ML20215E720
| ML20215E720 | |
| Person / Time | |
|---|---|
| Issue date: | 12/05/1986 |
| From: | Heltemes C NRC OFFICE FOR ANALYSIS & EVALUATION OF OPERATIONAL DATA (AEOD) |
| To: | Charbonneau A MOVATS, INC. |
| Shared Package | |
| ML20215E592 | List: |
| References | |
| NUDOCS 8612230086 | |
| Download: ML20215E720 (3) | |
Text
- - _ _
y N December 5, 1986
- Mr. Arthur C Charbonneau, Presidtnt (MOVATS Incorporated AE00/C603
,2999 Johnson Ferry Road
-Marietta, Georgia -30062
~
Dear Mr. Charbonneau:
SUBJECT:
CASE STUDY REPORT - A REVIEW 0F MOTOR-OPERATED' VALVE PERFORMANCE
.The Office for Analysis and Evaluation of Operational Data (AE0D) has finalized its case study on.a review of motor-operated valve performance. The final report addresses the peer review comments provided by NRR,.IE, RES, the Regions, INP0, NSAC, MOVATS Inc., and Toledo Edison Company. The study report-brings together previous NRC studies and other related documents (i.e., AE0D
. reports and.IE bulletins, circulars, and information notices), reviews- 4 approximately 1200 valve operator events (SCSS and NPRDS) from 1981 to mid-1985, j and. incorporates new data from an NRC valve testing program that utilized .I signature tracing techniques on valve assemblies in operating plants. We have enclosed a copy of our final report for your information so that you will be aware of how we incorporated the information concerning the " Industry Average"
< signature tracing test data that you provided.
This study was performed in response to action' item 6(i) of the actions directed by the Executive Director for Operations to respond to the NRC staff hivestigations of the June 9,1985 event at Davis-Besse. Our case study l- unort concludes that current methods and procedures at many operating plants we est adequate to assure that valves will operate when needed. Furthermore, l the eficiencies would generally.not be detected by existing plant procedures' intended to assure operability, such as surveillance testing (plant technical specifications and ASME Code,Section XI inservice testing) or plant operator ;
observations. Thus, assurance of valve operability appears to be strongly i dependent upon diagnostic capability. to assess and evaluate failures to operate so that root causes of failure--including switch setpoint--are correctly determined and proper changes implemented. Further, the issue of
-valve assembly performance and reliability.is:a complex subject that involves-several technical disciplines..
The enclosed case study report contains several specific recommendations directed toward addressing valve assembly performance and reliability problems. We understand that the NRC Executive Director for Operations will i request that NUMARC unoertake appropriate industry initiatives to address the
!- , problems identified in the AE0D report.
6 8612@
%2 h PDR
7 l .
- s.
L Mr. Authur G. Charbonneau 1
- A copy of the final case study report and this letter are being placed in the Public Document Room at 1717 H Street, N.W., Washington, D.C. 20555.
If you or your staff have any questions regarding this report, please contact Earl J. Brown of my staff. Dr. Brown can be reached at (301) 492-4437.
Sincerely, W 8ea*8 W C. J. He%.a es, Jr.
C. J. Heltemes, Jr., Director Office for Analysis and Evaluation of Operational Data
Enclosure:
As stated DISTRIBUTION:
PDR AE0D SF AE0D CF ROAB SF ROAB CF EBrown l MChiramal SRubin WLanning KBlack MWilliams FHebdon CHeltemes DHumenansky, OCM l
l l
l l
- See next sheet for previous concurrence I
0FC :ROAB :ROAB:SC :ROAB:BC :AEOD D :AEOD:D : : ,
.{4_....:___________ :___________
NAME :EBrown:nc :MChiramal :SRubin :FHe don :CH femes : :
DATE :12/ 4/86 * :12/ 4/86 * :12/ 4/86 * :12/ f/86 :12/(786 : :
OFFICIAL RECORD COPY
k e e
Mr. Authur G. Charbonneau A copy of the final. case study report and this letter are being place in the Public Document Room at 1717 H Street, N.W., Washington, D.C. 20555 If you or your staff have any ouestions regarding this report, pl se contact Earl J. Brown of my staff. Dr. Brown can be reached at (301) 49 -4437.
C . J . Hel temes , J r. , irector Office for Analysis nd Evaluation of Operational D a
Enclosure:
As stated DISTRIBUTION:
PDR AE0D SF AE0D CF ROAB SF R0AB CF EBrown MChira 1 SRubig/
WLan91ng KBlatk MWilliams Fyebdon eltemes Humenansky, OCM OFC :R ROAB: Sci :ROAB:BC :AEOD:DD :AEOD:D : :
_____:. 3(L______::_______ W __:____________:____________:____________:____
L NAME :EB own:nc :MChiramal :SRubin :FHebdon :CHel temes : :
DATE':12/V/86 :12/L '/86-
- 12/ 4 /86 :12/ /86 :12/ /86 : :
OFFICIAL RECORD COPY 4
l
- . _ - - . . . ,,- . _ ,