non Q" PGCC cable).

- Permanent plant cable and PGCC (Q and Non Q) were stored / maintained

in separate areas of the cable yard.

- Master cable reels (as received from the manufacturer) were

identified with manufacturer's information and the Bechtel cable

code to provide cable identity and traceability.

- Sub-master cable reels were provided identity to provide

traceability to the master reel.

- Cable ends were sealed with end caps or tape.

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- Cable reels were stored above the concrete / ground to preclude cable

contact with surface water,

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- Temporary cable was stored in a remote area with a large letter I

"T" painted on the cable reels.

- Licensee procedure CP-F-2 requires that the temperatures of cable

on reels be above 10' F for removal of cable. The cable tempera-  ;

ture upon removal was not currently being recorded. The cable

yard foreman stated that when weather is cold, reels of cable are

brought inside to warm up prior to cable removal. This is an

unresolved item (50-353/87-06-01) pending licensee demonstration

of the adequacy of existing controls for cable already pulled and

the potential need for additional controls for future cable pulls.

The following cable storage / maintenance attributes were observed by the

inspector in the permanent plant pre-cut cable laydown (interim

storage) area outside the turbine building.

- Pre-cut cable lengths were each uniquely identified by attached

labels which included the application information (pull from

location to destination) and traceability back to the

master reel from which it was pulled.

- Construction procedure CP-E-2 paragraph 5.2.3.22 requires measures

to " assure that cable in interim storage pending installations is

adequately protected including maintaining the reels in an upright

position, preventing cable contact with surface water or ground."

Some of the pre-cut cable in the laydown area was found to be on

reels and stored in an upright position; however, most of the

pre-cut cable was in tied coils. The coils were stored off

the ground on wooden pallets. The inspector observed this area

daily from May 4-14, 1987. On May 13 the inspector observed a few

cable coils (approximately 20) which were not stored on pallets so

as to keep the cable off the ground and away from water submersion

damage. These cable coils were stored on a plastic sheet. The

inspector noted that the plastic sheets were dry and there was no

contact of the cables with water. The inspector pointed out to the

licensee that at a future time rainwater could pool on the plastic

and expose the cables to water. The licensee agreed and took

prompt action to place the subject cable coils off the ground on

wooden pallets. Further, since the cable storage procedure, CP-E-2

paragraph 5.2.3-22 did not specifically address coils of cable off

the cable reels the licensee agreed to issue a clarifying memo to

this procedure. The licensee's proposed corrective actions in-

clude revisions paragraph 5.2.3.22 to the procedure and providing

instructions to cable handling personnel in proper storage

practices. This is an unresolved item pending licensee development

of a procedure to control the temporary storage and protection of

coils of cable that are not on cable reels. (50-353/87-06-02)

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5.2 Electrical Cable-Installation

Recorded installation data for several class IE cable installations

was reviewed for conformance with specification 8031-E-1412 and

construction procedure CP-E-2. The calculated maximum cable pulling

tension and sidewall pressure for the installed cables was compared

to the data recorded during the installation. In all cases the

actual pull tension and sidewall pressure was determined to be less l

than the specified limits.

The inspector reviewed cable calculations E-587 for cable pull j

t package SE.01076. This was a bulk pull of six single conductor 500

s KCMIL and one single conductor 250 KCMIL cables through a five inch

PVC conduit from Safeguards Load Center Distribution Panel 20B201 to

MCC Panel 20B129.

The inspector witnessed a portion of the pull which was from

Junction box 2AJ019 elevation 313' to junction box 2AJ020 elevation

299' and then to the cable duct at elevation 269' which led to panel

20B129. The maximum allowable cable pull tension was 2245 pounds.

Calculated expected maximum pull tension was 1486 pounds. However,

as a result of the good cable and conduit prelubrication, the pull

was made with a maximum of five men pulling by hand. The pull

tension was estimated to be not in excess of 500 pounds based upon

.an average tension per man of 100 pounds per paragraph 2.1.3 of

specification E-1412.

No deficiencies were observed in either the cable pulling procedure,

records, calculations or the actual cable pull witnessed.

5.3 Electrical Conduit and Cable Tray Installation

The inspector observed installed cable tray and conduit at various

locations throughout the plant. Inspections were made of conduits

2CLO46 from Motor Control Center MCC 20B221 to MCC 20B217 and conduit

2CLO47 from Motor Control Center MCC 20B221 to MCC 20B217 and conduit

2CL047 from Motor Control Center MCC 20B217 to RHR pump 2AP210.

No deficiencies were observed in the identification, routing,

configuration, or seismic supports for these conduits. i

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5.4 Electrical Cable Terminations

The inspector observed wire and cable terminations in load centers, l

motor control centers, fuse panels, and in control cabinets at  !

several locations. An inspection was made of licensee cable termi- j

nations in Motor Control Centers MCC 20B221 and MCC 20B217 of

cable which was installed in accordance with cable schemes CB217-03A

and CB217-04A. In addition, an inspection was made of control

wire terminations made by licensee in the "B" emergency diesel

generator engine control panel. No deficier:cies were observed.

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6.0 Electrical Distribution System

6.1 Adequacy of Electrical Distribution System to Provide Required

Voltage Levels to Class IE Equipment.

The inspector reviewed the licensee's voltage profile studies and a

licensee letter to NRC dated October 22, 1981, in which low voltage

problems in certain class IE circuits were identified under Signi-

ficant Deficiency Report No. 52 for both Limerick Units #1 and #2.

In this letter the licensee confirmed a previous 50.55(e) telecon to )

the NRC in which potential undervoltage conditions for 166 safety j

related circuits were reported. Commitments were made by the i

licensee to the NRC, in this letter, to complete design changes and

installation to correct the affected circuits for Unit 2 by June 3'

1986. ll

The inspector reviewed the Bechtel " Final Report on Undervoltage

Problems in Certain Power And Control Circuits For LGS Unit #1 And

Common" dated February 1983 in which corrective actions were detailed

to correct a total of 534 deficient circuits for Unit #1 and circuits

common to Units 1 and 2. The inspector was unable to locate a record

of design changes and installation in Unit 2 to correct the under-

voltage deficient circuits. This technical item is a construction

deficiency outstanding open item (50-353/80-00-12). Failure to meet

the Unit 2 June 1986 commitment to NRC is a deviation to their

commitment. (50-353/87-06-03)

7.0 Definition of Unresolved Items

Unresolved items are matters about which more information 13 required in

order to ascertain whether they are acceptable, violations, or deviations

relative to the bulletin requirements. Unresolved items identificd ,

during this inspection are discussed in paragraphs 5 and 6 above. '

8.0 Exit Meeting

The NRC inspector conducted an exit meeting on May 14, 1987 with licensee ,

representative (denoted in paragraph 1). The NRC inspector summarized the '

inspection findings and the licensee acknowledged these comments. No l

written material was provided to licensee personnel.

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Attachment A

Documents Reviewed

1.0 Final Safety Analysis Report, Chapter 8 - Electric Power

2.0 Construction Procedures (CP)

D-1 Processing of Nonconformence Reports, Rev. 4, 6/26/86

D-7 Construction Administration Control, Rev. 8, 5/20/87

E-1 Electrical Panel Modifications, Rev. 6, 5/20/87

E-2 Permanent Plant Cable Installation and Termination, Rev. 3, 2/2/87

E-3 Electrical Raceway, Rev. 3, 10/15/86

G-3 ' Long Term Storage / Maintenance / Lubrication of Permanent

Plant Equipment and Materials Prior to Turnover, Rev. 3, 10/22/86

F-2 Receipt Inspection-Storage and Withdrawal of

Materials / Equipment, Rev. 9, 5/18/87

3.0 Drawings

E-1412 Wire and Cable Notes and Detail, Rev. 30, 2/4/87

E-1406 Conduit and Cable Tray Notes, Symbols and Details, Rev. 6, 5/6/87

E-1420 Maximum Allowable Cable Length - Power and Control Circuits, Rev.1,

12/14/83

E-66 Single Line Meter and Relay Diagram, MCC Load Tabulation,

Rev. 5, 4/26/83

E-159 Load Center SWGR-MCC FDR Bkrs. 440v, Rev. 27, 1/23/87

E-160 Safeguard Buses - 101 and 201, Safeguard Bus Feeders,

4Kv, Rev. 19, 1/3/85

E-162 Safeguard Buses - Load Center Transformer Bkrs. 4Kv,

Rev. 6, 12/14/82

E-163 Safeguard Buses - Load Center Transformer Bkrs. 4Kv,

Rev. 12, 1/7/85

E-164 Safeguard Buses - Generator Bkrs 4Kv, Rev. 19, 10/18/84

E-1 Single Line Diagram - Station, Rev. 13, 4/26/85

E-16 Single Line Meter and Relay Diagram, 4Kv Safeguard Power System,

Rev. 15, 8/1/85

E-29 Single Line Meter and Relay Diagram, 0214, D224, D234, D244,

Safeguard Load Centers, 440 volt, Rev. 10, 12/18/85

4.0 Reports

- Significant Deficiency Report No. 52 - Undervoltage Condition in Certain

Electrical Power and Control Circuits, 10/22/81

- Final Report on Undervoltage Problems in Certain Power and Control

Circuits for LGS Unit 1 and Common, 2/16/83

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5.0 Quality Records

PECO Audit Reports

2E-230 GE Cable Installation (5/8 - 5/19/86)

2E-245 Diesel Generator Control Panels (12/16 - 12/31/86)

2E-227 Motor Control Center 20B224 (3/25 - 4/2/86)

2E-248 Cable Pulling of PGCC Cables (2/13 - 2/20/87)

2E-225 Material Control (11/13 - 11/20/85)

2E-236 Electrical Cable Storage Program (7/10 - 7/31/86)

2E-180 Control of Electrical Parts and Components (11/13 - 11/20/85)

Maintenance Action Records for In Storage Maintenance of "B" Emergency

Diesel Generator

6.0 Calculations

E-587 Cable Pulling Tension, 4/27/87

E-590 Cable Pulling Tension, 5/4/87

LGS Units 1 and 2 Final Calculations Index

EE.350 Bechtel Computer Program Manual for Cable Tension Calculations.

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