ML16341G802

Summary of Public Meeting on 921119 to Discuss Licensee Reg Guide 1.97 Review Project

ML16341G802
Person / Time
Site:	Diablo Canyon
Issue date:	12/17/1992
From:	Peterson S Office of Nuclear Reactor Regulation
To:	NRC
References
RTR-REGGD-01.097, RTR-REGGD-1.097 NUDOCS 9212300333
Download: ML16341G802 (68)

Text

December 17, 1992 0 Docket Nos.

50-275 and 50-323 LICENSEE:

Pacific Gas and Electric Company (PG3E)

FACILITY:

Diablo Canyon Nuclear Power Plant, Units 1 and 2

SUMMARY

OF NOVEMBER 19, 1992 PUBLIC MEETING TO DISCUSS THE LICENSEE'S REGULATORY GUIDE 1.97 REVIEW PROJECT On November 19, 1992, the NRC staff met with the Pacific Gas and Electric Company (PG&E or the licensee) in Rockville, Maryland to discuss the issue stated above.

A list of the attendees present at the meeting is enclosed.

A copy of the licensee's presentation slides is also enclosed.

The licensee discussed the status of their review program to assess the Regulatory Guide 1.97 post-accident instrumentation at Diablo Canyon.

The licensee described the scope and focus of the review program and their continuing efforts.

The licensee plans to issue an interim report documenting their findings and any corrective actions in March 1993 and a final report in December 1993.

This meeting follows a December 18, 1991, meeting, at which the licensee discussed plans for review and closure of identified findings regarding post-accident monitoring instrumentation.

The licensee should be commended for its initiative with respect to their Regulatory Guide 1.97 review effort.

Originaf signed gy Sheri R. Peterson, Project Manager Project Directorate V

Division of Reactor Projects III/IV/V Office of Nuclear Reactor Regulation

Enclosure:

1.

List of Attendees 2.

Presentation Slides cc w/enclosures:

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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON. D.C. 20555 December 17, 1992 Docket Nos.

50-275 and 50-323 LICENSEE:

Pacific Gas and Electric Company (PGSE)

FACILITY: Diablo Canyon Nuclear Power Plant, Units 1 and 2

SUMMARY

OF NOVEMBER 19, 1992 PUBLIC MEETING TO DISCUSS THE LICENSEE'S REGULATORY GUIDE 1.97 REVIBI PROJECT On November 19, 1992, the NRC staff met with the Pacific Gas and Electric Company (PGKE or the licensee) in Rockville, Maryland to discuss the issue stated above.

A list of the attendees present at the meeting is enclosed.

A copy of the licensee's presentation slides is also enclosed.

The licensee discussed the status of their review program to assess the Regulatory Guide 1.97 post-accident instrumentation at Diablo Canyon.

The licensee described the scope and focus of the review program and their continuing efforts.

The licensee plans to issue an interim report documenting their findings and any corrective actions in March 1993 and a final report in December 1993.

This meeting follows a December 18, 1991, meeting, at which the licensee discussed plans for review and closure of identified findings regarding post-accident monitoring instrumentation.

The licensee should be commended for its initiative with respect to their Regulatory Guide 1.97 review effort.

Enclosures:

1.

List of Attendees 2.

Presentation Slides Sheri R. Peterson, Project Manager Project Directorate V

Division of Reactor Projects III/IV/V Office of Nuclear Reactor Regulation cc w/enclosures:

See next page

Pacific Gas and Electric Company Diablo Canyon CC:

NRC Resident Inspector Diablo Canyon Nuclear Power Plant c/o U.S. Nuclear Regulatory Commission P. 0.

Box 369 Avila Beach, California 93424 Dr. Richard Ferguson, Energy Chair Sierra Club California 6715 Rocky Canyon Creston, California 93432 Ms. Sandra A. Silver Mothers for Peace 660 Granite Creek Road Santa Cruz, California 95065 Ms. Jacquelyn C. Wheeler 3303 Barranca Court San Luis Obispo, California 93401 Managing Editor The County Telegram Tribune 1321 Johnson Avenue P. 0.

Box 112 San Luis Obispo, California 93406 Chairman San Luis Obispo County Board of Supervisors Room 370 County Government Center San Luis Obispo, California 93408 Mr. Truman Burns Mr. Robert Kinosian California Public Utilities Commission 505 Van Ness, Rm. 4102 San Francisco, California 94102 Mr. Hank Kocol Radiologic Health Branch State Department of Health Services Post Office Box 942732 Sacramento, California 94234 Regional Administrator, Region V

U.S. Nuclear Regulatory Commission 1450 Maria Lane, Suite 210 Walnut Creek, California 94596 Mr. Peter H. Kaufman Deputy Attorney General State of California 110 West A Street, Suite 700 San Diego, California 92101 Ms. Nancy Culver 192 Luneta Street San Luis Obispo, California 93401 Michael M. Strumwasser, Esq.

Special Assistant Attorney General State of California Department of Justice 3580 Wilshire Boulevard, Room 800 Los Angeles, California 90010 Christopher J.

Warner, Esq.

Pacific Gas 5 Electric Company Post Office Box 7442 San Francisco, California 94120 Diablo Canyon Independent Safety Committee ATTN:

Robert R. Wellington, Esq.

Legal Counsel 857 Cass Street, Suite D

Monterey, California 93940 Mr. Gregory M. Rueger Nuclear Power Generation, 814A Pacific Gas and Electric Company 77 Beale Street, Room 1451 P.O.

Box 770000 San Francisco, California 94177

~n I

ENCLOSURE 1

~TTENDEES NOVEMBER 19 1992 MEETING BETWEEN THE NRC STAFF AND PG&E TO DISCUSS GU A 0 GUID 1.97 AME Sheri Peterson Barry Marcus Angelo Marinow Jeff Skov Steven Traismen Klemme Herman Wells Fargo James Tomkins Mike Sulouff ORGAN ZATION NRR/PDV NRR/HICB NRR/HICB PG&E PG&E PG&E PG&E PG&E PG&E

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PG8 E/NRC Meeting Regulatory Guide 1.97 Review Project November 19, 1992 SLI DE1

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INTRODUCTION 8. PURPOSE

~

Objectives of This Meeting Update NRG on Status of Activities Discuss Scope and Focus of Review Program Discuss Our Plans and Continuing Efforts

n

INTRODUCTION 8 PURPOSE cont'd

~

This Meeting Follows From 12/18/91 Meeting Which:

Established Resolutions for 1988 NRC inspection Findings Discussed PGLE Identified Findings Discussed Plans to Correct Documentation or Hardware Where Needed Discussed Plans for Review and Closure

P

INTRODUCTION 8 PURPOSE - cont'd

~

Plans Included Completion of a 100%

Review of Tech Spec Variables Completion of a Sampling Review of all Variables Submittal of a Final Report

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PRESENTATION OUTLINE

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Introduction and Purpose

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Project Methodology

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Results to Date

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Exceptions

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Program Closure

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Conclusions

PROJECT METHODOLOGY

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Tech Spec Variable and Random Loop Review Process

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Areas Not in RG 1.97 Project Scope

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Acceptance Criteria

> 95%

Confidence

~

Classification and Evaluation of Findings

J

PG8 E Reg. Guide 1.97 Review Process Tech Spec.

Variables Review Random Loops

~>+

Project Team

~ Loops are Reviewed to Assure i I that 1.97 Design Criteria are Met 4

Discipline Reviews I

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'@~@mes 4agig M5

~ If Findings are I

~

~

I ident~fied, they

, are promptly

> evaluated for I operability and

'racked to closure 'oop Packages Figure 1

AREAS PREVIOUSLY REVIEWED

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Human Factors Review

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Electrical Separation Within Panels Servicing,

Testing, and Calibration Containment isolation Valves

OTHER AREAS

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Other Areas Where Detailed Review by the RG 1.97 Project May Not Be Required Parts of RG Dealing With ANSl 4.5-1980 Sub-Component Documentation SLI DEQ

ACCEPTANCE CRITERIA

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Acceptance Criteria

> 95%

Confidence 60 Random Loop Reviewed Will Provide 95%

In Addition, 100%

Review of Tech Spec Variables

{168 Loops)

In Addition, Review All Category 1

and Type A {13 Loops)

CLASSIFICATION AND EVALUATIONOF FINDINGS

~

Potential

Problems, Discrepancies, Exceptions, and Clarifications

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Evaluated for Operability, Safety Significance, and Reportability

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Findings are Closed or Resolution Path Established

RESULTS TO DATE

~ Overview of the Findings

~ Description of the Finding Areas

Summary of Findings from 1.97 Review Findings <

1 %

Findings From RG 1.97 Review Attribute Findings 49 Drawing/

Document Findings 51 %

Attributes Acceptable

)99%

RG 1.97 Attributes Reviewed

- 50,000 Component-Attrlbutes Reviewed Findings < 1 %

Attributes Acceptable

)99%

Drawing/Document Reviewed

- 45,000 Drawing Details Reviewed Figure 2

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FINDING AREAS

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Electrical Isolation

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Electrical Separation

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Environmental Qualification

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Seismic Qualification SLI OE15

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Power Isolation Example Finding o

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120 VACPY11 oTHER

'POWER SOURCE LOADS'0..

0

~

~

~

~

~

120 VACPY12 Q

POWER SOURCE.

OTHER LOADS IB Cat.

1 Devices Mutually

+Redundant Devices IB Cat.

1 Devices IA Devices IA Devices IB Cat. 2, IB Cat. 3 OIClass II Devices Isolation Finding Concern:

Possible Common Mode Failure IB Cat 2.

IB Cat. 3 OlClass I I Devices Isolation Finding

• Note: Does not affect Hagan Racks 1-16 (RPS/ESFAS Initiation Systems).

Figure 3

J

DCPP UNIT 1 - POWER SUPPLY FINDING PY11 BL PY12 CHARGING PUMPS HDR FLOW FM.017 OTHER (IBD2)

LOADS HAND CONTROL FOR SG IN A 1-4 SG AUX FEEOWATER'SUPPLY HC-SQA HC-88 OTHER (1A)

(1A)

LOADS VERTICALBOARD 1 VERTICALBOARD3 120 VACPY11 0

POWER SUPPLY 'THER LOADS POWER SUPPLY FOR CL II BORIC ACID TANK(2)

TR-413 RECIRCULATION INST. LOOP (1881)

TR-423 (1881) 0 VITALBUS F TM.12C (1882)

VERTICALBOARD 2 RCS TEMPERATURE RECORDERS TM.443 (TM-TYPICAL)SIGNAL AMP/ISOLATOR FOR (1882)

SUB COOLED MARGIN MONITORS p VITALBUS G 120 VACPY12 Q-POWER SUPPLY 'THER LOADS UO.TT2 POWER SUPPLY FOR TR-433 TR-443 RECIRCULATION INST. LOOP BORIC ACID TANK (2)

(1881)

OTHER RCS TEMPERATURE RECORDERS LOADS VERTICALBOARD 2 VERTICALBOARD 1 OTHER LOADS VERTICALBOARD 3 OTHER LOADS Typical for RCS Wide Range Temperature Loops TR-413, 423, 433 8 443.

Figure 4

ELECTRIC ISOLATION FINDING RESOLUTION

~

Initial Reviews Show Original Criteria Met

~

Voluntary LER Planned

~

Review Unit 1

and 2

120 VAC 1E Circuit Breakers Feeding Any 1A, IB1 and IB2 Load for Both Units (134

Total, 70%

of Total Breakers With Loads)

(Breakers Designated

Spares, Those With Only Class ll or Category 3 Loads Not Reviewed)

~

Confirm Higher Class instrumentation Will Not Be Affected by Common Mode Failures Postulated in Lower Class Devices and Complete Configuration Management Program Expansion

SIGNAL ISOLATION

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Lack of Documented Test or Analysis of Capability of Signal Isolation Device to Perform Function

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Examples:

Switches or Electronic Signal Isolation Device

~

Resolved by Documentation of Tests, Preparation of Calculation or FMEA

Separation Example Finding Other Class II Circuits Typical for A.

RCS Temperature T-Cold TR-423, TR-433 Common Cable Raceway Used for Wiring Connected to Redundant Indicators Other Class ii Circuits.~.

Circuits are l8C Class IBB1 Isolation I

4 Instrument A Monitor Instrument B Monitor Control Room Figure 5

Environmental Qualification Findings Finding Documentation of EQ Not Established in Existing EQ Files, for the following types of equipment:

(Typical Examples}

o Cable o Terminal Blocks (Outside Containment)

Immediate Action:

Where required, prompt operability assessments were completed to document continued operability of installed equipment.........

,--<<Finding Resolution I

Revise or Create EQ Files as required to document installed configuration.

I I

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I I

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I I

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I haeeer~.-

Figure 6

Environmental Qualification Findings Finding Documentation of EQ Not Established in Existing EQ Files, for the following equipment:

(Typical Examples) o Diodes o Solenoid Valves Immediate Action:

Prompt operability assessments were completed to document continued operability of installed equipment.........

r-l Finding Resolution Prepare a Failures Modes and Effects Analysis to justify system operability after the subject device becomes inoperable due to environmental DBE exposure.

I I

IT Figure 7 FMEA

Finding Seismic Qualification Findings

-+ Finding Resolution Documentation of SQ Not Established in Existing SQ Files, for the following types of equipment'.

(Typical Examples) o Relay Cabinet o Position Switches o Junction Box Immediate Action:

Where required, prompt operability assessments were completed to document continued operability of installed equipment.........

Revise or Create SQ Files as required to document installed configuration.

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Figure 8

EXCEPTIONS

~

Instances Where Design Deviates From RG 1.97

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Sufficient Technical Justification to Conclude Design is Acceptable As-Is

~

Categorized As:

Previously Accepted No Apparent Issue New Exceptions

EXCEPTIONS -- NO APPARENT ISSUE

~

RG 1.76 (Invoked by RG 1.97}

Previously Discussed with NRC (12/18/91}

DCPP Design Preceded this RG DCPP Design Basis for Independence is Licensed and Acceptable RG 1.76 is Used for New Design Where Feasible

~

Accum. Isol. Valve Position indication (Cat.

8 vs.

Cat.

2)

Previously Discussed (12/18/91)

No Required Post-Accident Safety Function

4 4

EXCEPTIONS -- NO APPARENT ISSUE cont d

~

Pressurizer Level Recorder

{Common Class II Recorder)

Recorded in ERFDS and the Plant Computer Consistent with Discussion at 12/18/91 Meeting

< ~

l

NEW EXCEPTIONS

~

Meteorology Variables (Display via Glass II Computer)

RG 1.97 Requires Category 3

Indication is via the Plant Computer (Class II)

Plant Computer Meets Intent of Category 8

Reclassification to Category 3 Not Required

~

Containment Pressure Recording (Class II

< 0 psig)

Wide Range, 0 to 200 psig, Gategory 1

Normal Range,

-5 to 55 psig, Category 1

Except Recording Seventh

Channel, Glass II Recorder,

-5 to +5 psig Issue:

Class II Recording for -5 to 0 psig This is Not Range of Interest After an Accident

rb 0

PROGRAM CLOSURE

~

Issue Interim Report

~

Complete Project Scope Tech Spec, Random Loop, and Category 1tType A Reviews Breaker Reviews Closure of Other Identified Items Open Items from Design Criteria Memorandum Development Efforts Outstanding Actions from Initial Non-Conformance Report Investigations Recommendations from Independent Review

~

Generic Positions

~

Configuration Management Expansion

~

Issue Final Report

EL

GENERIC POSITIONS

~

ANSI/ANS Standard 4.6-1980 RG 1.97 Invokes Standard in Certain Areas (e.g.,

EQ)

Define Generic Position

~

Sub-Component Documentation Electrical Sub-Components (e.g.,

Resistors, Switches)

Lack Complete Documentation Design Change and Part Dedication Processes Now Assure Adequate Documentation Define Generic Position

gh

CONFIGURATION MANAGEMENT

~

Acceptability of Some Installed Designs Confirmed by Engineering Evaluation

~

Evaluation Takes Credit for Class I "Characteristics' Issue:

How to "Maintain This Characteristic During Future:

Procurement Maintenance Design Modifications

~

Resolution:

Expand Configuration Management Program

CONCLUSIONS

~

~

k II

~

RG 1.97 Review Program Validates the DCPP RG 1.97 Design Basis

~

"Finding Rate" Has Been Low

~

Findings Have Been of Low Safety Significance

~

No Threat to the Health and Safety of the Public

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