ML20125A795

Rev 5 to Operations QA Plan Design & Modification Control

ML20125A795
Person / Time
Site:	South Texas
Issue date:	12/01/1992
From:	HOUSTON LIGHTING & POWER CO.
To:
Shared Package
ML20125A780	List: ML20125A795 ST-HL-AE-4266, Forwards Rev 5 to Chapter 6, Operations QA Plan Design & Mod Control
References
NUDOCS 9212090058
Download: ML20125A795 (6)

Text

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SW 72d (02/90)

SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION ff Chapter 6.0 5 OPERATIONS QUALITY ASSURANCE PLAN Pact y or 6 ~

DESIGN AND MODIFICATION CONTROL trrtenw DAtt 12-21-90 1.O EUREQDI 1.1 The purpose of this chapter is to establish the requirements and responsibilities for design control of now structures, systems or components, and modification control of existing structures, systems, or componerts at the South Texas Project Electric Generating Station (STPEGS).

2.0 ECQEE 2.1 This chapter applies to the design and modification activities associated with the preparation and review of design documents including the translation of applicable Code of Federal Regulation-requirements and design bases into design documents.

3.0 DIEIH1TIQRE 3.1 None 4.0 REIIREHCEE 4.1 STPEGS Technical Specifications 4.2 OQAP Chaptcr 5.0, Maintenance, Installation of Modifications, and Related Activities 4.3 OQAP Chap':9r 14.0, Records Control 4.4 10CFR50.59, Changes, Tests and Experiments 5.O REQRIREMEHIS 5.1 Measures shall be established to document selection of design inputs.- Changes to specified design inputs,.

including identification of their source, shall be identified and documented. As the design evolves, any unreviewed safety. question evaluations shall be performed as required by 10CFR50.59.

5.2 Measures shall be-established to control design activities to assure design inputs are translated into design documents such as specifications, drawings, procedures,. or instructions..

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SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION Eof t Chapter 6.0 5 __

OPERATIOllS QUALITY ASSURANCE PLAli PAGE g Of g i DESIGli AND MODIFICATION CONTROL trrtemt DAR 12-21-90 5.2.1 Design activitics involving reactor physics;  !

stress, thermal, hydraulic, and accident analysis; materials compatibility; and accessibility for maintenance, inservico inspection, and repair will be performed  ;

according to approved procedures by appropriately qualified individuals. Results of analyses will be appropriately verified and 7

documented.

5.2.2 Design documents shall include appropriate '

quality standards. If an alternato quality requirement is used (e.g., other than the originally specified quality standard) the chango shall be documented and approved.

5.2.3 Design analyses shall be sufficiently detailed as to purp:30, method, asaumptions, design input, references, units, and status (preliminary or final) such that a technically qualified person can review and understand the analyses and verify the adequacy of the results without recourse to the originator.

5.2.4 A review for application suitability of materials, parts, equipment, and processes ossential to the functions of quality-related structures, systems, and components is done as part of the design document preparation and review process. The procedures which govern i the preparation and review of design documents -

require that valid industry standards and specifications be used for this review.

Review of standard off-the-shelf commercial materials, parts, and equipment for suitability of application with quality-related structures, systems, and components

_will be conducted before selection.

Procedures shall identify design: documents y.

which require an inline QA review. This- ~

review is for seismic and quality group classification, selection of quality O standards, and any deviation from quality i standards. ct g

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SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION E Chapter 6.0 $ ,

OPERATIONS QUALITY ASSURANCE PLAN Pact 3 & 6 ,

DESIGN AND MODIFICATION CONTROL rntemt DATt 12-21-90 5.3 Measures shall be established to identify and control design interface among participating organizations (internal and external).

f 5.4 Measures shall be established to verify adoquacy of design and design changes.

5.4.1 The design process shall include design [

verification by qualified persons to assure thr.t the design is adequato and meets specified design input. Design control proceduros shall specify requirements for the soloction and performance of design verification. Design verification shall be either by design review, alternato calculation, qualification testing, or by a combination of these. The depth of design verification shall be commensurate with the importance of the system or component to plant safety, complexity of the design, and similarity of design to previous designs.

5.4.1.1 If the verification method performed is only through qualification testing, the following are required.

o Proceduros shall provide critoria that specify when verification l

should be by test.

I o Prototype, component, or feature testing shall be performed as early as possible before installation of plant equipment, or before the pot.nt when the installation would becomo irreversible.

o verification by test shall be performed under conditions that simulate the most adverse design-conditions as determined by analysis.

5.4.2 Design verification shall be performed by competent individuals or groups other than those who performed the original design.

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SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION E

Chapter 6.0 5 OPERATIO!1S QUALITY ASSURAllCE pLAll PAGE 4 DF g DESIG!i AllD MODITICATION CONTROL trricmt f ---

DAR 12-21-90 Design verification should not be performed by 5.4.3 individuals that have immediato supervisory responsibility for the individual performing the design; have specified a singular design approach; have ruled out certain design considerations; or have established the design inputs for that particular design aspect.

However, the supervisor may perform the verification if the supervisor is the only technically qualified individual and the need for the supervisor to perform the review is approved and documented in advance by the supervisor's management.

5.4.4 Design verification will normally be performed prior to release for procurement, manufacture, installation, or use by another organization in other design activities. Exceptions shall be justified and documented. Procedures shall control the justification of exceptions and the completion of the verification of all affected design output documents prior to relying on the component, system, or structuro to perform its function.

5.5 Haasures shall be established to control the approval, issuance, r.nd changes of design documents to prevent the inadvertent uce of superseded design information.

Design documents include design drawings and specifications, vendor documents, setpoints with  ;

tolerances and design limits.

5.6 Changes made to design documents are reviewed and approved by the samo groups or organization which reviewed and approved original design documents. If the organization which originally approved a particular design document is no longer responsible, another organization may be designated if competent in the specific design area, has access to pertinent background'information and has an adequato understanding of the requirements and-intent of the original design.

5.7 Errors and deficiencies found.in approved design documents,' including design methods, that could adversely qffect quality-related structures, systems, or components shall be documented and action taken to d

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SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION f/f i Chapter 6.0 5 OPERATIOllS QUALITY ASSURANCE PLAN PAGC 5 0F ~

6 DESIGN AND MODIFICATION CONTROL Urtemi DA4 12-21-90  ; ,

correct and provent the recurrence of deficiencies.

S.8 Measures shall be established for the identification and control of deviations from specified quality standards.

5.9 Measures shall be established which assure that maintenance and modifications associated with design changes which may affect the functioning of quality-related structures, systems, or components are i performed in a manner te annure quality at least equivalent to that specified in the UFSAR or other original design bases and requirements.

5.10 Measures shall be established to maintain the list of quality-related structuros, systems, and components curront after modifications are mado.

5.11 Monsures shall be established to assure that only verified, qualified and controlled computer codes are authorized for uso.

! 5.12 Modifications 5.12.1 Modifications to quality-related structures, i

systems, and components chall be controlled, reviewod, and approved. ,

5.12.2 Installation and teating of modifications ,

shall be performed in accordance with Roferenco 4.2 and approved procedures. These proceduros shall contain provisions as appropriato to ensure quality of installation '

and appropriate post modification-testing.

5.12.3 Quality-related structures, systems, and compononts shall not be declared operable after a modification until the following prdvisions are satisfied:

I' 5.12.3.1 Affected procedures are revised and distributed to appropriate users.

l 5.12.3.2- Appropriate personnel are_ trained.

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a Chapter 6.0 5 OPERATIOffS QUALITY ASSURAliCE PLA11 Pact 6 & 6 1 DESIG11 AND HODIFICATIOli CollTROL Tiitcmt DAir 12-21-90 5.13 Plant Modifications will be checked against the design change documentation for proper implementation prior to closing out the design change process.

6.O REC #11EllIATl911 6.1 Procedures which are generated as required by this chapter shall identify the records which are required to implement and document those activities. The records shall be controlled in accordanco with Reference 4.3. ,

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