ML17352A960
| ML17352A960 | |
| Person / Time | |
|---|---|
| Site: | Turkey Point, Saint Lucie  |
| Issue date: | 12/08/1994 |
| From: | Gibson A NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Goldberg J FLORIDA POWER & LIGHT CO. |
| References | |
| NUDOCS 9412280083 | |
| Download: ML17352A960 (35) | |
Text
December 8,
1994 Florida Power and Light Company ATTN:
Mr. J.
H. Goldberg President
- Nuclear Division P. 0.
Box 14000 Juno
- Beach, FL 33408-0420 a
SUBJECT:
MEETING
SUMMARY
MOTOR-OPERATED VALVE ISSUES WITH SPECIAL EMPHASIS ON THE PROCESS FOR CLOSING OUT GENERIC LETTER 89-1'0 Gentlemen:
On November 8,
- 1994, Region II and the Office of Nuclear Reactor Regulation (NRR) held a meeting with all Region II licensees/applicants on the closeout process for Generic Letter 89-10 (GL 89-10), Motor-Operated Valves.
During this meeting Region II and NRR representatives provided the staff position on GL 89-10 closeout and answered questions on the inspection process.
Handouts presented during this meeting are enclosed.
Periodic verification of motor-operated valve performance, after completion of GL 89-10 closeout, was an area of concern voiced by the audience.
Many licensee representatives expressed their concern about continued dynamic testing of motor-operated valves after completion of the closeout process with little to no benefit.
In response, the NRC staff agreed to revisit this issue and provide further information during future industry meetings.
This meeting was a valuable contribution to improving communications between the NRC and licensee's/applicants.
I want to express my gratitude for all those who attended.
Thank you for your cooper4tion.
Sincerely, Original signed by Bruce S. Mallett for:
Docket Nos.:
50-335, 50-389, 50-250 50-251 Albert F. Gibson, Director Division of Reactor Safety Licensee Nos.:
DPR-67, NPF-16, DPR-31, DPR-14
Enclosure:
Handouts 9412280083 941208 PDR
- DOCK 05000335 P
FP&L'istribution w encls:
D. Prevatte, SRI T. Johnson, SRI PUBLIC SEND OFC TO NAHE PDR?
DATE
Yes No COPY?
Rl I:DRS Ccasto:pd
/ 'g/94 Yes OFFICIAL RECORD COPY RII:DRS RCrlenjak
/
/94 RI
/>~/94 Yes No Yes DOCUHENT NAHE:
A:iHOVGL.LTR No NRR:EHEB C
RWessma li/~
/94 Yes
/
/94 No
PROCESS FOR CLOSURE OF STAFF REVIEM OF GENERIC LETTER 89-10 PROGRAMS AND PERIODIC VERIFICATION OF MOV DESIGN-BASIS CAPABILITY TERENCE L.
CHAN
- CHXEF, COMPONENTS AND TESTING SECTXON MECHANICAL ENGXNEERXNG BRANCH OFFXCE OF NUCLEAR REACTOR REGULATXON U.S.
NUCLEAR REGULATORY COMMISSION
PROCESS FOR CLOSURE OF STAFF REVIEW OF GENERIC LETTER 89-10 PROGRAMS PURSUANT TO 10 CFR 50.54(F),
GL 89-10 STATES THAT LICENSEES SHALL NOTIFY NRC IN uRITING WITHIN 30 DAYS AFTER COMPLETION OF GL 89-10 DESIGN-BASIS VERIFICATION.
NRC STAFF MEMORANDUM DATED JULY 12,
- 1994, DESCRIBES THE PROCESS FOR CLOSURE OF THE STAFF'S REVIEW OF THE DESIGN-BASIS VERIFICATION PORTION OF LICENSEES'L 89-10 PROGRAMS.
WHEN A LICENSEE NOTIFIES NRC OF COMPLETION OF ITS GL 89-10
- PROGRAM, NRR PROJECT MANAGER WILL SET UP DISCUSSION BETWEEN NRR TECHNICAL STAFF AND REGION STAFF TO DISCUSS CLOSURE OF NRC STAFF REVIEW OF GL. 89-10 PROGRAM.
FOLLOWING THOSE DISCUSSIONS, NRR PROJECT MANAGER WILL NOTIFY LICENSEE OF ANY NECESSARY INFORMATION TO'LOSE GL 89-10 OR SET UP TELEPHONE CONFERENCE TO DISCUSS CLOSURE OF STAFF REVIEW';BY INSPECTION OR LICENSEE SUBMITTAL.
UPON SATISFACTORY COMPLETION OF NRC STAFF REVIEW, STAFF WILL CLOSE GL 89-10 REVIEW THROUGH LETTER FROM NRR PROJECT MANAGER OR COVER LETTER OF INSPECTION REPORT.
SUPPLEMENTAL INSPECTION GUIDANCE FOR CLOSURE PF STAFF REVIEW OF GL.89-10 PROGRAMS
- 04. 04 SELECT SAMPLE OF MOVs FOR DETAILED REVIEW FROM THE POPULATION OF MOVs IN THE GL 89-10 PROGRAM.
LICENSEE. IS EXPECTED TO HAVE VERIFIED DESIGN-BASIS CAPABILITY OF EACH MOV IN ITS GL 89-3.0 PROGRAM.
LICENSEE SHOULD HAVE AVAILABLE SPECIFIC STATUS FOR EACH GL 89-10 MOV.
PMR LICENSEE MAY DEFER CONSIDERATION OF VALVE.
MISPOSITIONING.
STAFF REVIEW MAY BE CLOSED" IF LICENSEE COMMITS TO CONSIDER MISPOSITIONING IN THE EVENT THAT STAFF DETERMINES THIS RECOMMENDATION REMAINS APPROPRIATE.
04.05 VERIFY THAT LICENSEE HAS PERFORMED DESIGN--
BASIS REVIEWS OF SAMPLED MOVs.
INSPECTORS WILL ASSESS THE'ROGRESS BEING MADE'- BY LICENSEES IN ADDRESSING PRESSURE LOCKING AND THERMAL. BINDING OF GATE VALVES.
SUPPLEMENT 6 TO GL 89-10 PROVIDES INFORMATION:.
ON PRESSURE LOCKING AND THERMAL BINDING OF GATE VALVES.
SUPPLEMENTAL INSPECTION GUIDANCE (CONTXNUED)
VERIFY THAT LICENSEE HAS ADEQUATELY SIZED SAMPLED MOVs.
INFORMATION ON SIZING AND SETTING PROVIDED IN-APRIL. 30,
VERIFY THAT LICENSEE. HAS DEMONSTRATED DESIGN--
BASIS CAPABILITY OF SAMPLED MOVs.
INSPECTORS WILL VERIFY IMPLEMENTATION OF LICENSEE..ACTIONS IN RESPONSE TO SUPPLEMENT 5=.-
TO GL 89-10 ON MOV DIAGNOSTIC EQUIPMENT ACCURACY.
INSPECTORS WILL ASSESS ADEQUACY OF LICENSEE'S TREATMENT'OF MEASUREMENT ERROR IN-THE'NALYSIS OF TEST DATA AND TORQUE SWITCH-SETPOINT ANALYSIS.
SUPPLEMENT' TO GL 89.-10. PROVIDES-INFORMATION'N DEMONSTRATION OF MOV DESIGN-BASIS CAPABILITY, INCLUDING GROUPING.
VERIFY THAT THE LICENSEE HAS ESTABLISHED A METHOD FOR PERIODIC VERIFICATION.
e PDETAILS ON A FOLLOWING SLIDE3
SUPPLEMENTAL INSPECTION GUIDANCE (CONTXNUED) 04.09 VERIFY THAT LICENSEE HAS ANALYZED MOV FAILURES AND HAS EFFECTIVE CORRECTIVE. ACTION.
- PLAN, AND THAT LICENSEE TRENDS MOV FAILURES; INSPECTORS WILL.CONSIDER LICENSEE RESPONSE=TO:.
NRC INFORMATION NOTICES, INDUSTRY TECHNICAL..
AND MAINTENANCE UPDATES, AND 10 CFR PART 21-NOTICES.
04.10 VERIFY THAT THE LICENSEE IS MEETING PROGRAM SCHEDULE.
SUPPLEMENT
- 6. TO'L 89-10 PROVIDES"GUIDANCE=
FOR LICENSEES THAT CANNOT MEET GL 89-10 SCHEDULE. COMMITMENTS.
04.11 VERIFY QUALITY ASSURANCE PROGRAM IMPLEMENTATION IN DESIGN CONTROL AND'ESTING.
PREVIOUS INSPECTION ISSUES INSPECTORS WILL REVIEW RESOLUTION OF. PREVIOUS INSPECTION ISSUES, SUCH AS JUSTIFICATION FOR THE GL 89-10 PROGRAM ASSUMPTIONS (VALVE FACTOR, STEM FRICTION COEFFICIENT, LOAD SENSITIVE BEHAVIOR, AND'THERS)
F REACTIVE LIMITED-WILLTYPICALLYADDRESS ADEQUACY OF FAILURE EVALUATIONSAND CORRECTIVE ACTIONS 2.
MAINTENANCERULE BROAD - PERIODIC VERIFICATION, TRENDING, LUBRICATION;POST MAINTENANCElMODIFICATIONTESTING, ETC 3.
POSSIBLE FOLLOWUP MODULE
CLOSURE OF NRC STAFF REVIEM OF GENERIC LETTER 89-10 PROGRAMS THOMAS 6.
SCARBROUGH MECHANICAL ENGXNEERING BRANCH OFFiCE OF NUCLEAR REACTOR REGULATXON O.S.
NUCLEAR REGULATORY CONMXSSXON
A) r
STATUS OF GENERIC LETTER 89-10 CLOSURE STAFF COMPLETED OUR REVIEW OF THE GL 89-10 PROGRAM AT THE CALLAWAY NUCLEAR POWER PLANT.
OTHER NUCLEAR PLANTS THAT HAVE NOTIFIED THE STAFF OF THE COMPLETION OF THE DESIGN-BASIS CAPABILITY VERIFICATION. PORTION OF THEIR GL 89-10 PROGRAMS INCLUDE:
COMANCHE PEAK 1 aNn 2
FARLEY 1 aNn 2
HARRIS HOPE CREEK PALO VERDE 3 PRAIRIE ISLAND 1 ann 2
SOUTH TEXAS 1 ann 2
WATERFORD CRYSTAL RIVER FORT CALHOUN HATCH 1 ann 2
LIMERICK 1 POINT BEACH 1 ann 2
ROBINSON TURKEY POINT 3 BASED ON AGREEMENT BETWEEN THE LICENSEE AND NRC
- STAFF, FORT CALHOUN IS SUBMITTING INFORMATION TO-JUSTIFY CLOSURE OF THE STAFF REVIEW OF ITS GL 89-10:
PROGRAM.
SOUTH TEXAS AND WATERFORD HAVE UNDERGONE GL 89-10 CLOSE-OUT INSPECTIONS AND THE STAFF IS NEARING CLOSURE OF OUR GL 89-10 REVIEW.
TMI AND MAINE YANKEE INITXALLYNOTIFIED THE STAFF.
THAT THEY BELIEVED THAT THEIR GL 89-10 PROGRAMS WERE.
- COMPLETE, BUT SUBSEQUENT INSPECTXONS REVEALED THAT ADDITIONAL WORK WAS NECESSARY.
THESE LICENSEES ARE SUBMITTING SCHEDULE EXTENSXON JUSTIFICATIONS.
PRINCIPAL LICENSEE ACTIONS FOR CLOSURE OF STAFF REVIEW OF GL 89-10 PROGRAMS MOV DESIGN-BASIS CAPABILITY LXCENSEE JUSTIFIES DESIGN-BASIS CAPABILXTY FOR EACH MOV XN GL 89-10 PROGRAM AND HAS ESTABLISHED A PROCESS FOR OBTAINING FURTHER XNFORMATION WHERE NOT; SATISFIED WITH JUSTIFICATION FOR CERTAIN MOVs.
PRESSURE LOCKING A D THERMAL BI DING LICENSEE DEMONSTRATES PROGRESS BEING MADE TO RESOLVE CONCERN ABOUT POTENTIAL. PRESSURE LOCKING AND'THERMAL BINDING OF.- GATE'VALVES.
PWR VALVE MISPOSITIO ING PWR LICENSEE CONSIDERS VALVE MISPOSITIONING, OR COMMITS TO CONSXDER VALVE. MISPOSITIONING IF STAFF DETERMINES THAT THIS RECOMMENDATION REMAINS.'PPROPRIATE.
PERIODIC VERIFICATION OF MOV DESIGN-BASIS CAPABILXTY.
LXCENSEE ESTABLXSHES LONG-TERM PLAN FOR PERIODIC; VERIFICATION THAT DEMONSTRATES THAT DEGRADATION OF DESIGN-BASIS CAPABILITYWILL BE IDENTIFIED.
EXAMPLES'F ACCEPTABLE PERIODIC VERIFICATION PLANS.
FOR GL 89-10 CLOSURE ARE (1)
DYNAMIC DIAGNOSTIC
- TESTING, OR (2)
STATXC DIAGNOSTIC TESTING WITH MARGXN BASED ON PLANT-SPECIFXC DYNAMXC TESTING.
LICENSEE ACTIONS (CONTINUED)
JUSTIFICATION OF PROGRAM ASSUMPTIONS LICENSEE JUSTIFIES ASSUMPTIONS USED IN THE GL.89-10:
- PROGRAM, SUCH AS A.
VALVE FACTOR (INCLUDING AREA ASSUMPTION)
B.
STEM FRICTION COEFFICIENT C.
LOAD SENSITIVE BEHAVIOR D.
E.
F.
G.
H.
K.
L.
MARGINS FOR STEM LUBRICATION DEGRADATION AND SPRINGPACK RELAXATION MOTOR PERFORMANCE FACTORS (1)
MOTOR RATING (2)
EFFXCIENCIES. USED IN OPEN AND CLOSE:
DIRECTIONS (3) APPLICATION FACTOR (4)
POWER FACTOR USED IN DEGRADED VOLTAGE CALCULATIONS BASIS FOR EXTRAPOLATION METHOD OF PARTIAL D/P THRUST MEASUREMENTS TORQUE SMXTCH REPEATABILITY USE OF LXMITORQUE, KALSI, OR OTHER SOURCES FOR.
INCREASING THRUST AND TORQUE ALLOWABLE.LIMITS EQUIPMENT ERROR POST-MAXNTENANCE TESTING, ESPECIALLY VALVE PACKING ADJUSTMENTS GROUPXNG OF MOVs TRENDING OF MOV PROBLEMS.
LICENSEE ACTIONS (CONTINUED)
RESOLVE GL 89-10 INSPECTION FINDINGS LICENSEE RESOLVES FINDINGS FROM PREVIOUS GL 89-10 INSPECTIONS.
IN GENERAL, MOST SIGNIFICANT GL 89-10 INSPECTION CONCERNS HAVE BEEN:
(1)
STATUS OF-DYNAMIC.TESTING; (2) TEST ACCEPTANCE CRITERIA'3)
OPERABILITY/REPORTABILITYDETERMINATIONS; (4)
FEEDBACK OF TEST RESULTS; AND (5)
EVALUATION OF POTENTIAL FOR PRESSURE:
LOCKING AND THERMAL BINDING OF GATE VALVES; OTHER LICENSEE ACTIVITIES FOUND TO NEED IMPROVEMENT:
(1) VALIDATION OF ASSUMPTIONS IN MOV SIZING. ANO:.
SETTING CALCULATIONS; (2) JUSTIFICATION OF MOV GROUPING FOR TESTING-PURPOSES; (3) VERIFICATION OF'XTRAPOLATION METHODS-FOR TEST DATA;
.(4)
EVALUATION OF DIAGNOSTIC TRACE ANOMALIES; (5)
INVOLVEMENT OF QA IN VERIFYING TEST DATA AND" ANALYSES ACCURACY; (6) JUSTIFICATION FOR METHOD TO PERIODICALLY VERIFY DESIGN-BASIS CAPABILITY; (7)
CORRECTIVE ACTION IN RESPONSE TO MOV PROBLEMS; AND (8)
POST-MAINTENANCE TESTING FOLLOWING ACTIVITIES THAT MIGHT AFFECT MOV PERFORMANCE.
UNDER DYNAMIC CONDITIONS.
LICENSEE ACTIONS (CONTXNUED)
ADDRESS CURRENT MOV ISSUES AND CONCER S
LICENSEE RECOGNIZES AND HAS PLAN TO ADDRESS CURRENT MOV ISSUES AND CONCERNS, SUCH AS ACTUAL TORQUE OUTPUT OF LIMITORQUE ACTUATORS LOWER THAN ANTICIPATED.
REDUCTION IN DC AND AC MOTOR SPEED DURING OPERATION UNDER DEGRADED VOLTAGE, DIFFERENTIAL
- PRESSURE, AND HIGH AMBIENT TEMPERATURE CONDITIONS.
ENSURING THE CAPABILITY OF MOV TO RETURN TO.
SAFETY POSITION FOLLOMING TESTING IF MOV IS ASSUMED TO BE OPERABLE DURING TESTING.
EVALUATION OF POTENTIAL ADVERSE EFFECTS OF MOTOR STALL. AND THERMAL OVERLOAD TRIP, INCLUDING STRUCTURAL AND MOTOR DAMAGE.
CHAFING OF WIRES INSIDE LIMIT SWITCH COMPARTMENT CAN CAUSE LOSS OF FUNCTION.-'.
GLOBE VALVE THRUST REQUIREMENTS FOR PUMPED FLOM-APPARENTLY CONTROLLED BY SEAT OR GUIDE AREAS.
INDUSTRY GLOBE VALVE BLOMDOMN TESTING SHOWED SIGNIFICANTLY HIGHER THRUST REQUIREMENTS THAN PREDICTED.
INDUSTRY AND NRC-SPONSORED GATE VALVE BLOMDOMN TESTING SHOWED SOME VALVES TO HAVE UNPREDICTABLE BEHAVIOR.
CALLAWAY GL 89-10 PROGRAM GL 89-10 PROGRAM SCOPE:
150 MOVs DYNAMICALLYTESTED:
103 MOVs DESIGN-BASIS CAPABILITY OF MOVs NOT DYNAMICALLY TESTED BASED ON GROUPING MITH OTHER TESTED MOVs AT CALLAMAYAND OTHER SOURCES.
PERIODIC VERIFICATION:
MOVs STATIC TESTED USING DIAGNOSTICS EVERY 5 YEARS.
STATIC MARGIN FOR VALVE FACTOR DEGRADATION (SEPARATE. AND DISTINCT FROM OTHER UNCERTAINTIES)
FOR RISING-STEM MOVs INITIALLYSET AT 25~~ MITH-SAMPLE. DYNAMIC TESTING TO JUSTIFY AT NEXT REFUELING OUTAGE.
STATIC MARGIN FOR AGE-RELATED DEGRADATION FOR QUARTER-TURN MOVs TO BE DETERMINED BASED ON SAMPLE-:DYNAMIC TESTING AT NEXT REFUELING OUTAGE.
DYNAMIC TESTING PERFORMED IF STATIC MARGIN FALLS BELOM ESTABLISHED CRITERIA.
PRESSURE LOCKI G AND THERMAL BI DING OF GATE VALVES:
LICENSEE PERFORMED INITIALEVALUATION OF ALL SAFETY-RELATED MOTOR-OPERATED GATE VALVES-ADDITIONAL EVALUATION MILL BE NECESSARY.
CALLAWAY GL 89-10 PROGRAM (CONTINUED)
NRC LETTER NOTIFYING LICENSEE OF CLOSURE OF STAFF REVIEW OF CALLAWAY GL 89-10 PROGRAM FORWARDED ON JUNE 8, 1994.
LETTER INDICATES LICENSEE'S PLANS TO CONDUCT THE FOLLOWING ACTIVITIES TO ENSURE THAT ASSUMPTIONS USED.'.
IN VERIFYING GL 89-10 MOV DESIGN-BASIS CAPABILITIES.
REMAIN VALID 1.
EVALUATE JUSTIFICATION FOR DESIGN-BASIS CAPABILITY OF 18 MOVs AS ADDITIONAL INDUSTRY INFORMATION BECOMES AVAILABLE.
2.
CONTINUE TO ASSESS USE OF LINEAR EXTRAPOLATION OF MOV PERFORMANCE DATA.
3.
CONTINUE TO EVALUATE PRESSURE LOCKING AND THERMAL BINDING OF GATE VALVES; 4.
PERFORM PERIODIC MOV PERFORMANCE VERIFICATION BY DYNAMIC TESTING GATE AND GLOBE MOVs WHEN MARGIN IS LESS THAN 25 PERCENT AFFAIR REQUIRED THRUST ADJUSTED FOR UNCERTAINTIES.
FOLLOWING NEXT REFUELING OUTAGE, PROVIDE STAFF WITH DYNAMIC TEST-BASED INFORMATION CONFIRMING 25~o STATIC MARGIN FOR GATE AND GLOBE VALVES AND ESTABLISHING MARGIN FOR AGE-RELATED DEGRADATION FOR BUTTERFLY VALVES.
FORT CALHOUN GENERIC LETTER 89-10 PROGRAM GL 89-10 PROGRAM SCOPE:
29 MOVs DYNAMICALLYTESTED:
20 MOVs DESIGN-BASIS CAPABILITY OF MOVs. NOT DYNAMICALLY TESTED BASED ON GROUPING WITH OTHER TESTED MOVs AT FORT CALHOUN AND OTHER SOURCES.
PERIODIC VERIFICATIO:
INSPECTION REPORT 94-05 STATES THAT LICENSEE-'S-"
PLAN FOR PERIODIC VERIFICATION INCLUDES'YNAMIC:
TESTING.
PRESSURE LOCKING AND THERMAL BI DING OF'ATE VALV LICENSEE. EVALUATED GL.89-10 MOVs AND FOUND NONE SUSCEPTIBLE TO PRESSURE. LOCKING.
ADDITIONAt EVALUATION MILL BE NECESSARY.
LICENSEE PREPARING SUBMITTAL TO SUPPORT" CLOSURE OF-STAFF REVIEM OF FORT CALHOUN GL 89-10 PROGRAM
WATERFORD GENERIC LETTER 89-10 PROGRAM GL 89-10 PROGRAM SCOPE:
56 MOVs DYNAMICALLYTESTED:
44 MOVs DESIGN-BASIS CAPABILITY OF MOVs NOT DYNAMICALLY TESTED BASED ON GROUPING WITH OTHER TESTED MOVs AT WATERFORD AND OTHER SOURCES.
PERIODIC VERIFICATION:
MOVs STATIC TESTED USING DIAGNOSTICS EVERY 5 YEARS.
STATIC MARGIN FOR VALVE FACTOR DEGRADATION (SEPARATE AND DISTINCT FROM OTHER UNCERTAINTIES)
FOR GATE MOVs INITIALLYSET AT 25: WITH SAMPLF=
DYNAMIC TESTING TO JUSTIFY AT NEXT REFUELING OUTAGE.
DYNAMIC TESTING PERFORMED IF STATIC MARGIN FALLS BELOW ESTABLISHED CRITERIA.
LICENSEE PREPARING RESPONSE-'. TO CLOSE-OUT INSPECTION REPORT ON PERIODIC VERIFICATION (INCLUDING GLOBE AND BUTTERFLY VALVES) AND POST:
MAINTENANCE TESTING.
PRESSURE LOCKING AND THERMAL BINDING OF GATE VALVES:
LICENSEE DETERMINED THAT 8 GATE VALVES WERE POTENTIAL SUSCEPTIBLE TO PRESSURE LOCKING AND
. EVALUATED THEIR CAPABILITY TO OVERCOME THIS CONDITION.
STAFF DID NOT REVIEW CALCULATIONS FOR TECHNICAL MERIT.
LICENSEE PERFORMED PRELIMINARY EVALUATION OF THERMAL BINDING.
ADDITIONAL EVALUATION WILL BE NECESSARY.
PERIODIC VERIFICATION OF MOV DESIGN-BASIS CAPABILITY FOR GL 89-10
- CLOSURE, LICENSEES ARE EXPECTED TO HAVE.
A LONG-TERM PLAN FOR PERIODIC VERIFICATION THAT DEMONSTRATES THAT DEGRADATION OF MOV DESIGN-BASIS.
CAPABILITY WILL BE IDENTIFIED.
LICENSEES MAY USE PRA CONSIDERATIONS TO PRIORITIZE MOVs IN ESTABLISHING PERIODIC VERIFICATION FREQUENCY.
LICENSEES MUST HAVE CONFIDENCE THAT SAFETY-RELATED..
MOVs MILL REMAIN OPERABLE UNTIL NEXT SCHEDULED DESIGN-BASIS VERXFICATION TEST.
NRC STAFF IS WORKING WITH THE OPERATIONS AND MAXNTENANCE COMMITTEE OF THE ASME BOILER AND PRESSURE VESSEL CODE TO DEVELOP ACCEPTABLE METHODS TO VERIFY MOV DESIGN-BASIS CAPABILITY THROUGH PERXODIC TESTING.
EXAMPLES OF ACCEPTED PERIODIC VERIFICATION PLANS FOR-GL 89-10 CLOSURE ARE (1)
DYNAMIC DIAGNOSTIC TESTING; OR (2) STATIC DIAGNOSTIC TESTING WITH MARGIN BASED ON PLANT-SPECIFIC DYNAMIC TESTING.
AFTER CLOSURE OF THE STAFF'S REVIEW OF GL 89-10
- PROGRAMS, LICENSEES MAY ADJUST THEIR COMMXTMENTS TO PERIODIC VERXFICATION OF MOV DESXGN-BASIS CAPABILITY WITH ADEQUATE JUSTIFICATION.
1989-93 Region 2 MOV Reportable Events Motor Operator Failures Year K~ Total I1993
~ 19S2 S 1991
~ 19SO
- 1989 12
't0 M
c 6
0 UJ 1989
'9'f
'90
'92
'93 0
Pegjop 2 $jceqsees by Uiijt
] 7 Units had no reportable faillires dui'jlig tt1js pei'jorI
'P
1989-93 National MOV Reportable Events Motor Operator Failures 30 25:-:::::::::::
20:::.:'
15::::::,.::::,
10 0
1989 1990 1991 Year 1992 1993 8 Pegjori 2 IG~(pqjops t,),$,6 lI'
%t 1A
1989-94 Region 2 MOV Reportable Events Motor Design, Const, rab, or Installation Errors
- Total
~ 1994 S 1S93
~:::::::: 1992 I 1SS1
~<: 1990
'::::::: 1989 z',~
6 4
vi r
'91
~Q'3
'93 9
~sl T
1989-94 National MOV Reportable Events Motor Design, Const, Fab or Installation Failures 20
~ 15 n 10 0
1S91 Year 1992 1993 1994
- '::: PegIoq 2 8gegjops ],3,$,5
1989-94 Region 2 MOV Reportable Events Valve Failures Due to Design, Fab, or Installation errors
+"': Total
~ 1994 b1993 b 1S92
~4! 1991
- =-'~!"'990 k'SBS
,", ~'0 10 4
0 0
pegiol1 2 Ljcepsees py Upset 7 Units had po reported vaiye failules riufirigthis period I
r
1 S8S-S4 National OV Reportable Events Valve Failures due to Design, Const, Fab or installation Errors 100 80 60 40 20 0
1989 1990 1991
'(eai 1S92 1SS3 1994 H Region 2 5 Regions 1,3,$,5
I'P
1989-94 National MOV eportable Events Valve Failures Requiring Repair 250 200
~ 150
~ 100 60 0
1989 1990 1991 peal'992
'1993 1994 G Pegion 2 ~ Regions ],3,4,5
0 I
T