ML19290C394
| ML19290C394 | |
| Person / Time | |
|---|---|
| Issue date: | 10/05/1977 |
| From: | Angelo J Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| REF-GTECI-A-17, REF-GTECI-SY, TASK-A-17, TASK-OR NUDOCS 8001110177 | |
| Download: ML19290C394 (3) | |
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UNITED STATES e~
4 NUCLEAR REGULATORY COMMISSION I
C W ASHINGTON, D. C. 20555
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OCT L 51977 PROJECT:
SYSTEMS INTERACTION TASK A-17 A/E:
STONE & WEBSTER ENGINEERING CORPCRATION
SUBJECT:
SUMMARY
OF MEETING WITH STONE & WEBSTER ENGINEERING CORPORATION TO DISCUSS SYSTEMS INTERACTIONS IN NUCLEAR POWER PLANTS The NRC staff mat with representatives of Stone & Webster Engineering Corporation in Boston, Massachusetts on September 26, 1977 to discuss the approach to nuclear power plant design by Stone & Webster Engineering Corporation as it relates to systems interactions in nuclear power plants.
The representatives of Stone & Webster Engineering Corporation described the procedures for design control, including the conceptual design phase, operation services review and feedback data retrieval system, interdisciplinary interactions within the design project, and project interaction with engineering resources.
They also described the methods used to perform the failure mode and effects analyses and the reliability analyses.
Stone & Webster's view of systems interactions is a broad scope and not a single process.
It includes such elements as the effects of pipe ruptures; loss of heating, ventilation, and air conditioning systems; testing and maintenance; and operator actions at the control board.
Stone & Webster performs failure modes and effects analyses using the fault tree metnodology for control systems. Typically, such an analysis will result in about 1000 sheets depicting the fault trees for a nuclear power plant. The computer program for these analyses has the capability of producing a fault tree drawing as computer output. The program has capability of accepting reliability data to calculate the overall systems reliability.
Stone & Webster uses the project method of control to the extent that engineers assigned to a project from t te various technical divisions are physically located together as a design unit. A separate group identified as operational services reviews all drawings and system logic diagrams produced by the individual project design units.
1732 M3 8001110/77
s OCT 0 51977 Stone & Webster exercises control over systems interactions early in the design during the conceptual design phase which is performed by a conceptual design unit. At this stage early attention is given to the broad scope considerations which impact on systems interaction such as turbine orientation, routing of high energy lines, separation of non-safety related structures from safety related structures, separation of potential contaminated areas from non-contaminated areas, and separation of units in multi-unit facilities.
Stone & Webster also ma %tains control across projects by use of a control system describec 'n its manual entitled, " Project Manual Model".
This system aids in perfocming system reviews in a unifonn and systematic manner from project to project so as to minimize the potential for missing a review of a system. A computer-based program is used for retrieval of feedback information from other facilities.
Stone & Webster also uses a task force approach for generic problems such as fire protection, spurious valve operations, and valve qualifications. The results are available and applied across all projects.
The presentation by Stone & Webster was sponsored by Howard Venner.
Mr. R. C. DeYoung and J. Angelo from the Division of Project Management attended the meeting.
,Y;~~N J. Angelo, Project Manager Light Water Reactors Branch No. 1 Division of Project Management cc: See Page 3 1732 514
4 OCT 0 51977 Stone & Webster Engineering Corporation cc:
ATTN: Mr. W. J. L. Kennedy Vice President P. O. Box 2325 Boston, Massachusetts 02107 1732 315
.