IR 05000280/1988028
| ML18152B248 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 10/12/1988 |
| From: | Ernst M NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Cartwright W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| References | |
| NUDOCS 8810250471 | |
| Download: ML18152B248 (27) | |
Text
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OCT 11 1988
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Virginia Electric and Power Company
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ATTN: Mr. W. R. Cartwright, Vice President, Nuclear Operations P. 0. Box 26666 Richmond, Virginia 23261 Gentlemen:
SUBJECT:
ENFORCEMENT CONFERENCE SUMMARY NRC INSPECTION REPORT NOS. 50-280/88-28 AND 50-281/88-28 This letter refers to the Enforcement Conference held at 9ur request on September 16, 198 This meeting concerned activities authorized for your Surry facilit The issues discussed at this conference related to foreign materials found in safety-related system flow paths in the containment sumps, implementation of the cleanliness control program for work on safety-related systems, and the subsequent corrective actions in respons*e to Inspection Report Nos. 50-280/88-28 and 50-281/88-28. A conference summary, a list of attendees, and a copy *of your handouts are enclose We are continuing our review of these issues to determine the appropriate enforcement actio In accordance with Section 2.790 of the NRC's "Rules of Practice," Part 2, Title 10, Code of Federal Regulations, a copy of thjs letter and its enclosures will be placed in the NRC Public Document Roo Should you have any questions concerning this matter, please contact u Enclosures:
1. Enforcement Conference Summary 2. List of Attendees 3. Handout J&C w/encls:
../1}. L. Benson, Station Manager
~- E. Hardwick, Manager - Nuclear Programs and Licensing Commonwealth of Virginia
~cc w/encl s:
NRC Resident Inspector DRS Technical Assistant Document Control Desk RII MScoZ.fi'
101 5188 RII RII 'Jtl--*
FCantrell 10/ j /88
Sincerely, Original signed by Malcolm L. Ernst Acting Regional Administrator
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8810250471 881012 PDR ADOCK 05000280 Q
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10/6 /88
ENCLOSURE 1 Enforcement Conference Summary An Enforcement Conference was held at the Region II office on September 16, 1988, to discuss the findings identified in Inspection Report Nos. 50-280/88-28 and 50-281/88-28 with regard to cleanliness and foreign material exclusion controls during maintenance or modification of safety-related system The Deputy Regional Administrator began the meeting with opening remarks which identified our areas of concer Followin~ an acknowledgement of the concerns by the licensee's.Vice President for Nuclear Operat.ions, the Surry Assistant Station Manager for Nuclear Safety and Licensing presented a summary of the condition of the containment sumps after discovery of foreign materia The summary also included a discussion of safety systems which connect to the sump and the testing which identified the cleanliness problem Pre-existing cleanliness controls were discussed as well as most likely causes.of the foreign material problem Root causes of the problem were discussed as weir as short and long-terni corrective action The licensee also concluded that they were aware of a programmatic weakness in cleanliness areas that was identified by internal audit l I
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ENCLOSURE 2 Enforcement Conference Attendees Virginia Electric and Power Company D. Benson, Station Manager, Surry R. Cardon, Manager Nuclear Engineering W. Cartwright, Vice President, Nuclear Operations P. Doody, Project Engineer, Nuclear E. Grecheck, Assistant Station Manager, Surry F. Moore, Vice President, Power Engineering Services G. Panne~ l, Di rector SEC
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W. Stewart, Senior Vice President, Power Operations Nuclear Regulatory Commission M. Ernst, Acting Regional Administrator L. Reyes, Director, Division of Reactor Projects (DRP)
A. liibson, Director, Division*of Reactor Safety (DRS)
B. Wilson, Branch Chief, DRP G. Jenkins, Director, Enforcement and Investigation Coordination Staff F. Cantrell, Section Chief, DRP B. Uryc, Enforcement Coordinator W. Holland, Senior Resident Inspector, Surry L. Nicholson, Resident Inspector, Surry
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ENCLOSURE 3
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warn1@aooa£ ~@w~rn1 NRCENFORCEMENTCONFERENCE SURRY POWER STATION CONTAINMENT SUMP DEBRIS i
SEPTEMBER 16, 1988
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\\VAY/ a rffi a ©£(ru1F\\YAYJ[Rl O@O=flu VICE PRESIDENT-NUCLEAR
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- DEBRIS IN CONT Al NM ENT SUMPS
- SAFETY SIGNIFICANCE
- CORRECTIVE ACTIONS
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E. S. GRECHECK ASSISTANT STATION MANAGER
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- RECIRCULATION SPRAY
- PUMPS - 2 IRS, 2 ORS
- SPRAY RINGS-FOUR 180 DEGREE HEADERS
- LOW HEAD SAFETY INJECTION
- PUMPS - 2 OUTSIDE CONTAINMENT
- INITIAL SUCTION FROM RWST, SWITCHOVER TO RECIRCULATION FROM SUMP
- CONTAINMENT SUM ARRANGEMENT
- SCREENS
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SAFETY INJECTION SYSTEM DIAGRAM IIJV-1842
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PIPING AND COMPONENTS ELEVATIONS SPRAY SYSTEMS
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!.. I SECTION B-B CONlf'A!NMENT SUMP SCRIEIEN SURRY POWER STATION
UNIT 1 UNIT 2 --
UNIT STATUS REFUELING OUTAGE FORCED MAINTENANCE OUTAGE (RCP REPAIR)
PURPOSE OF TEST NEW.RECIRCULATION LINES HAD BEEN INSTALLED FOR THE INSIDE REC'IRC SPRAY PUMPS DURING THE OUTAGE TO PERMIT FLOW TESTIN \\
QA OBSERVATIONS OF FOREIGN MATEBIAL CONTROL MARCH 1988 MAY 10, 1988
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QA PRE-OUTAGE OBSERVATION PLAN PUBLISHED. INCLUDES MATERIAL CONTRO QA IDENTIFICATION OF CLEANLINESS, MATERIAL AND ACCESS CONTROL ISSUES PRESENTATION TO MANAGEMEN INSUFFICIENT CONTROL OF MATERIAL AND TOOLS DURING MAINTENANCE *
- TRAINING OF CONTRACTORS
- ACCESS CONTROL
- CONTROL OF SYSTEM INTEGRITY DURING MAINTENANCE
- MATERIAL STORAGE CONCERNS
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(PRE-EXISTING) -
- PROCEDURAL CONTROLS
- SUADM-M-02 (PLANT HOUSEKEEP/Nq
- Cleanliness requirements for each plant area
- SUADM-M-03 ( CLEANLINESS CONTROL OF PLANT SYSTEMS AND COMPONENTS)
- Cleanliness and access control for primary system, steam generators, MS piping and FW piping
- WP-M-01 (SHOP FABRICATION AND INSTALLATION OF PIPING SYSTEMS)
- Pipe caps and closures
- WP-G-08 ( CONFINED ENTRY.AND TOOL CONTROQ
- Applicability similar to SUADM-M-03
- PROGRAM WEAKNESSES *
- SOME WORK NOT COVERED BY PROCEDURE
- CONSTRUCTION REQUIREMENTS NOT UNIFORMLY INVOKED
- JUNE 6, 1988 MULTIPLE TEST RUNS OF 1-RS-P-1A CONDUCTE INDICATIONS OF DEGRADED CONDITIO IMMEDIATE PUMP/SUMP INSPECTIONS CONDUCTED.. * DEBRIS FOUND IN
. TEMPORARY DISCHARGE CONE STRAINER, SUMP AND PUM * JUNE 9, 1988 UNIT 2 INSPECTIONS CONDUCTED ADDITIONAL DEBRIS IDENTIFIED IN THE UNIT 2 SUMP. SCREEN DEFICIENCIES ALSO NOTE * CLEANING CONDUCTED. ENGINEERING EVALUATIONS UNDERWA * JUNE 16, 1988
- JUNE 17, 1988
- JULY 6, 1988 NOTIFIED NRC OF POTENTIAL PROBLEM UNIT 2*RECIRC PUMP*TESTED SUCCESSFULLY LER 88-17 ON SUMP DEBRIS SUBMITTED
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- VISUAL INSPECTIONS (INADEQUATE IN THE WELLS)
- FIBER OPTIC INSPECTl*ONS OF WELL & SUCTION LINES
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- AREAS INSPECTED
- SUCTION PIPING INSIDE CONTAINMENT FOR THE INSIDE AND OUTSIDE RECIRC SPRAY PUMPS AND LOW HEAD SAFETY INJECTION PUMPS
- CONTAINMENT SUMPS
- SUMP SCREENS
UNIT 1
- FOREIGN OBJECTS IN INSIDE RS PUMP WELLS (SIMILAR TO MATERIAL TYPES IN TEMPORARY DISCHARGE STRAINER)
- OUTSIDE RS PUMPS AND LHSI PUMP SUCTION LINES WERE CLEAN UNIT2
- FOREIGN OBJECTS LOCATED IN BOTH INSIDE RECIRC SPRAY PUMP WELLS
- FOREIGN OBJECTS IN aoTH LHSI PUMP SUCTION LINES
- OUTSIDE RS PUMP SUCTION LINES CLEAN TYPICAL MATERIALS FOUND: SCREWS, NUTS, PIECES OF METAL, WIRE, VARIOUS NON-METALLICS. ONE ANGLE GRINDER HEAD. ONE TEN INCH WRENC I
UNIT 1 1-RS-P-1A 1-RS-P-18
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1-RS-E-1A 1-RS-E-18 LONG-TERM OPERABILITY COULD NOT BE ESTABLISHED LONG~TERM OPERABILITY COULD NOT BE ESTABLISHED POSSIBLE LONG-TERM *FAILURE SLIGHT REDUCTION IN HEAT TRANSFER CAPABILITY;
- NO POTENTIAL FOR TUBE DAMAG SI-P-1A&1B NO SOLID DEBRIS FOUND 1-RS-P-2A&2B NO SOLID DEBRIS FOUND I
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UNIT2 2-RS-P-1 A& 1 B
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2-RS-P-2A&2B 2-RS-E-1 A& 1 B 2-SI-P-1 A& 1 B
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LONG-TERM OPERABILITY UNAFFECTED BY DEBRIS.
NO SOLID DEBRIS FOUN NO POTENTIAL FOR LONG-TERM TUBE DAMAG LONG-TERM OPERABILITY UNAFFECTED BY DEBRIS...
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SUMP SCREENS
- PROPER INSTALLATION AND MAINTENANCE OF THE SUMP SCREENS IS REQUIRED TO ENSURE THAT RS AND LHSI SYSTEMS ARE AVAILABLE TO MEET THEIR DESIGN BASIS REQUIREMENTS
- SCREEN DEFICIENCIES (E.G., SPACING) LIKELY WOULD NOT HAVE PRECLUDED EFFECTIVE PUMP PERFORMANCE
- INTERMEDIATE SCREEN PROVIDES TRAIN SEPARATION IN THE SUMP
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- IRS PERFORMANCE CONSIDERED IN ACCIDENT ANAL VSES
- LONG-TERM OPERABILITY OF UNIT 1 IRS PUMPS AND HEAT EXCHANGERS NOT ASSURED BECAUSE OF SUMP DEBRI * LHSI AND ORS OPERABILITY NOT AFFECTE '
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- WITHOUT IRS SVTEM AND SINGLE FAILURE OF ORS (ONLY ONE ORS PUMP OPERATING FROM START.OF ACCIDENT):
- CR THYROID DOSE INCREASE LIKELY EXCEEDS GDC-19 LIMITS
- OFFSITE DOSE AND CR WHOLE BODY DOSE DO NOT EXCEED LIMITS
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- SOURCE OF DEBRIS
- IRS - WELLS NOT ROUTINEL V OPENED
- Most likely construction debris from early plant modifications. For example:
- IRS Dewatering System, January 1977
-. RS Net Positive Suction Head Modification, June 1978
- Steam Generator Replacement Program, 1979-80
- Inadequate foreign material exclusion (FME) program was in place for these modifications
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- DEBRIS AND SCREEN GAPS NOT DISCOVERED PREVIOUSL V
- VISUAL INSPECTION OF SUMP NOT ADEQUATE TO OBSERVE ALL POTENTIAL DEBRIS LOCATIONS (WELLS AND SUCTION.PIPING)
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- ABSENCE OF FLOW TESTING (ORIGINAL DESIGN BASIS)
- INADEQUATE SCREEN INSPECTION PROCEDURE
- WEAKNESSES IN RECENT FME PROGRAM IMPLEMENTATION AND DOCUMENTATION
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IMMEDIATE
- NRC NOTIFICATION
- CLEAN PUMPS/SUMPS
- REPAIR/REPLACE; SCREENS. EMPHASIS ON SCREEN INTEGRITY
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UNIT 2 OUTAGE
- DESIGN CHANGE/CONSTRUCTION PROCEDURES UPGRADED
- STANDING MAINTENANCE ORDER ON CLEANLINESS CONTROL IN PLACE i
- TRAINING SESSIONS HELD FOR CONTRACTORS AND MAINTENANCE PERSONNEL
- IMPLEMENT SURVEILLANCE PROGRAM FOR SUMPS AND SCREENS
LONG-TERM
- MAINTENANCE PROCEDURES TO BE UPGRADED AS PART OF PROCEDURE PROGRAM
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- VIRGINIA POWER AWARE OF PROGRAMMATIC WEAKNESSES
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IDENTIFIED.BY INTERNAL PROGRAMS
- AGGRESSIVE CORRECTIVE ACTIONS ARE BEING IMPLEMENTED
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- Cleanliness controls are being enhanced ;
- Actions focus both on precluding entry of debris and doing appropriate inspections
- WORST CASE ANALYSES FOR THE AS-FOUND CONDITION INDICATED OFF-SITE DOSE WITHIN PART 100 LIMITS
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- UNIQUE SYSTEM CONFIGURATION CONTRIBUTED TO PROBLEM
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