ML19260D576
| ML19260D576 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 01/15/1980 |
| From: | Mcgaughy J MISSISSIPPI POWER & LIGHT CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| Shared Package | |
| ML19260D572 | List: |
| References | |
| AECM-80-20, NUDOCS 8002110446 | |
| Download: ML19260D576 (3) | |
Text
's
.m
(
MISSISSlii bPOWER & LIGHT COMPANY
~
P l h Helping Build Mississippi
~"*
P. O. B O X 164 0, J A C K S O N, MI S SIS SIP PI 3 9 2 0 5
\\0 W
PRODUCTION DEPARTMENT January 15, 1980 U. S. Nuclear Regulatory Commission Region II 101 W rietta Street, N. W., Suite 3100 Atlanta, Georgia 30303 ATTENTION:
Mr. J. P. O'Reilly, Director
Dear Sir:
SUBJECT:
Grand Gulf Nuclear Station File 0260/L-860.0/10970/8010/992J IE Inspection Report Nos.
50-416/79-15 and 50-417/79-15 (PGCC)
AECM-80/20 In our letter to you of November 12, 1979, Mississippi Power 6 Light Company (MP6L) requested an extension until January 15, 1980 to respond to the subject inspection report and infraction contained therein. Further, we stated that our response would be dependent upon interpretations render-ed at a meeting with NRC to be held November 16, 1979 in Bethesda, Maryland.
The subject infraction noted that certain activities were apparently not conducted in full compliance with the requirements of the Grand Gulf FSAR as stated in General Electric (G. E.) NEDO - 10466, Revision 1.
The November 16, 1979 meeting was requested in order for G. E. to discuss the intent of that NEDO document with the Regulatory Staff.
During that meeting, G. E. clarified the intent of the NEDO reference to MIL-5015 G and described the requirements placed on the connectors. Additionally, G. E. discussed the rationale used to develop the 8 and 15 pound pull test values and results of preliminary tests that have been conducted to confirm the adequacy of those values. Validity of field inspections conducted at the Grand Gulf site was also addressed.
In a letter of December 13, 1979 to 0. D. Parr of the NRC, G. E. docu-mented all the information presented at the meeting and proposed revisions to the NEDO to remove any ambiguities regarding connector requirements.
In a letter from E. P. Stroupe of G. E, to 0. D. Parr on January 10, 1980, Errata and Addenda sheets applicable to NEDO 10466-A were submitted for NRC approval in order to implement these proposed revisions. MP&L will update the Grand Gulf FSAR to reflect these revisions if they are ultimately approved by the NRC.
In response to the three (3) questions asked in the fourth paragraph of your letter of October 18, 1979:
4 n3 )
37g a,
8002110
-_M t_
2ed
. 4 7 iG AL CE*PY Member Middle South Utilities System
MISSISSIPPI POWER & LIGHT COMPANY L
Mr. J. P. O' Reilly Nuclear Regulatory Commission Page two (1) Corrective steps which have been taken and the results achieved.
MP6L acknowledges that initially there were inadequate procedural controls to define connector pull test values.
G. E. has determined through preliminary tests that a pull test value of 15 pounds for 16 AWG wire and 8 pounds for 20 AWG is sufficient to ensure that the connectors possess adequate electrical and mechanical properties.
G. E. is now planning a full range of tests to con-firm and document these preliminary results.
Additionally, the connectors at the Grand Gulf site have been inspected and tested to these 8 and 15 pound pull values. The results of these inspections at Grand Gulf along with information on G. E.'s preliminary tests for adequacy of the 8 and 15 pound pull test values were presented at the November 16 meeting and submitted via the December 13 letter.
(2) Corrective steps which will be taken to avoid further non compliance.
All inspections for crimp strength at the Grand Gulf site have been and will be conducted utilizing the 8 and 15 pound criteria.
(3) The date when full compliance will be achieved.
All inspection and testing activities will be complete by September, 1980.
We believe these actions will be sufficient to address and close the subject infraction.
The subject inspection report also contained eight (8) unresolved items pertaining to the adequacy of the Grand Gulf Nuclear Station PGCC cables and connectors.
These unresolved items were also discussed exten-sively during the November 16 meeting. MP&L is addressing all of these items and hereby asks for a meeting with your office on February 14, 1980 to discuss the actions that are presently under way.
These actions are summariz-ed in the following paragraphs.
G. E. is launching a comprehensive testing program to determine the effects of various anomolous conditions on performance of cable / connector assemblies during design life as installed in PGCC. Anomolies tested will include low force crimps, damaged insulation and broken wire strands. Aging, seismic and environmental effects will be evaluated for these anomolous conditions.
Cable connector clamps will be included in the scope of these tests. As stated above, these tests are scheduled to be complete by September, 1980.
MP6L is evaluating a proposal from a consultant possessing laboratory facilities and expertise suf ficient to perform independent tests to verify the overall quality of the PGCC connectors in their present state. No determina-tion has yet been made on the scope or magnitude of work necessary for MP6L tc assure this quality level; however, we expect to finalize this plan in the very near future.
,n*1 1'5 s
MISSISSIPPI POWER & LIGHT COMPANY Mr. J. P. O'Reilly Nuclear Regulatory Commission Page two The purpose of the February 14, 1980 meeting that we are requesting is to preser.t the test plans and describe all the actions being taken by MP6L to resolve the spectrum of concerns expressed by D. K. Walters.
Yours truly, t
- h. } * )$ UlI v il -)
- J. P. McGaughy, Jr.
Director of Power Production LFD/pa cc:
Mr. N. L. Stampley Mr. R. B. McGehee Mr. T. B. Conner Mr. Victor Stello, Jr., Director Division of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555 i
1 7 [3 q*1 4
,