ML13309A203

Rev 6 to 1992 Design Bases Documentation (DBD) Program Plan - DBD & Reconstitution Program

ML13309A203
Person / Time
Site:	San Onofre
Issue date:	02/29/1992
From:	Curran J, Schone D SOUTHERN CALIFORNIA EDISON CO.
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ML13309A202	List: ML13309A201 ML13309A203
References
PROC-920229, NUDOCS 9204020057
Download: ML13309A203 (33)

Text

DBD-1 1992 DBD PROGRAM PLAN Design Bases Documentation (DBD) and Reconstitution Program San Onofre Nuclear Generating Station (SONGS)

Units 1, 2, and 3 Prepared by:

0. B. SCHONE Approved by:

J. M. CURRAN Revision 6 February 1992 Southern California Edison 9204020057 920326 PDR ADOCK 05000206 P

PDR

SCE'S DESIGN BASES DOCUMENTATION & RECONSTITUTION -

PROGRAM PLAN TABLE OF CONTENTS SECTION DESCRIPTION PAGE I.

INTRODUCTION................

1 II.

OBJECTIVES........................

2 III.

SUB-OBJECTIVES....

3 IV.

SCOPE 4

V.

VALIDATION 5

VI.

OPEN ITEMS............................

6 VII.

IMPLEMENTATION PROCEDURES AND REVIEWS 7

Graphical 1992.DBD Production Schedule......

11 VIII.

DBD FORMAT.

12 IX.

DBD REFERENCE DATA RETRIEVAL.............

.....15 X.

DBD ORIENTATION TO SCE NUCLEAR MANAGEMENT AND TECH STAFFS 17 XI.

ASSESSMENTS.......

18 APPENDIX A - DBD Preparation Schedule Process APPENDIX B - DBD Program Plan Related Definitions APPENDIX C - DBD Program Guideline Listing of Reference Sources

SCE'S DESIGN BASES DOCUMENTATION & RECONSTITUTION - PROGRAM PLAN The major plan changes in Revision 6 are:

o A 10CFR50 Appendix R/Sofe Shutdown Topical 080 and an In-Service Testing (IST) Topical DBD for Units 2 and 3 have been added to the DB0 Program Scope. Refer to Appendix A of the enclosure for schedule detail.

o As a result of the decision to retire San Onofre Unit 1 (501), no other SO1-DBDs are planned. However, 7 SO1-DBDs were issued in 1990/91 on important system and topical areas. Refer to Appendix A of the enclosure.

o Two new sections were added to the DBD Plan,Section X "DBD Orientation" and Section XI "Assessments."

INTRODUCTION The purpose of Southern California Edison's San Onofre Design Bases Documentation and Reconstitution Plan is to outline a program to retrieve, reconstruct, confirm, and document San Onofre Nuclear Generating Station's nuclear power plant design bases in a series of Design Bases Documents.

The intent of the program is to establish and document the rationale or "whys" for the design bases.

There has been a growing concern over the past few years within the nuclear industry regarding design basis issues. NRC activity in this area has included a variety of inspections and surveys, (NUREG-1397). An issue that has been identified as a result of these activities is a potential lack of retrievability and accessibility of design documents.

The NRC has determined that there have been instances where "modifications have been made without sufficient engineering basis and have compromised safety system functionality."

Per the NRC, "missing or unretrievable design documentation appears to be a root cause of these problems."*

Also, NUMARC 90-12, Design Basis Program Guidelines note that many design documents for a plant may be stored without an easy means of retrieval, and NUMARC urges that utilities consider indexing such documents.

Without modifications, plant improvements, or repairs, the only documents that would be required to operate a nuclear power plant would be the operational and maintenance manuals and procedures together with the Hazards Analysis or Safety Analysis Reports.

However, equipment degrades, plants experience transients, and modifications and improvements are implemented to increase efficiency and sustain long term operation. In large complex and interactive designs such as commercial nuclear facilities, a minor alteration could result in the degradation of system performance in the long or short term which may reduce the margins of safety beyond the approved design envelope.

Quotations taken from a slide presented by Brian K. Grimes, Director, Division of Reactor Inspection and Safeguards, presented at the NRC Regulatory Information Conference, Washington D. C., May 1-2, 1990.

-2 A systematic Design Bases Documentation (DBD) development process establishes meaningful plant design bases and ensures prompt access to associated documents. Access to DB0s facilitate future efficiency and quality of plant changes and associated safety evaluations. The DBD Program will improve the SCE technical staff's design bases understanding.

The program will document the original bases of the design for consistency comparison with existing design details and as-built, as-operated, as maintained information. Such data will be accessible to SCE's operating, maintenance, oversight groups and engineering staffs.

The SCE DBD Program documents detail design bases information that reflects plant design at the time of the operating license issuance with subsequent design basis modifications incorporated. Development of the DBDs will result in a significant data base of essential design basis information being established and verified.

The SCE DBD Program Plan is a living document throughout the DBD preparation program. Lessons learned are incorporated. Industry DBD efforts are reviewed for applicability to SONGS. SCE's DBD Program conforms to or exceeds development guidelines contained in:

o The SCE Independent Assessment of the Engineering and Technical Support to San Onofre Nuclear Generating Station, Three (3) Volume Report dated August 1988.

o The INPO Design Requirements Documentation Guidelines, June 13, 1988, draft. Per INPO, the draft effort was transmitted to NUMARC as input for consideration into the final 1990 NUMARC DBD Program Guidelines.

o Region V Utilities - Guidelines for the Establishment of Design Bases Documentation Programs, dated May 19, 1989.

Reference:

John B.

Martin, Regional Administrator Region V NRC, presentation at the April 18-20, 1989 NRC Regulatory Information Conference, Washington D.C.

o NUMARC Design Basis Issues (DBI) - Design Basis Program Guidelines, NUMARC 90-12 dated October, 1990.

o NUREG-1397 - An Assessment of Design Control Practices and Design Reconstitution Programs in the Nuclear Power Industry, dated February 1991.

Refer to Section XI herein, Self-Assessment to NUREG-1397.

I. OBJECTIVES The DB~s are intended to be used to support a variety of engineering, licensing, and plant activities such as operations, maintenance, and site technical.

Without a clear sense of the objectives that the DBDs are developed to achieve, the program could produce documents of minimal value to the intended users. Thus, it is imperative that objectives be identified as an initial step in the program. As DBDs are developed, they are evaluated against the following program objectives:

-3 A) Consolidate basic design bases information into a single source document, system or topical DBDs, which communicate basic design bases, including reference to sources; B) Preserve corporate memory and understanding of the underlying technical rationale for the original plant design and subsequent design changes. Minimize the effect of normal attrition of key individuals within SCE, the NSSS Supplier, and other key contractor personnel; C) Enhance the quality of design changes through improved accuracy, accessibility, definition, and understanding of the design basis; D) Provide controlled design bases information to organizations who must follow design requirements in fulfilling their responsibilities; E) Provide condensed technical information used to improve the quality of safety evaluations of plant changes and improve the process and thoroughness of 10CFR50.59 evaluations; F) Provide a documented reference to support operability evaluations and the development of justifications for continued operation (JCOs); and G) Provide a documented reference to support the review of Technical Specifications changes.

The above listed objectives are certainly not all inclusive. They are targeted at the engineering and licensing areas as the primary beneficiaries of DBDs.

There are many other plant activities that should benefit from a design bases program. For example, documentation management aspects are improved as a result of the preparation and related configuration control of the plant systems and topical DBDs.

II.

SUB-OBJECTIVES, Data Management It is necessary to maintain DBD data in a form that is usable, current and accurate. Objectives in this area are to:

o Document and address design database omissions; o Provide procedures that ensure information pertinent to the design bases, such as correspondence and procedure changes is properly reviewed.. Assure that appropriate information is incorporated, and that the documentation is current. Refer to Section V, herein

- Open Items, for the DBD program process for identifying and correcting data control deficiencies; o

Provide a cross-index to lower tier design database documents, including an index of applicable calculations to enhance retrievability by key users; and 0

Improve the effectiveness and efficiency of the plant design change process through use of an organized database that reduces and streamlines design document searches.

-4 III.

SCOPE The scope of this program is provided in the schedule of plant systems and topical areas listed in Appendix A. The schedule includes systems with safety-related functions, systems considered important to plant'safety, and select non-safety related systems.

Systems covered in the Technical Specifications have been included.

The DBDs are structured on a "mixed approach", which includes descriptive

Lext, plus a

p propriate document referencing.

The mixed approach Includes texts of:

o design bases o

supporting design information o

component descriptions With references to:

o calculations 0

specifications o

regulations o

codes and standards o other documents Typical source and reference documents, having relationship to DBDs and Configuration Management, are depicted graphically to aid in DBD preparation, as follows:

Terminology Relationships O&M Procedures Confg irtionInstructions ManagementOte I

Physical Plant Other Controlled Documents.

DesignM Desi-gn Bases Control.

esign Bases Calculations

_Specs Reg qRe-ga-

-Analysis-Drawings Eth er De a nR Rega

-TalUatmnS

- L 7ita Design Design.

Design Design Documents Input Process Output NUMARC 90-12. Fia 1

-5 In general, the contents of self-contained documents are not duplicated in the DBD. Rather these documents are incorporated by reference, when applicable. Examples of self-contained documents include:

o ASME Code Stress Reports o

Equipment Qualification Data Packages o

Vendor Manuals o

Operations and Maintenance Procedures o

Industry Codes and Standards 0

S3pecIfI Cat IonsZ~

o Design Changes, Calculations o

Design Detail Drawings IV.

VALIDATION Select DBDs are validated through a process intended to provide reasonable assurance that the DBD is complete, accurate and consistent with the existing as-designed, as-licensed, as-built, as-operated, as-maintained configuration of the plant.

The objectives of the validation process are:

1. to provide reasonable assurance that the information included in the DBD is consistent with the plant's design and configuration,

2. to identify programmatic deficiencies or systematic errors occurring in the preparation of DBDs and recommend corrective action, and

3. to apply lessons learned applications.

Specifically, the DBD Program attempts to:

o Clarify key design bases parameters for the systems and major components.

The program will do this for Units 2 & 3 plant systems listed in Appendix A, and major component operating mode.

o Provide special attention for vendor supplied subsystems (i.e.,

skid mounted equipment).

o Verify key engineering parameters used to determine system and component operability are incorporated into operations and maintenance procedures (maintenance procedures principally means those involved with surveillance).

o Verify that operational and maintenance parameters used to demonstrate system and component operability have been properly derived from the design bases.

o Verify the post-installation testing program for system and/or components meet these parameters, following design modification activities.

The scope of the validation process may vary from a selective educated sample to a more comprehensive validation of the information, as warranted. The scope will be prescribed by several factors including importance to safety of the system components, history of past problems, complexity, size, etc.

-6 The DBD Program validation technique elements are:

1. Walkdowns performed by the DBD Engineer (DBD preparer) during the preparation of the document,

2. Supervisory review of the document throughout the DBD preparation stages, in addition to the documented evaluation by an Independent Review Engineer (IRE), and

3. An interdisciplinary review performed by cognizant technical personnel from Nuclear Engineering, Nuclear Licensing, Station Technical and other sections of the Nuclear Organization, independent of the DBD Section. A vertical assessment (SSFI type. inspection/audit) of select areas by an independent group specially dedicated to this task may be used as a supplement to the validation process.

The selection of the appropriate method, dependent on the DBD System, is made by DBD Management on a case by case basis.

The vertical assessments consist

.of a review, on an educated sampling basis, of the adequacy, completeness, and consistency of the material presented in the DBD package. Procedures are developed to provide guidance to the personnel participating in validation activities.

V. OPEN ITEMS A process is in place to effectively manage and track the resolution of open items, inconsistencies, or discrepancies identified during the implementation of the DBD program. The fundamental purposes of the Open Item Report (OIR) Process are:

1.

To act as a mechanism for establishing the correctness of the design bases of a system where questions, concerns, lack of information, or errors exist.

2.

To provide a thorough, comprehensive process that will adequately assess the impact of open items on the continued safe operation of the plant.

Examples of the types of open items which have arisen or can be expected are:

o Operability Issue o

Reportability Issue o

Noncomforming Issue o

Licensing Issue o

Design Bases Issue o

Missing Information o

Document Discrepancy 0

Tracking (follow-up administrative OIRs)

-7 A controlled listing of open items is prepared during the process of drafting the DBDs.

Following the identification of an open item, a screening review is performed to quickly determine its potential safety significance. If the identified open item does not involve a safety concern, the Open Item Report (0IR) will continue to be evaluated and dispositioned and will be subject to supplemental review during the final evaluation. If the identified open item is determined to be potentially safety significant, then the Non-Conformance Report (NCR) process is initiated. At OIR initiation, an operability and reportability assessment is performed and documented within the OIR.

In accordance with the SCE Topical Quality Assurance Manual (TQAM),

safety significant discrepancies items are reviewed for inclusion in SCE's NCR Program. Thus, DBD open items that meet the test of a non-conformance are:

o Assessed for reportability as required by 10CFR50; o

Assessed for impact on operability; and o

Cause and corrective action appropriately documented, etc.

All other open items will be separately tracked through resolution, via issuance of DBD OIRs.

All NCRs and OIRs that affect the DBD content or conclusions are listed in each DBD at issuance.

The OIR procedure (NES&L Quality Procedure 25-5-1) includes an Open Item priority system. The OIRs and the DBDs are linked together on a priority basis to ensure that the disposition and resolution of the OIR is incorporated into the DBDs.

SCE, as part of the NUMARC Design Basis Issues (DBI) Working Group, reviewed the NUMARC Design Basis Program Guidelines with special attention to Open Items to ensure that SCE's program is consistent with or exceeds the generic guidelines.

VI.

IMPLEMENTATION PROCEDURES AND REVIEWS A. Program Procedures The Procedures governing the DBD Program activities are developed in compliance with the SCE Quality Assurance Program. The DBD Program is addressed in the Topical QA Manual in Chapter 2-A Design Development, Review and Approval under TQAM Sections 1.0 and 3.0.

The DBD Program includes development of a system of procedures and guides to control the production of the DBD packages, namely:

Procedures for the preparation of DBDs Procedures for the administration of DBDs Desktop Guides

Procedures for the Preparation of DBDs:

All DBD Nuclear Engineering Safety and Licensing (NES&L) Quality Procedures are available, except as noted (*).

25-1-1 Guidelines for System DBD Preparation 25-1-2 Calculation Review Methodology 25-1-3.

Setpoint Review Methodology 25-1-4 Margin/Uncertainty Assessment (* In preparation, a desktop procedure was issued to DBD Engineers in April, 1991.)

25-1-5 System Functional and Boundary Definition Methodology 25-1-6 Plant Operating Instructions Review Methodology 25-1-7 Motor Operated Valve Review Methodology 25-1-8 Technical Specification Review Methodology 25-1-9 Licensing Basis and Commitments Review Methodology 25-1-10 Electrical Interlock Functional Testing and Review Methodology 25-1-12 Verifying the Environmental Qualification Master List 25-1-13 Inservice Testing Review Methodology 25-1-14 Post Modification Testing Review Methodology 25-1-15 Spurious Circuit Actuation Evaluation 25-2-1 Guidelines for Topical DBD Preparation Procedures for the Control of DBDs:

25-5-1 Design Bases Documentation Open Item Report 25-5-2 Design Bases Documentation (DBD) Responsibility Turnover. (* In preparation, a desktop procedure is available, with a target issuance of NES&L 25-5-2 in the 2nd Quarter 1992.)

25-5-5 Validation, Approval, and Issue of Design Bases Documents 24-10-17 This NEDO Quality Procedure that controls other San Onofre design disclosure documents was modified in May 1991 to address the "Revision, Maintenance, and Control of DBDs."

-9 Desktop Guides:

All are available, except as noted (*)

DBD-1 DBD Program Plan (This Document)

DBD-1A DBD Commitments List DBD-3 Style Guide for DBD Writers and Text Processors DBD-5 Standard For DBD Simplified Drawings/Diagrams DBD-9 Ultimate Heat Sink Operability Review Methodology (DBD Guidance related to NRC Generic Letter 89-13, Service Water Systems Licensing Bases Review)

DBD-11 DBD Glossary (* in preparation, a desktop procedure is available.)

Topical 17 Topical DBD Scoping Documents, refer to Appendix A Scopes for the list of Topical DBDs.

General Miscellaneous desk top guides, such as:

o Check list of sources of design bases reference materials and corresponding electronic data retrieval systems.

o Designated DBD Reference Codes for DBD activity for nuclear document files (SONGS-CDM).

o Guidance to DBD Engineers on Procedure Reviews

-10 B.

DBD Reviews, Milestones o

At the 10%,

50%,

and 90. DBD development milestones, DBD Management Staff reviews are held.

MILESTONE(%)

DBD REVISION DEFINITION NA NA o Initial reference data retrieved and System Design Engineer (SDE) on-board 10 %

NA o System/Topical functions defined o System/Topical interfaces established o System/Topical boundaries (DBD Scope) established o Note: Confirmation of resource and documentation adequacy is first reviewed at the 10% Milestone and monitored throughout DBD preparation.

50 %

NA o Draft DBD completed o Open items identified o Supervisory review complete o Plan Validation 90 %

A o

Validation Implementation o Interdisciplinary review o Final supervisory review of comments 100 %

0 o All comments resolved and incorporated o DBD complete, CDM issues DBD, and start of "turnover" of DBD ownership to Nuclear Engineering

)0 Design Organization (NEDO).

C. Graphical Schedule See next page for 1992 Target DBD Implementation

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a*, 0 VIII. DBD FORMAT Although the DBD Program Procedures provide the specific guidelines for the preparation of the DBDs, the program format elements are addressed below to provide general information on the level of detail and content of the DBDs.

TABLE OF CONTENTS A. SYSTEM DBD PACKAGE CONTENT FORMAT The format guidelines, per NES&L 25-1-1, for the DBD Packages are as follows:

PREFACE PURPOSE

0.

SUMMARY

OF DESIGN BASES INFORMATION

1. SYSTEM OVERVIEW 1.1 System Boundaries 1.2 System Interfaces 1.2.1 Services Supplied 1.2.2 Support Services Required 1.3 Quality Classification and Seismic Classification 1.4 System Programmatic Issues

2. FUNCTIONAL DESCRIPTION 2.1 Safety Function 2.2 Important-to-Plant Safety Functions 2.3 Non-Safety Functions 2.4 Regulatory Guide 1.97 Functions

3. SYSTEM OPERABILITY REQUIREMENTS

4. COMPONENT PARAMETERS FOR SYSTEM FUNCTIONALITY

5. APPLICABLE CODES, STANDARDS, AND REGULATORY DOCUMENTS 5.1 General Design Criteria 5.2 Regulatory Documents 5.2.1 As Licensed 5.2.2 Since-Licensed

-13 5.3 Codes and Standards 5.3.1 Codes of Record 5.3.2 Additional Codes and Standards

6. PROGRAMMATIC ISSUES And ADDITIONAL DESIGN BASES REQUIREMENTS 6.1 Programmatic Issues 6.1.1 Accident Analysis 6.1.2 Single Failure/Common Mode Failure 6.1.3 Internal and External Hazards 6.1.4 Fire Protection/Safe Shutdown 6.1.5 Electrical Separation 6.1.6 Environmental Qualification 6.1.7 Seismic Qualification 6.1.8 Human Factors 6.2 Additional Design Bases Considerations 6.2.1 Testing and Inspection Requirements 6.2.2 Leak Detection 6.2.3 Interlocks 6.2.4 Emergency Power Supply 6.2.5 Overpressure Protection 6.2.6 Operator Actions

7.0 REFERENCES

7.1 Cited References 7.2 Other System References 8.0 APPENDICES (Additional Appendices are added as required)

APPENDIX A, Open Item Reports APPENDIX B, Technical Data APPENDIX C, Tables APPENDIX D, Figures APPENDIX E, Licensing Bases/Commitments APPENDIX F, Significant Design Modifications APPENDIX G, Summary of Design Bases Calculations

-14 B.

TOPICAL DBD GENERIC OUTLINES The following generic outline applies to Equipment, Event, and/or Activity Topical DBDs.

Since each Topical DBD is unique, the following generic outline guidance is provided for consistency between Topical DBDs to assist users, where possible:

PREFACE 0.0 PURPOSE 1.0 TOPIC DESCRIPTION 1.1 Definition of Topic 1.2 System Applicability 1.3 Background (Event Topicals) 2.0 APPLICABLE CODES, STANDARDS, AND REGULATORY REQUIREMENTS 2.1 General Design Criteria 2.2 Codes and Standards 2.3 Regulatory Documents 3.0 TOPICAL DESIGN BASES 3.1 Historical Bases 3.2 Current Bases 4.0 TOPICAL REQUIREMENTS (The applicable sections are selected)

Equipment Related 4.1 General Considerations 4.2 Functions 4.2.1 Safety Functions 4.2.2 Important-to-plant Safety Function 4.3 Parameters 4.4 Limitations

-15 Event Related 4.1 Functions 4.1.1 Safety Functions 4.1.2 Important-to-plant Safety Function 4.1.3 Non-Safety Functions 4.2 Method of Analysis 4.3 Results Summary 4.4 Conclusions Activity Related:

4.1 Functions 4.1.1 Safety Functions 4.1.2 Important-to-plant Safety Function 4.1.3 Non-Safety Functions 4.2 Safety Analysis 4.3 Limitations 5.0 Design Bases Modification History

6.0 REFERENCES

Appendices Appendix A Open Item Reports Appendix B Tables Appendix C Figures IX. DBD REFERENCE DATA RETRIEVAL A. Reference Sources:

In addition to record retrieval from SCE's Corporate Document Management (CDM) system, it is necessary to retrieve select data records from three primary sources, namely:

o Combustion Engineering (C-E), SONGS Unit 2/3 Nuclear Steam Supply System (NSSS) Vendor, o

Bechtel Power Corporation (BPC), SONGS 1, 2 and 3 Architect Engineer (AE) 0 Westinghouse SONGS Unit 1, DBD data retrieval ceased in 1991.

-16 The C-E data retrieval effort was part of a joint effort of the C-E Owners Group (CEOG) Configuration Management Task Force (CMTF).

The C-E CMTF systematic approach effort was completed in 1990. The product includes a value added index of over 23,000 documents with over 17,000 San Onofre related documents containing an estimated 350,000 pages of calculations, analyses, studies, evaluations, and correspondence.

The product options included optical disk transfer of the index and image of the 350,000 pages. SCE elected to select the optical disk option for ultimate integration into existing SCE Network compiter applications beyond the near term DBD preparation effort. The C-E FileNet optical image system became an integral part of the DBD Library beginning in mid 1990. In addition, the C-E database index has been combined with four other related SCE databases for over 80,000 document indices available on the mainframe-host called Nuclear Document Reference System, NDRS. To increase data research efficiency, a single search inquiry of NDRS, by any Nuclear Group user, results in retrieval of pertinent indices data from multiple data bases. DBD Configuration Management Staff provides NDRS User-Guides and assistance to new users as part of DBD Orientation. Refer to the next Section for other aspects of DBD Orientation.

B. Computer Assistance and Control Aspects Most utilities use their existing design change control process to control changes to DBD information. As the design authority, the design engineering organization has the primary responsibility to ensure changes are properly reviewed, verified, and approved.

Similarly, changes to DBDs often affect many documents and analyses. To assist in identifying affected documents and analyses, matrices that cross-reference documents is under on going development. These matrices are often computer-based because of the number and complexity of interactions involved.

The extent of SCE's first phase DBD computerization was finalized prior to beginning the 1990 production DBDs, namely:

The Rev-0 DBDs are entered into two (2) connected computerized SCE Network applications, namely:

o Text-Search of SONGS Documents (TextWare) contained in the IOC Network Library of the Nuclear Retrieval Data System and at the Site. TextWare allows section index searches, key-word and phrase searches and text viewing. Text-Search normally contains text only. Note:

The DBD Program Plan and DBDs text

• are available in TextWare in addition to SONGS CDM File.

o San Onofre Document Management System (SDMS).

SDMS is an optical image of the entire document including signature approvals and all tables and figures.

Optical image systems do not presently contain word search features.

All issued DBDs and DBD NES&L Quality Procedures are available on SDMS in addition to Textware.

-17 The combination of Text-Search and SDMS affords flexibility in the access of DBD packages. Text-Search and SDMS are linked between Nuclear Engineering, Safety, and Licensing (NES&L) in Irvine and the SONGS Site.

DBD revisions are controlled via a single input to SDMS that automatically updates the Text-Search application. Hard copy of the DBD packages are also issued to select controlled locations at the IOC and Site.

The original DBD packages are filed in Technical Services-Drawing Control at the Irvine Office and indexed in Corporate Documentation Management (CDM)-SCE Document Configuration System (SDCS) as a design disclosure, revision controlled document.

Additional computerization under review, on an initial development basis, for the DBD effort includes:

o Optical imaging and computer assisted user-friendly menus for a DBD document review/retrieval work station(s).

o "Value-added" indexing and integration of existing computer databases for retrieval of select engineering and licensing documentation, applicable for expansion to optical imaging.

o Computerization of engineering and licensing documents on a hierarchy reference basis.

X DBD Orientation to Nuclear Management and Technical Staff A.

The DBD Program scope includes individual orientation sessions with Nuclear Organization Managers and Supervision.

The DBD Orientations are tailored to the match the particular manager responsibility and interest.

For example, plant operating aspects of the DBD products was the primary focus during the meeting with Operations Management. DBD spin-off benefits related to Operations were addressed, such as DBD preparation procedures:

NES&L 25-1-06:

Plant Operating Instruction Review Methodology NES&L 25-1-07:

Motor Operated Valve Review Methodology NES&L 25-1-08:

Technical Specification Review Methodology NES&L 25-1-10:

Electrical Interlock Functional Testing Review Methodology NES&L 25-1-14:

Post-Modification Testing and Review Methodology NES&L 25-1-15: Spurious Circuit Actuation Evaluation Fifteen (15) structured DBD Orientation sessions were held in the last six (6) months and are continuing.

B.

DBD-For-Users, 6 hour6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> training to Lesson Plan D30001, was conducted five (5) times since October 1991.

The sessions were attended by both NES&L and NGS technical staff, with average class sizes of over 15 individuals per session.

The DBD Orientations to the Nuclear Organization managers, supervision, and technical staff are in addition to the DBD procedural requirement and policy to involve key Nuclear Organization designated representatives in the 10%, 50%, and 90% DBD Milestone input and working meetings.

0

-18 XI ASSESSMENTS:

0 Internal and external assessments of the DBD Program and DBD Production implementation process periodically occurs.

The SCE Design Bases Documentation Program Plan is routinely updated. As DBD activities progress, pertinent information, direction and insights from lessons learned will be incorporated into the Program Plan updates.

The Initial DBD Program Plan was sent to the NRC Region V on January 9, 1989 and Revision 5 was sent on March 11, 1991. The NRC Region V Resident Inspectors' Office has received all previous Program Plan Revisions.

SCE Nuclear Oversight has performed DBD assessments in January 1991 and February 1992.

INPO reviewed the DBD Program during their April 1991 visit.A similar review meeting was held with NRC Region V Reactor Safety Branch Chief in September of 1991.

The October 1991 NRC Systemic Assessment of Licensee Performance (SALP)

Report acknowledged the DBD analysis activities. Specifically, in Sec-F, Engineering/Technical Support, 1. Analysis:...."the licensee appeared to have successfully implemented past recommendations by continuing to aggressively pursue engineering program enhancements, such as the design basis update and technical sufficiency improvements."

Routine self assessments are a part of the DBD Program and recently included a comparison to NUREG-1397, "An Assessment of Design Control Practices and Design Reconstitution Programs in the Nuclear Industry,"

dated February 1991. The 40 page self assessment document compares 50 pertinent paragraph sections from NUREG 1397 regarding key attributes of effective Design Bases/Reconstitution Programs. The SCE assessment includes over 120 comparison discussion items.

The results of the assessment comparison to NUREG 1397 is deemed to be favorable. The NUREG 1397 comparison format and SCE results were presented at a subject meeting at Northeast Utilities Offices on October 11, 1991.

The meeting was attended by 8 of the 10 Utilities with CE-NSSS Plants. The NUREG-1397 self assessment document has been made part of the DBD Orientation interface activities and is available upon request.

In conjunction with SCE's self-assessment against guidance contained in NUREG-1397, a review was conducted on the background discussion and conclusions of SECY-91-364, "Design Document Reconstitution", dated November 12, 1991.

For supporting information to the 1992 DBD Program Plan and Progress Status, refer to the attached Appendices:

Appendix A - DBD Preparation Schedule Appendix B - DBD Program Related Definitions Appendix C - DBD Program Guideline Listing of Reference Sources (Refer to last page for Closing/DBD Mission Statement)

'APPENDIX A DBD PREPARATION SCHEDULE PROCESS A. DBD Preparation Schedule Criteria The following-criteria were used in preparing the attached schedule:

1.

The plant systems were ranked separately for Unit 1 and Units 2 and 3.

2.

Ranking was performed based on:

o Importance to plant safety o

Historical design issues consideration o

Operations and maintenance design bases issues consideration

3.

The schedule covers the period 1990-1995 with approximately ten plant systems and topical areas completed every year.

4.

Systems ranked as low priority are not included in the schedule.

Sub-Objectives:

o Where practical, issue the production DBDs to match the needs of San Onofre; 0

Target DBD completion prior to planned design change activities for particular systems; and o

Schedule Design Engineering/Station DBD support compatible with unit outages and specific needs.

B. Summary:

Unit 1 Units 2 & 3 Units 1/2/3 Plant Systems DBDs Scheduled 6

+

32

=

38 Topicals DBDs Scheduled 1

+

15

=

16 TOTAL SCHEDULED 7

+

47

=

54 As a result of the decision to retire San Onofre Unit 1, no other SO1-DBDs are planned.

However, 7 SO1-DBDs were issued in 1990/91 on important system and topical areas.

-A2 C. DBD Completion Status and Schedule Plan Six (6) Unit 1 DBDs issued in 1990, with one (1) U-1 DBD issued in 1991.

Note: Three (3) additional working DBDs were put on hold due to the Unit 1 "retirement" decision.

DESIGN BASES DOCUMENTATION PREPARATION SCHEDULE FOR THE YEAR 1990 START REV. 0 DBD ID DBD TITLE REMARKS Date DBD # = System System Title, or Descriptions #

Topical Area Feb Dec 1990 DBD-SO1-590 Safeguard Load Issued 1989 Sequencing System (SLSS)

Apr Dec 1990 DBD-SO1-TR-EQ Environmental Issued, Feb 89 Qualification EQ 1991, Rev-1.

Topical Jan Dec 1990 DBD-SO1-410 Instrument Air & Issued 90

/420 Backup Nitrogen Systems Feb Dec 1990 DBD-SO1-380 Nuclear Issued 90 Instrumentation System (NIS)

Feb Dec 1990 DBD-SO1-340 Saltwater Issued 90 Cooling System Mar Dec 1990 DBD-SO1-330 Component Issued, Jun 90 Cooling Water 1991, Rev-1.

System Apr April 91 DBD-SO1-120 4KV, 480V & 12KV Issued 90

/130 Electrical Systems

-A3 Nine (9) Units 2 and 3 DBDs were issued in 1991 DESIGN BASES DOCUMENTATION PREPARATION SCHEDULE FOR THE YEAR 1991 START REV. 0 DBD ID DBD TITLE REMARKS Date DBD # = System System Title, or Descriptions #

Topical Area Feb Dec 1991 DBD-S023-TR-HF Human Factors Rev-0 Issued 1990 Topical Jan Dec 1991 DBD-S023-TR-EQ Environmental Rev-0 Issued 91 Qualification Topical Apr Dec 1991 DBD-S023-TR-PL Plant Level Rev-0 Issued 91 Topical Feb Dec 1991 DBD-S023-TR-HZ Hazards Topical Rev-0 Issued 91 Phase 1, see Internal &

Missiles & Pipe Page A4 herein.

External breaks.

Jun Dec 1991 DBD-S023-400 Component Rev-0 Issued 89 Cooling Water System Jan Dec 1991 DBD-S023-410 Salt Water Rev-0 Issued 90 Cooling System Apr Dec 1991 DBD-S023-140 125VDC & 250VDC Rev-0 Issued 90 Systems Mar Dec 1991 DBD-S023-540 Instrument Air & Rev-0 Issued 89

/570 Backup Nitrogen Sys Feb Dec 1991 DBD-S023-800 Emergency

-Rev-0 Issued 91 Phase 1, see Chilled Water page A5 herein.

Systems

-A4 DESIGN BASES DOCUMENTATION PREPARATION SCHEDULE FOR THE YEAR 1992 START REV. 0 DBD ID DBD TITLE REMARKS Date DBD # = System System Title, or Descriptions #

Topical Area May 11st Qtr92 DBD-S023-470 Excore Nuclear Rev-0: Mar 1992 1991 Instrumen tation System Mar 2nd Qtr92 DBD-S023-TR-SF Single Failure 91 Topical Dec 2nd Qtr92 DBD-S023-TR-AA Accident Target:

90 Phase 1 see Analysis Topical 21 of 58 Page A5 herein.

Events in Phase 1 release.

Feb 2nd Qtr92 DBD-S023-710 Plant Protection Includes:

91

/720 Systems (PPS)

Reactor Protection System and Engineering Safety Features (ESF) Actuation System Feb 2nd Qtr92 DBD-S023-780 Auxiliary 90 Feedwater System May 2nd Qtr92 DBD-S023-690 Radiation 1993 DBD moved 91

/700 Monitoring to 1992 Systems May 2nd Qtr92 DBD-S023-120 6.9KV, 4KV &

91 480V Electrical Systems.

Nov 3rd Qtr92 DBD-S023-TR-FP Fire 91 Protection Topical Nov 3rd Qtr92 DBD-S023-TR-AR Appix R, Safe New Entry 91 Shut-down Topical Jan 3rd Qtr92 DBD-S023-590 Fire Protection 1993 DBD moved 92 Systems to 1992 May 4th Qtr92 DBD-S023-360 Reactor Coolant 91 System Jan 3rd Qtr92 DBD-S023-TR-HZ Hazards Topical Remaining HZ 92 Phase 2 Internal &

Elements will (continuation, External, see be incorporated counted once)

Phase 1 Page A3 as Rev-1 of herein.

S023-HZ-TR.

-A5-0 DESIGN BASES DOCUMENTATION PREPARATION SCHEDULE FOR THE YEAR 1993 START REV. 0 DBD ID DBD TITLE REMARKS Date DBD # = System System Title, or Descriptions #

Topical Area Jun 1st Qtr93 DBD-S023-TR-AA Accident Remaining 37 of 1992 Phase 2 Analysis Topical 58 Events as (see Phase 1 Rev-1 of Page A4 S023-TR-AA.

herein)

Dec 2nd Qtr93 DBD-S023-800 Normal Chilled Will be 92 Phase 2 Water System incorporated as (see Emergency Rev-1 Chilled Water, of DBD-S023-800 Phase 1 Page A3)

Jan DBD-S023-TR-IS In-Service New entry.

92 1st Qtr93 Testing (IST)

Topical Dec 4th Qtr93 DBD-S023-TR-ES Electrical 92 Separation Topical Feb 4th Qtr93 DBD-S023-TR-CS Codes and Scope issued 91 Standards Topical Dec 4th Qtr93 DBD-S023-TR-OA Operator Actions Scope Issued 92 Topical Dec 4th Qtr93 DBD-S023-510 Control Element 92 Drive Mechanism 1

Control System May 4th Qtr93 DBD-S023-740 Safety Injection 91 Containment Spray and Shutdown Cooling Systems Dec 4th Qtr93 DBD-S023-460 Incore Nuclear 92 Instrumen tation (NIS)

Dec 4th Qtr93 DBD-S023-TR-PI Piping Topical Scope Issued.

92 1

1

-A6 DESIGN BASES DOCUMENTATION PREPARATION SCHEDULE FOR THE YEAR 1994 START REV. 0 DBD ID DBD TITLE REMARKS Date DBD # = System System Title, or Descrip t ions #

Topical Area TBD 4th Qtr94 DBD-S023-TR-ST Structures and Scope Issued Structural I Topical TBD 4th Qtr94 DBD-S023-TR-SC Seismic Topical TBD 4th Qtr94 DBD-S023-820 Accident Monitoring System TBD 4th Qtr94 DBD-S023-130 120V AC System TBD 4th Qtr94 DBD-S023-750 Emergency Diesel Generators System TBD 4th Qtr94 DBD-S023-430 Fuel Handling and Refueling Systems TBD 4th Qtr94 DBD-S023-390 Chemical and Volume Control System

-A7 DESIGN BASES DOCUMENTATION PREPARATION SCHEDULE FOR THE YEAR 1995 START REV. 0 DBD ID DBD TITLE REMARKS Date DBD # = System System Title, or Descriptions #

Topical Area TBD 4th Qtr95 DBD-S023-770 Containment Systems TBD 4th Qtr95 DBD-S023-250 Main Feedwater Combines Main

/260 Systems FW Systems with Mechanical and Control Systems.

TBD 4th Qtr95 DBD-S023-160 Main and Reheat Includes Steam

/175 Steam Systems Bypass and Control Systems.

TBD 4th Qtr95 DBD-S023-650 Coolant &

/660 Gaseous Radwaste System TBD 4th Qtr95 DBD-S023-810 Post Accident Sampling System TBD 4th Qtr95 DBD-S023-620 HVAC Miscellaneous Ventilation Systems

-A8 D.

DBDs originally planned and included in the total 47 5023 DBDs and are pending a reassessment regarding need/benefit:

S02&3 Topical Security Note:

Safeguard controls limits distribution of Security design 4informati4on.

Therefore, a Security Topical DBD has a lower priority than other planned DBDs.

S02&3 DBD-S023-600 Plant Communication System (Appendix R aspects will be in the Appendix R, Safe Shut-down System DBD.)

.S02&3 DBD-S023-530 Turbine Plant Cooling Water System S02&3 DBD-S023-190 Condenser Air Removal System S02&3 DBD-S023-440 Meteorological/Seismic Monitoring System Note:

Portions of the Meteorological Monitoring System, important to plant safety, will be incorporated into the RMS and AMS DBDs.

SR Seismic Monitoring System inputs to PPS will be incorporated into the PPS DBD.

S02&3 DBD-S023-490 Plant Monitoring System All future S01 DBDs were placed on HOLD in May 1991 and were permanently cancelled as a result of the January 1992 decision to retire Unit 1.

APPENDIX B DBD PROGRAM RELATED DEFINITIONS B.1 Configuration Management:

An integrated process whereby (1) the design requirements for plant structures, systems, components, software, and hardware are defined and documented. (2) changes to these design requirements are identified, documented, controlled, evaluated, and approved or disapproved, (3) approved design changes and implementation status are recorded and reported throughout the life of the.plant which (4) results.in the accurate implementation of design output information into the physical configuration of the plant, and (5) into selected plant configuration documents specifying operations, maintenance, testing, installation, procurement, and training requirements.

B.2 Design Bases:

Information which identifies the specific functions to be performed by a structure, system, or component of a facility, and the specific values or ranges of values chosen for controlling parameters as reference bounds for design.

The values may be (1) restraints derived from generally accepted "state of the art" practices for achieving functional goals, or (2) requirements derived from analysis (based on calculation and/or experiments) of the effects of a postulated accident for which a structure, system, or component must meet its functional goals.

(IOCFR50.2 Definitions).

B.3 Design Bases Training Package: A set of documents which are developed for the purpose of training individuals in the Design Bases area, which include, but is not limited to the following:

1) Lesson Plans

2) Handout Materials

3) Examinations

4) Other Material used in Training B.4 Design Disclosure Documents:

Drawings, P & I Diagrams,,Calculations, Specifications, or Design Bases Documents (DBDs), which define items and which are needed to translate engineering concepts into structures, systems and components.

(SCE Topical QA Manual, Appendix I, Definitions)

B.5 Independent Review: A method of verifying process, procedure or task results by a party other than the one conducting the event. The reviewer may or may not be from an external organization.

B.6 Margins:

The difference between the actual operating point or failure point and the technical specification minimum operating, licensing, or the theoretical design point for a system, component or structure.

B.7 Non-safety Function: Those system, structure, or topic issue functions that support the generation of electrical power and other functions not related to nuclear safety.

B-i2 B.8 NRC Inspections/Surveys: As discussed in Section I. Introduction of this DBD Program Plan, related NRC acronyms used within the DBD industry are:

o SSFI-Safety System Functional Inspection, o SSOMI-Safety System Outage Maintenance Inspection, o EDSFI-Electrical Distribution System Functional Inspection, o DVI-Design Verification Inspection, and o DET-Diagnostic Engineering Team B.9 Open Items:

Those items that are discovered during the performance and evaluation of the design bases document that are discrepant and require correction.

B.10 Operable - Operability: A system, subsystem, train, component, or device shall be OPERABLE or have specified function(s), and when all necessary attendant instrumentation, controls, electrical power, cooling or seal water, lubrication or other auxiliary equipment that are required for the system, subsystem, train, component, or device to perform its function(s) are also capable or performing their related support functions(s).

(Reference Technical Specifications, e.g., Unit 1,Section I, 1.0 Definitions).

B.11 Safety Functions: Those system, structure or topical issue functions that directly or indirectly support one or more of the following plant nuclear safety performance goals:

1) Maintain reactor coolant pressure boundary integrity.

2) Provide capability to shutdown the reactor and maintain the safe shutdown condition.

3) Prevent or mitigate the consequences of accidents which could potentially result in off-site exposures comparable to 10CFR Part 100 guidelines.

The term "safety related" applies to the prevention or mitigation of the consequences of postulated accidents that could cause undue risk to the health and safety of the public.

Important-to-safety relates to "plant safety".

B.12 Validation: Authentication of selected sets of information or determination that a process is being carried out in accordance with approved guidelines or procedures.

The above definitions relate to text within this DBD Program.Plan. For additional definitions related to DBD Preparation activities, refer to DBD-11 Glossary.

APPENDIX C GUIDELINE LISTING OF REFERENCE SOURCES (Summary comparison of Licensing Bases vice Design Bases reference documents)

I. Design Disclosure Documents: documentation that provides information and data needed to translate engineering concepts into structures, systems and components, e.g.:

o

Drawings, o

P&I Diagrams, o

Calculations, and o

Specifications Note:

An analyses document that "define items...engineering concepts...", may also represent a.Design Disclosure Document.

Design Disclosure Documents must be the "documents of record" and so authorized as Design Disclosure Documents. Design Bases Documents (DBDs) for San Onofre are Design Disclosure Documents.

II.

Design Bases Reference Documents: documentation in addition to Design Disclosure Documents that were used in evaluating technical options, provided clarifying analysis, or provided additional definition during or subsequent to the development and establishment of the Design Bases of record, e.g.:

o Safety Analysis Reports (SARs): including Preliminary (PSAR),

Final (FSAR), Updated Final Safety Reports (UFSARs), and related documentation such as, NRC SAR Questions and Licensee Answers (SAR-Q&As), (SONGS, Unit-1 was Final Engineering Report and Safety Analysis-FSA, now UFSAR),

o Fire Hazards Analysis (FHA), Environmental Impact Report (EIR),

Emergency Preparedness Plan (EPP), and the Physical Security Plan (PSP) and associated Q&As, o

Safety Evaluation Reports (SERs): prepared by the NRC, including SEP related NRC correspondence and SEP related Licensee prepared analyses and responses.

o Systematic Evaluation Program (SEP): reports and correspondence (Note, SEP's are only applicable to early vintage nuclear facilities, such as SONGS Unit-1, as designated by the NRC),

o Operating Licenses/Technical Specifications: including previous revisions related to the Design Bases evolution,

C2 o

NRC Regulatory Guides and NRC Reports (NUREGs),

0 Code of Federal Regulations,-Title 10 (10 CFR):

such as Part 50, (10 CFR 50) Appendix A - Criteria - General Design Criteria, Criterion 1 through 64, o

Codes and Standards:

such as American Society of Mechanical Engineering ASME Codes and other related codes and standards used in the development of the design bases and/or refererfced within the Design Disclosure or Design Bases References Documents, 0

NSSS Supplier/Equipment Manufacture/A-E Design Manuals and related design bases of record and associated reference documentation, o

NRC Commitment Correspondence/Documentation:

related to the previously listed Design Disclosure and Design Bases Reference Documentation, are candidate sources for review and evaluation in the development of a DBD program.

III.

Other reference materials:

such as the System Descriptions, normal and emergency procedures and programs, etc., are design/process/program implementing documents that in some cases are integral to DBD development. These documents are not deemed to be Design Disclosure nor Design Bases Reference Documentation.

Extractions from these documents will be annotated within the DBD when they are referenced in DBDs to provide clarification or to demonstrate implementation, on a case by case basis.

IV.

Refer to NES&L 25-1-1 and 25-2-1 Quality Procedures for the.detailed list of Source Reference Documentation Categories used by the DBD Section to manage and record DRD reference documentation.

C3 Closing Statement:

The SCE DBD MISSION STATEMENT is offered as a closing statement of Southern California Edison commitment to develop effective Design Bases Documentation and Reconstitution Program and DBD Products.

"The Primary Mission of the DBD Section is to Effectively Manage the Preparation and Efficient Dissemination of DBD Reports, that:

o establish and document the rationale or 'whys' for the design bases in an accurate, consistent, and useful form, o include existing and select reconstituted design bases, o distinguish between design bases and design details, o provide technical answers regarding the original and modified system/equipment design, and o facilitate quality design, informed technical activities, and configuration management."

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