ML20134J505
| ML20134J505 | |
| Person / Time | |
|---|---|
| Site: | Quad Cities  |
| Issue date: | 10/30/1996 |
| From: | Kraft E COMMONWEALTH EDISON CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| ESK-96-197, NUDOCS 9611150242 | |
| Download: ML20134J505 (15) | |
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Osmmonweahh Filiv>n Q>mpany Quad Cities Gen (rating Station 22710 206th Avenue North Ostdova, 11.612429740 Tel 309M4 2241 ESK 96-197 October 30,1996 US Nuclear Regulatory Commission Washington, DC 20555 Attention:
Document Control Desk
Subject:
Status of Diagnostic Evaluation Team (DET)
Material Condition Improvements
Reference:
(a) J. O' Conner to J. Taylor letter concerning DET Response dated December 30,1993 The purpose of this letter is to provide detailed information on the progress of material condition improvements described in reference (a).
Our fundamental strategy for accomplishing the planned performance improvements continues to rely on the Course of Action, and the Quad Cities Annual Management Action Plans.
r In summary, of the ninety-four (94) improvements planned, eighty (80) have been addressed. The fourteen (14) remaining items are scheduled for completion and are being tracked by the station.
Among the most important completed corrective actions were:
Resolving High Vibration issues on both High Pressure Coolant Injection Pumps, the 2B Residual Heat Removal Service Water pump (RHRSW), the 2C Residual Heat Removal (RHR) pump, and the 2A Core Spray (CS) pump.
Complete overhaul of the Unit 1/2 Emergency Diesel Generator (EDG) and correcting high vibrations on the 1/2 EDG cooling water pump.
Overhaul of Reserve Auxiliary Transformers TR-11, and TR-12.
Overhaul of the Unit 1 Reactor Core Isolation Cooling turbine, j
h Upgrade of Torus Cooling motor operated valves to alleviate cavitation 130JJg induced vibration.
9611150242 961030 ppR ADOCK 0500 4
P A tinicum o>mpany
l ESK 96-197 Page 2 of 3 October 30,1996 l
The fourteen remaining items are:
The Electromatic Relief Valve replacement is awaiting final resolution of problems encountered with the Power Operated Relief Valves following their installation on Unit 2 during the spring of 1995.
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l Installation and upgrade of local indication for U-1,2, and 1/2 EDGs (three items).
I Permanent repair to eliminate-the furmanite clamp on the 2A Reactor Recirculation Pump flange.
Replacement of the signal cables for the U-2 Source Range Monitors and Intermediate Range Monitors.
Impeller cutwater modifications for the 1B, IC, and 2D RHRSW pumps.
t Replace copper tubing on Unit 1,2 and 1/2 EDGs (three items).
Overhaul of the "A" RHR pump and refurbish the "C" and "D" RHR pump motors (two items).
Perform maintenance on the RHR heat exchangers.
Modification of Reactor Feed Pump low suction trip logic.
I Should you need additional information, please contact Mr. Charles Peterson, Regulatory Affairs Manager, Quad Cities Station, at (309) 654-2241 extension 3602.
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Sincerely, V
M.
j E. S. Kraft, J Site Vice President Quad Cities Station I
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ESK 96-197 Page 3 of 3 October 30,1996 Attachments: (1) Detailed information concerning resolution of DET material improvement items l
cc:
J. Taylor, Executive Director, Operations, NRR W. Beach, Regional Administrator, Region III R. Pulsifer, NRR Project Manager l
C. Miller, Senior NRC Resident, Quad Cities i
F. Spangenberg, Regulatory Affairs Manager, Dresden D. Tubbs, MidAmerican Energy Company R. Singer, MidAmerican Energy Company P. Piet, Licensing Administrator, Downers Grove Document Control Desk - Licensing (both hard and electronic copy)
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A1TACHMENT 1
" RESOLUTION OF DET MATERIAL IMPROVEMENT ITEMS" j-(Page 1 of 12) i Emergency Diesel Generator (EDG) l Unit 1 l
l replacement of the lube oil cooler (cooler previously replaced for other EDGs)
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l STATUS:
Completed installation and upgrade of local indication l
STATUS:
Approved by technical review board (TRB) on 5/9/96} NTS # 254-123-96-1301 upgrade of air starting skid through the installation of a moisture separator and the replacement of the existing copper tubing with stainless steel i
STATUS:
Cancelled - the purpose of this project was to replace obsolete instrumentation, l
relocate copper lines with stainless steel piping, and although the air receiver tanks are acceptable, they also were to be replaced. As engineering progressed the i
l most cost beneficial and available power source needed was a safety related mec.
This additional load on the bus was not justifiable. The alternate power supply l
became cost prohibitive, and the project was cancelled. However, the obsolete instrumentation has been replaced and plans are in progress to replace the copper tubing. NTS # 254-123-96-01302.
Unit 2 l'
installation and upgrade of local indication i
STATUS:
Placed into 1996 map (focus area 1, objective "D", step 1) { approved by TRB on 5/9/96} NTS # 254-123-96-01301.
upgrade of air starting skid through the installation of a moisture separator and the replacement of the existing copper tubing with stainless steel STATUS:
Cancelled - the purpose of this project was to replace obsolete instrumentation, relocate copper lines with stainless steel piping, and although the air receiver tanks are acceptable, they also were to be replaced. As engineering progressed the most cost beneficial and available power source needed was a safety related mcc.
This additional load on the bus was not justifiable. The alternate power supply became cost prohibitive, and the project was cancelled. However, the obsolete instrumentation has been replaced and plans are in progress to replace the copper tubing. NTS 254-123-96 01302.
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ATTACHMENT 1
' RESOLUTION OF DET MATERIAL IMPROVEMENT ITEMS" (Page 2 of 12)
High Pressure Coolant Injection (HPCI) l l
Unit 1 completion of turbine exhaust line sparger modification l
STATUS:
Completed i
i cutwater modification on booster pump STATUS:
Cancelled, diagnostic testing was performed which determined the motor was acceptable. Station will continue to monitor with diagnostic testing.
steam line drain modification STATUS:
Completed trim upgrade on motor operated valve 2301-46 (cooling water pressure control valve) to alleviate cavitation induced vibration l-STATUS:
Completed i
overhaul emergency oil pump (balance pump impeller and motor rotor)
STATUS:
Completed
" cold" alignment check on turbine-pump STATUS:
Cancelled: a review of the vibrations on the Unit-1 HPCI pump / turbine combination for the last 30 months show that all vibration points which are monitored have always been below the alert range and in most cases have been trending down. Therefore the system and component engineers determined that a cold alignment should not be performed until maintenance is performed that would require a re-alignment.
Unit 2 l
completion of turbine exhaust line sparger modification STATUS:
Completed 1
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ATTACHMENT 1
' RESOLUTION OF DET MATERIAL IMPROVEMENT ITEMS" 4
(Page 3 of 12) cutwater modification on booster pump STATUS:
Cancelled, diagnostic testing was performed which determined the motor was acceptable, the vibration data showed that pipe strain and turbine / pump alignment were the major contributors, thereby eliminating the need for the modification. The station during 02R13 reconditioned the pump base, eliminated pipe strain, and aligned the turbine / pump. Station will continue to monitor with diagnostic testing.
overhaul emergency oil pump (balance pump impeller and motor rotor) i STATUS:
Cancelled, diagnostic testing was performed which determined the vibration was acceptable. Station will continue to monitor with diagnostic testing.
" hot" alignment check / study on turbine-pump following unit startup (permalign study)
STATUS:
Completed Reactor Core Isolation Cooling (RCIC)
Unit 1 turbme overhaul STATUS:
Completed upgrade of turbine exhaust line rupture disc design STATUS:
Completed Core Spray (CS)
Unit 1 overhaul "A' Pump STATUS:
Completed motor refurbishment for the "A" Pump STATUS:
Completed
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l ATI'ACHMENT 1 l
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' RESOLUTION OF DET MATERIAL IMPROVEMENT ITEMS" (Page 4 of 12) balance motor-pump coupling for "A" Pump
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l STATUS:
Completed trim upgrade of motor operated valves 1402-4A&B (torus test return) and rernoval of l
downstream restricting orifices in order to alleviate cavitation induced vibration.
l Conversion of testable check valves 1402-9A&B to conventional swing check design - to alleviate pneumatic actuator concerns i
STATUS:
Completed Unit 2 motor refurbishment for the "A" Pump i
STATUS:
Completed l
balance motor-pump coupling for "A" Pump STATUS:
Completed trim upgrade of motor operated valves 1402-4A&B (torus test return) and removal of downstream restricting orifices to alleviate cavitation induced vibration 1
STATUS:
Completed conversion of testable check valve 1402-9A to conventional swing check design to alleviate pneumatic actuator concerns STATUS:
Completed Residual Heat Removal (RHR) and RHR Service Water (RHRSW)
Unit 1 l
overhaul "A" RHR Pump l
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Work is scheduled to be completed. WR # 930064455.
motor refurbishment for the "C" and "D" RHR Pumps STATUS:
Work is scheduled to be completed. WR #'s: 930065228 and 940101916, t
ATTACHMENT 1
" RESOLUTION OF DET MATERIAL IMPROVEMENT ITEMS" (Page 5 of 12) motor refurbishment for the "B" and "C" RHRSW Pumps
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STATUS:
Completed RHR heat exchanger maintenance activities STATUS:
Work is scheduled to be completed WR # 950086109.
trim upgrade of motor operated valves 1001-5 A&B (heat exchanger service water outlet) and removal of downstream restricting orifices to alleviate cavitation induced vibration STATUS:
Completed l
l trim upgrade of motor operated 1001-36 A&B (torus cooling) to alleviate cavitation induced vibration t
STATUS:
Completed replacement of the 1001-29B (LPCI injection) valve stem to a higher strength material STATUS:
Completed Unit 2 overhaul"C" RHR Pump j
STATUS:
Completed motor refurbishment for the "B" and "C" RHR Pumps STATUS:
Completed motor refurbishment for the "B" and "C" RHRSW Pumps STATUS:
Completed l
trim upgrade of motor operated valves 1001-5 A&B (heat exchanger service water outlet) and removal of downstream restricting orifices to alleviate cavitation induced vibration STATUS:
Completed
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ATTACHMENT 1 l
" RESOLUTION OF DET MATERIAL IMPROVEMENT ITEMS" (Page 6 of 12) i trim upgrade of motor operated 1001-36 A&B (torus cooling) to alleviate cavitation induced vibration i
STATUS:
Completed i
Other Activities Unit 1 i
torus reccat i
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Completed motor refurbishment of the Reactor Recirculation Pumps STATUS:
Cancelle.d, diagnostic testing was performed in 01R13 which determined the motors were acceptable. Station will continue to monitor with diagnostic testing.
motor refurbishment of the "C" and "D" Condensate / Condensate Booster Pumps STATUS:
Completed overhaul "D" Condensate / Condensate Booster Pump STATUS:
Completed Unit Aux Transformer (TR-11) overhaul STATUS:
Completed MOV dP testing STATUS:
Completed upgrade outboard MSIV air lines (from copper to stainless steel piping)
STATUS:
Cancelled: This item was reviewed by both the Site Planning Group (SPG) and Technical Review Board (TRB) and found not to be required (no safety implication), and that the modification would be only an enhancement to minimize the potential for damage during outage periods.
l ATTACHMENT 1
" RESOLUTION OF DET MATERIAL IMPROVEMENT ITEMS" (Page 7 of 12)
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rebuild / replace the discharge accumulator for each Standby Liquid Control (SBLC) l pump STATUS:
Completed new/ revised MSL support arrangements (as required)
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STNfUS:
Completed j
Electromatic Relief Valve (ERV) replacement to be scheduled for OlR14 STATUS:
ERV Replacement is being delayed. The station is awaiting final resolution of PORV problems. The PORV's were installed on Unit 2 during 02R13.
staking of main condenser tubes to alleviate vibration STATUS:
Completed overhaul low pressure turbine "B" l
STATUS:
Completed i
replace main condenser section "A" boot i
STATUS:
Completed i
4kV Bus 14 breaker replacement 1
STATUS:
Completed l
installation of time delay relays in the MSL low pressure circuitry - to alleviate Group 1 isolation concerns following scrams l
STATUS:
Completed
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replacement of the signal cables (triple shielded cables) and drive cables for the SRMs l
l and IRMs l
STATUS:
Completed i
installation of varistors in 250 Vdc motors for selected HPCI, RCIC, and RHR valves l
STATUS:
Completed
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A'ITACHMENT 1
" RESOLUTION OF DET MATERIAL IMPROVEMENT ITEMS" (Page 8 of 12) installation of test taps far the RHR testable check valves 68 A&B - performance of the pressure test on the check valves (68 A&B)
STATUS:
Completed main generator rotor overhaul STATUS:
Completed modification of RFP low suction trip logic to "two-out-of-two" with time delay STATUS:
Work is scheduled to be completed. MOD M04-1-93-006.
upgrade of "A" and "B" Feedwater regulating valves (FRVS) to new hydraulic actuator design (note "A" FRV is being converted from an air actuator design)
STATUS:
Work completed, awaiting testing.
inspection of the following room coolers: "A" & "B" Core Spray, "A" & "B" RHR, HPCI, and "A" & "B" RHRSW Pumps STATUS:
Ccmpleted disassembly and repair of the " disk / pilot assembly" for the MSIVs STATUS:
The remaining Unit 1 MSIV will be completed when the valve is required to be disassembled.
Unit 2 motor refurbishment for the Reactor Recirculation Pumps STATUS:
Cancelled, diagnostic testing was performed which determined the motors were acceptable. The station will continue to monitor with diagnostic testing.
motor refurbishment for the "C" and "D" Condensate / Condensate Booster Pumps STATUS:
Completed
ATTACHMENT 1
" RESOLUTION OF DET MATERIAL IMPROVEMENT ITEMS" (Page 9 of 12) i Unit Aux Transformer (TR-21) overhaul STATUS:
Completed MOV dP testing STATUS:
Completed new/ revised MSL support arrangements (as required) and ERV replacement STATUS:
Completed i
permanent repair to eliminate furmanite clamp on "A" Reactor Recirculation Pump flange STATUS:
Planned for next outage (02R14) tracked under NTS # 254-123-96-00302 rebuild / replace the discharge accumulator for each SBLC pump STATUS:
Completed 4kV Bus 23 breaker replacement STATUS:
Completed reactor vessel feedwater nozzle inspection STATUS:
Completed RWCU return piping (outboard piping) replacement STATUS:
Completed installation of time delay relays in the MSL low pressure circuitry - to alleviate Group 1 isolation concerns following scrams j
STATUS:
Completed replacement of the signal cables (triple shielded cables)and drive cables for the SRMs and
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IRMs STATUS:
Drive cables replaced, signal cables will be replaced during 02R14 (NTS # 254-123-96-01310)
ATTACHMENT 1
" RESOLUTION OF DET MATERIAL IMPROVEMENT ITEMS" (Page 10 of 12) i 4
upgrade of "A" and "B" Feedwater regulating valves (FRVS) to new hydraulic actuator design (note "A" FRV is being converted from an air actuator design)
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STATUS:
Completed inspection of the following room coolers: "A" & "B" Core Spray, "A" & "B" RHR, HPCI, and "A" & "B" RHRSW Pumps STATUS:
Completed disassembly and repair of the " disk / pilot assembly" for MSIVs "2B", and "2D" STATUS:
Unit 2 completed Additional Activities planned in 1993/1994:
Unit 1/2 (Swing) Emergency Diesel Generator (during '94) replacement of all 20 EDG engine power packs STATUS:
Completed installation of field ground indication modification (installation of time delay)
STATUS:
Completed installation of modification on EDG fuel oil system to allow for flexible hose installation STATUS:
Completed installation and upgrade of local indication - includes installation of new digital tachometer STATUS:
Engineering is evaluating a modified design. This will be tracked by NTS # 254-123-96-01303.
inspection of current transformers in local diesel generator panels STATUS:
Completed I
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l ATTACHMENT 1
RESOLUTION OF DET MATERIAL IMPROVEMENT ITEMS" (Page 11 of 12) l upgrade of air starting skid through the installation of a moisture separator and the replacement of the existing copper tubing with stainless steel STATUS:
Cancelled - the purpose of this project was to replace obsolete instrumentation, relocate copper lines with stainless steel piping, and although the air receiver tanks are acceptable, they also were to be replaced. As engineering progressed the most cost beneficial and available power source needed was a safety related mcc. This additional load on the bus was not justifiable. The alternate power supply became cost prohibitive, and the project was cancelled. However, the obsolete instrumentation has been replaced and plans are in progress to replace the copper tubing. NTS # 254-123-96-01302.
Impeller /Cutwater Modification on the RHRSW Pumps modifications completed on "lA", "lD", and "2C" pumps STATUS:
Completed modifications to be comp'ewd on "lB", "lC", "2A", "2B", and "2D" pumps during '94 STATUS:
"2A" and "21f completed, "1B", "1C", AND "2D" are being done in 1996 and tracked under NTS # 254-200-87 04000R1.3 Operator Work-Arounds/ Concerns 48 issues identified by operators STATUS:
Completed 21 issues will be resolved (e.g., Service Water Radiation Monitors) by the completion of 02M11 STATUS:
Completed an additional 26 issues are planned to be resolved by the end of '94 STATUS:
Completed The remaining issue is planned to be resolved dur ag '95 STATUS:
Completed
ATI'ACHMENT I
' RESOLUTION OF DET MATERIAL IMPROVEMENT ITEMS" (Page 12 of 12)
Vulnerability Assessment Issues approximately 25% of the VAT issues will be resolved by the completion of 02M11 STATUS:
Completed
- approximately 80% (total) of the VAT issues are planned to be resolved by the end of '94 STATUS:
Completed Motor Operated Valve (MOV) Differential Pressure Testing through '93,36 MOVs (25 high priority MOVS) have been dP tested - 28 of these MOVs (20 high priority) have been performed since August of '93 STATUS:
Completed MOV dP testing scheduled to be completed by the end of '94 STATUS:
Completed Material Condition Unit 1 RHRSW Vaults upgrade scheduled to be completed by the end of the first quarter of
'94 STATUS:
Completed Unit 2 RHRSW Vaults upgrade scheduled to be complete.4 by the end of the second quarter of
'94 i
STATUS:
Completed Area reclamation initiative - schedule established and initiative is being implemented j
STATUS:
Completed
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