ML19210E875
| ML19210E875 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 11/29/1979 |
| From: | Houghton T Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7912130127 | |
| Download: ML19210E875 (5) | |
Text
.
[pa afog o
UNITED STATES 8\\
NUCLEAR REGULATORY COMMISSION
,E WASHINGTON, D. C. 20555 k.....,/
NOV 2 91979 DOCKET NOS. 50-416 AND 50-417 APPLICANT: MISSISSIPPI POWER AND LIGHT COMPANY FACILITY:
GRAND GULF NUCLEAR STATION, UNITS 1 AND 2
SUBJECT:
SUMMARY
OF MEETING WITH MISSISSIPPI POWER AND LIGHT COMPANY AND GENERAL ELECTRIC TO DISCUSS CONNECTOR REQUIREMENTS FOR THE POWER GENERATION CONTROL COMPLEX (PGCC).
On November 16, 1979 a meeting was held between representatives of the staff and the General Electric Company (GE) in Bethesda, Maryland to discuss GE's interpre-tation of connector requirements referenced in General Electric Company's Topical Report, " Power Generation Control Complex Design Criteria and Safety Evaluation" (NED010466A). Representatives of Mississippi Power and Light Company (MP8L),
Bechtel Corporation, Pennsylvania Power and Light Company and Phildelphia Electric Company were also present. Attendees are listed in the Enclosure.
Background
By Inspection and Enforcement (I&E) Region II's letter dated October 18, 1979, Mississippi Power and Light Company was cited for an infraction in its quality assurance program. In the notice of violation I&E stated that connectors in the Power Generation Control Complex were not being pull tested to fifty pounds as required by military specification, MIL-C-23216, a daughter standard to MIL-C-5015G which is referenced in the topical report. A pull test of signifi-cantly lower force was being used. MP&L requested clarification of the topical report.'s reference to the military specifications. GE requested a meeting to enable it to explain its intent in referencing the military specifications and its current quality assurance program for the connectors.
Discussion GE provided a brief description of the PGCC, a factory-assembled arrangement of modules, tenninals and panels for the installation of interconnecting wiring of control equipment within the control room.
They stated that the fifty pound pull test required by MIL-C-23216 was applicable only to the verification of the design of the connectors provided by their suppliers, not as an acceptance test to be used for the assembled final product:
(1) the connector design requirements are specified on GE purchase parts drawings specifications; (2) those drawings and specifications identify the applicable por-tions of MIL-C-5015G needed to meet the connector design intent; and (3) MIL-C-23216, 1543 p 7912130 p
-2 NOV 2 91979 which does require a fifty pound pull test, is not specified by GE. Therefore, GE concluded that the topical report phrase "... based on the design requirements, the optimum connector is one that meets (as a minimum) MIL-C-5015G." refers only to qualification of the design of connectors by the connector manufacturer.
To assure that the connector meets this requirement, GE now " samples" a portion of the,1ssembled connectors using a fifty pound pull test. However, it was pointed out that this force results in a destructive test in that the fifty pounds exceeds the yield strength of the annealed copper wire and therefore is an unsatisfactory test fer acceptance of the finished product.
GE described the field pull test values that are used in their quality assurance program to test for the functional adequacy of crimps (in lieu of the fifty pound +
test), and how they verified the connector quality by sampling techniques.
Finally GE provided a summary of their quality assurance program used in the fac-tory and the field before and after the discovery of low strength crimps at the Susquehanna facility, which also uses the PGCC.
(Region I is actively involved in the resolution of this problem).
Conclusion We informed GE that we would require a supplement to the topical report, subject io our detailed review, which would explicitly state their criteria for connector
- palification, and would describe the qualificatiori testing used to prove the adequacy of the crimps. We expressed concern over the aging of connectors, the design lifetime of connectors as specified in the military specifications and the applicability of that design lifetime. GE cc. 'itted to provide a letter reiter-ating their position and describing how they proposed to revise the topical report.
In addition, GE will provide, through Mississippi Power ad Light, an explanation of their position concerning the notice of violation and their requalification program for review by Region II.
G.
,v [
Thomas C. Houghto hs Branch No. 2 Light Water Reacta Division of Project Management
Enclosure:
Attendance List ces w/ enclosure:
See next page 1543 3.10
NOV 2 b 1979 Mr. N. L. Stampley Vice President - Production Mississippi Power and Light Company P. O. Box 1640 Jackson, Mississippi 39205 cc: Mr. Robert B. McGehee, Attorney Wise, Car'.er, Child, Steen and Caraway P. O. Box 651 Jackson, Mississippi 39205 Troy B. Conner, Jr., Esq.
Conner, Moore & Corber 1747 Pennsylvania Avenue, N. W.
Washington, D. C.
20006 Mr. Adrian Zaccaria, Project Engineer Grand Gulf Nuclear Station Bechtel Power Corporation Gaithersburg, Maryland 20760 Mr. R. Johnson BWR-4 Licensing Project Manager General Electric Company 175 Curtner Avenue San Jose, California 95125 Mr. W. Stroupe Manager BWR Licensing General Electric Company 175 Curtner Avenue San Jose, California 1543 331
NOV 2 91979 ENCLOSURE ATTENDANCE LIST KETING WITH MISSISSIPPI POWER AND LIGHT C0WANY AND GENERAL ELECTRIC CO WANY NOVEfBER 16, 1979 NRC - STAFF T. Houghton D. Tibbitts L. Gage, Region I D. Lurie J. Conran T. Dunning D. Sullivan D. K. Walters, Region II
- 0. D. Parr J. Joyce R. Satterfield GENERAL ELECTRIC COWANY D. H. Ferguson B. Woodward R. Post R. Johnson W. Stroupe D. Lockett H. H. Hendon L. D. Test P. M. Briggs A. R. Smith PENNSYLVANIA POWER AND LIGHT C0WANY A. R. Sabol R. A. Schwan A. P. Derkacs S. B. Kuhn BECHTEL 1543 332 A. Bisest M. J. David D. R. Quattrociocchi
1 NOV 4 91gM MISSISSIPPI POWER AND LIGHT C0FPANY L. Nail L. F. Dale T. E. Reaves, Jr.
DUPONT G. W. McManaway A. E. Hadden PHILADELPHIA ELECTRIC C0FPANY A. Spector T. G. Loughran J. H. Walton J. M. Corcoran 1543 333