ML20214T428
| ML20214T428 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 09/19/1986 |
| From: | Bailey J GEORGIA POWER CO. |
| To: | Youngblood B Office of Nuclear Reactor Regulation |
| References | |
| 0725V, 725V, GN-1080, NUDOCS 8609300294 | |
| Download: ML20214T428 (18) | |
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Georgia R7wer Company Pbst Office Ekm 282 Waynesborn Georgia 30830 Telephone 404 554-9961 404 724-8114 Southern Company Services, Inc.
Pbst Office Box 2625 Birmingham, Alabama 35202 Telephone 205 870-6011 September 19, 1986 Director of Nuclear Reactor Regulation File X4AK01 Attention:
B. J. Youngblood X4BA17 Licensing Branch #4 Log:
GN-1080 Division of Licensing U. S. Nuclear Regulatory Commission Washington, D.C.
20555 NRC DOCKET NUMBERS 50-424 AND 50-425 CONSTRUCTION PERMIT NUMBERS CPPR-108 AND CPPR-109 V0GTLE ELECTRIC GENERATING PIANT - UNITS 1 AND 2 DESIGN REVIEW / QUALITY REVALIDATION REPORT TDI DIESEL CENERATORS
Dear Mr. Denton:
As requested by your staff we have reviewed the SER dated August 8, 1986 concerning reliability of TDI Diesel Generators at VEGP. In response to the SER Georgia Power Company provides the following attachments: : DR/QR Report Clarification : Maintenance / Surveillance Program
- Board Notices and LERs : Justifications for Deviation from SER i'
Should you require additional information, please do not hesitate to call.
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Sincerely,
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i J. A. Bailey Project Licensing Manager i
JAB /sm xc: List attached.
8609300294 860919 PDR ADOCK 05000424
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O Director of Nuclear Reactor Regulation File: X4AK01 September 19, 1986 XBA17 Page 2 Log:
GN-1080 xc:
R. E. Conway R. A. Thomas B. W. Churchill, Esquire J. E. Joiner, Esquire M. A. Miller L. T. Gucwn G. Bockhold, Jr.
B. Jones, Esquire
- 0. Batus D. Feig NRC Regional Administrator NRC Resident inspector 0725V 4
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ATTACISENT 1 C(WONENT #
DR/QR 1IFLEIENTED DESCRIPTION REQUIREIENT YES/NO C(NGENTS MP-022/23 Turbocharger Implement SIM 300 NO N/A - VEGP has a plate welded in this area Full flow prelubrication YES modification Drip system flow rate YES Inspect thrust bearing NO To be implemented after 100 engine starts or at the closest plant refueling outage but not to exceed 130 starts.
Forecast to to reach 100 starts prior to fuel load.
Rotor axial clearance YES Maintenance procedure addresses how to measure. Per the maint/surv (M/S) matrix this will be measured at each E0C.
Thrust bearing inspection after N0 Vogtle will perform this inspection as 40 non-prelubed automatic fast recommended in the DR/QR. Procedures will starts reflect this prior to fuel load.
Perform liquid penetrant test on NO To be impelemented after 100 engine starts the stationary nozzle ring Perform visual inspection YES Right bank turbocharger thrust bearing was of bearings and nozzle ring replaced. Left bank turbocharger thrust bearing was determined to be acceptable 02-375 VT intake manifold flange surfaces YES Intake Manifold for cracks Proper installation of intake YES One intake manifold elbow replaced on manifold elbows engine 1.
Flange mating surfaces on all elbows (both engines) were inspected and stoned smooth as necessary.
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ATTACISENT 1 Page 2 of 6 C0fr0NENTf DR/QR IfrLEE NTED DESCRIPTION REQUIREENTS YES/ND CWWENTS 02-380A Replace slip joints NO Justification - Owners Group Letter MTS-Exhaust Manifold 4086 dated 11/05/85. See Attachrent 4.
02-3808 Perform dimensional check of YES Description capscrews Verify proper gasket material YES and bolting Verify no binding and no cracks YES 02-475B Locking devices or valve linkage NO Rev 2 of M/S matrix requires verification Air Butterfly verified monthly at each E0C Valve Modification to add grease N/A VEGP engines were manufactured with grease fittings fittings - no modification required VT of butterfly shaft attachment YES pins VT at shaft for wear and distress YES Verify butterfly valve properly YES installed 02-305A Liquid Penetrar.t tests on bearing' YES Engine 1 - A linear indication was Base Assembly saddles identified on the No. 8 bearing cap mating surface using a liquid penetrant test. An engineering review of the indication showed that it was in a no load area.
Engine 2 - A linear indication was identified on the No. I bearing cap mating surface using a liquid penetrant test. An eddy current test on the indication-showed it to be a scratch, not a crack.
02-310A Perform torsiograph tests NO Scheduled to be performed prior to Crankshaft fuel load Eddy current test on main journal YES oil holes Nos. 4, 6, and 8.
ATTACMENT 1 Page 3 of 6 C(W ONENT i DR/QR IIFELEENTED DESCRIPfION REQUIREENTS YES/NO COMENTS02-359 VT to verify adequate seating YES Air Start Valve exists VT to verify no carbon deposits YES Verify initial and hot torque YES valves Dimensional check of capscrews YES Material comparator test on YES capscrews Verify proper gasket material YES 02-0442A Verify correct timing N0 Vogtle will implement the DR/QR Stcrting Air
' recommendations prior to fuel load.
Distributor Verify installation of follower N0 Vogtle will implement the DR/QR lobe on camshaft recommendations prior to fuel load 02-340A VT to connecting rod bolt washers YES Engine 1 - Galling was noted on several Connecting for signs of galling bolts, nuts and washers. The washers Rods were replaced and the nuts and bolts machined to specifications given in SIM 332.
Engine 2 - No galling on the contact surfaces were noted.
Liquid Penetrant test on wrist pin YES Engine 1 - Indication were noted on the bushings wrist pin bushings. As engineering evaluation determed the indication to be irrelevant.
No indications were noted within 15 of bottom dead center.
VT of rack teeth YES Engine 2 - Indications were noted on four wrist pin bushing. An engineering evaluation Clearance check of link rods and YES determined the indication to be irrelevant.
link pens No indications were noted within 15* of bottom dead " center."
Verify proper fit-up of serrated YES edge
ATTACHNENT 1 Page 4 cf 6 C(NFONENT DR/QR IfFLEENTED DESCRIPTION REQUIREENT YES/NO C0fGENTS 02-3408 VT of bearing shells YES Connecting Rod Brg. Shells Radiographic inspection YES Engine 1 - One bearing shell was rejected of bearing shells and one bearing shell was restricted to
" bottom" use only.
l Engine 2 One bearing shell was rejected and one bearing shell was restricted to
" bottom" use only.
t 02-350C Verify proper torque valves YES j
Idler Gear applied to bolts 1
Assembly 02-362A VT of web area for cracking YES Engine 1 - Two subcovers had visual i
Subcover indications and were replaced.
Engine 2 - Two subcovers had visual
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indications, one was replaced. An engineering evaluation determined the the other subcover to be acceptable.
Liquid Penetrant test of YES Engine 1 - Four subcovers had indications.
j subcovers An engineering evaluation determined the subcovers to be acceptable.
Engine 2 - Two subcovers had indications.
An engineering evaluation determined i
the subcovers to acceptable.
02-390C 3D Liquid Penetrant test on YES Pushrods pushrods i
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ATTAC!9ENT 1 P;ge 5 cf 6 COWOMENT DR/QR IWLEENTED DESCRIPTION REQUIREENT YES/NO C0f0ENTS 02-390G Verify no movement in rocker YES I
Rocker Arms arins drive studs and Pushrods Magnetic particle test on Engine 1 - Tliree capscrews had linear thread root area of capscrews indications. in the thread root area and were replaced.
Engine 2 - Three capscrews had linear indications in the thread root area and were replaced.
02-410B Dimensional inspection of shaft YES Overspeed to bearing clearance Trip Liquid Penetrant on governor (ES Shaft Dimensional check of governor YES shaft 1
02-411A Liquid Penetrant on governor YES Governor drive gear and shaft Drive 02-413A Verify roll pins installed to YES Governor Linkage hold fuel control levers to cross shaft 02-425 Replace wear rings and impeller YES Engine 1 - Impeller and wear rings Jacket Water were replaced.
Pump Engine 2 - Impeller and wear rings were replaced.
VT of pump shaft YES V7 of pump driver gear YES VT of wear ring YES 1
ATTACHEENT 1 Page 6 Cf 6 COWONENT DR/QR IBFLEENTED DESCRIPTION REQUIREENT YES/NO COMENTS 02-360A VT of cylinder heads YES Engine 1 - One cylinder head had galling Cylinder Head around a stud hole and two cylinder heads had gouges. All were stoned smooth and determined to be acceptable for use.
Engine 2 - no indications noted.
02-360B VT to verify adequate valve YES Intake / Exhaust seating.
Valves VT of valve and valve ring YES VT of top of valve stems at YES l
the rocker arm contact area 02-365C Inspect compression fittings at N0 The Maintenance / Surveillance matrix, i
Fuel Injection both ends of each fuel revision 2 does not recommend this inspecticn s Equipment injection line monthly.
VT of fuel injection equipment YES for leakage 02-455C VT the as-installed condition N0 Vogtle will perform this inspection i
Fuel Oil Filters of the mounting hardware prior to fuel load.
and Strainers 4
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ATTACMT 2 C00FONENT PM DESCRIPTION REC 0fGENDATION FREQUENCY C0fGENTS 02-425A Castle nut minimua and maximum
- Torque' values will be checked each time Jacket Water torque values pump is disassembled Pump Gear CP-102 Check meter calibrations E0C Generator Control Panel 02-371A Check and Lubricate Monthly Fuel Pump l
Centrol Shaft j
01-413A Install locking hardware to the
- Frequency will be based on the results Gc iarnor lever arm clamp bolt heads of the monthly inspection for loose Liikage and shaft roll pins parts on the linkage assembly I
Lubricate cross sh.ft bearings Monthly 02-475A, C Inspect bracket bolting E0C Turbocharger Bracket Bolting 02-500C Trip check circuit breakers 5 Yr.
Circuit Breakers i
l 02-525B Replace control valve "0" rings and 5 Yr.
Bearing Device lube shaft Replace press regulator elastomeric-N/A VEGP has no press regulator parts i
Replace filter element EOC Drain bearing device air filter Monthly i
ATTACHENT 2 Page 2 Cf' 3 COWONENT #
.PM DESCRIPTION REQUIREDENT FREQUENCY C0fGENTS 02-540A Visually inspect sump tank level E0C Lube Oil switch floats. Check switch set Sump Tank points i
02-695C Check switch setpoints E0C Engine Control Pneumatic Trip Replace elastomeric parts 5 Yr.
Switcnes 02-700B Replace elastomeric parts in 5 yr.
Jacket Water valves Stand Pipe OE-810E Check calibration and inspect Alt. EOC Jacket Water thermostat Heaters 02-820A Check calibration and inspect Alt. EOC j
Lube Oil Sump condition of thermostat Tank Heaters 1
02-820F Lube oil filter gauge - calibration Alt. E0C Full Flow Lube check 011 Filters 02-820H Lube oil strainer pressure gauge -
Alt. E0C Full Press Lube calibration check i
Oil Strainer I
02-835J Starting air tank press gauges -
Alt. E0C j
Starting Air calibration check Storagc Tank Starting air tank press switches -
Alt. FOC calibration check 02-315A Perform inspections per DR/QR E0C*
- A review will be performed of the hours Cylinder Block Report 02-315A logged on the engine sinca the last inspection.
Inspection will be performed at the E0C folicwing 490 hours0.00567 days <br />0.136 hours <br />8.101852e-4 weeks <br />1.86445e-4 months <br /> from the the previous inspection
ATTACEENT 2 Page 3 cf 3 V0GTLE COWONENT DESCRIPTION COWONENT INSWER COBOENTS i
Barring Device Air Filter 02-525B Barring Device Control 02-525B Valve and Press Regualtor Crankcase Vacuum Fan 02-387A Flywheel Bolting N/A Matrix does not require maintenance on Vogtle. engine Gear Train N/A Matrix does not require maintenance on Vogtle engine Hydraulic Yalve Lifters N/A Vogtle does not have hydraulic valve lifters Lube Oil Keep-Warm SE-031 Strainer
ATTACH 4ENT 3 SPEC'FIC TDI ISSUE V0GTLE RESPONSE A.
10CFR21 notification on Intake and Vogtle has realaced all Betts valve springs (white stripe) with valve Exhaust Valve Springs springs with.in orange stipe on Unit 1 engines.
B.
Inadequate procedure for Venting of Design changes on the pneumatic shutdown devices have the Governor Lube Oil System been in:plemented. This increased the response time from 3-4 seconds to less than I second. TDI Instructions will be incorporated into the Vogtle procedures for venting the governor by Nov.1,1986.
C.
May 1, 1986 Report on Leaking Fuel Vogtle will follow the Owners Group recommanded maintenance program:
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Eductor (1) Perfonn visual inspection for leaks hourly during engine operation (2) Perfonn viusal inspection for leaks daily during engine standby.
D.
May 7, 1986 Report on Faulty Governor Vogtle will fallow the Owners Group recommended maintenance Booster Cylinder program for t1e governor booster servomotor
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Hay 18, 1986 Report on Stuck Relays Vogtle will c1eck the switch setpoints at each EOC and replace in DG Pneumatic Control Logic System elastomeric p:rts every 5 years.
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May 19, 1986 letter on Design-Vogtle will n)t make the design modification recommended by the I
Modification Owners Group for the exhaust manifold piping, large bore (P/N 02-380A)
Justification is provided in Attachment 4.
The modification on the jacket water discharge manifold (P/N 02-317A & B) and the lube oil piping, large bore (P/N 02-465A) were not recommended in the Vogtle DR/QR report.
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ATTACHNENT 4
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DUKE POWER COMPANY P. O. 8 0 2 3 318 9 OENERAL OFFICES
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3,s 422 SOUTH CHURCN STRtti CHARLOTTE. N. C. 28242 November 5,1985 Mr 0 Batum, General Manager Engineering Department Georgia Powcr Company Route 2, Box 299A Waynesboro, GA 30830 Re: Management and Technical Services TDI Diesel Generator Owners Group Vogtle Electric Generating Plant - Unit 1 Exhaust Manifold Piping Supplemental Report, Revision 1 File: MTS-4086
Dear Mr Batum:
Attached please find one copy of Supplemental Report No.1, Rev.1, for Component 02-380A. This revision adds References 3 and 4.
If you have any quc; tion:; er require additional information, please contact S E Eckert at 704-373-3818.
Very truly yours, A P Cobb, Jr, Manager Project Management Division y: AM grest Sen or Engineer AMS/SEE/gla/E10-22/2 cc: C L Ray (w/o attach) 8 DUKE MANAGEMENT AND POWER TECHNICALSERVICES
SUPPLEMENT 1 TDI OWNERS GROUP V0GTLE ELECTRIC GENERATING PLANT - UNIT 1
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REVISION 1 I
Exhaust Manifold Piping (Large Bore Scope Only)
Component Part No. 02-380A Performed By:
Duke Power Company Management and Technical Services October 31, 1985
SUPPLEMENT 1 j
TDI OWNERS GROUP j
V0GTLE ELECTRIC GENERATING PLANT - UNIT 1 Revision 1 Exhaust Manifold Piping (Large Bore Scope Only)
Component Part No. 02-380A l
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INTRODUCTION The purpose of this supplement is to summarize the evaluation performed to justify eliminating the recommended modifications as stated in the original report.
The exhaust manifold piping contains a sliding span of pipe with a slip joint at each end. These slip joints allow movement along the pipe axis. As stated in the original calculation (Reference No.1), in a linear elastic analysis using simplified boundary conditions, this type of component is unstable. Therefore, the original report recomended replacing one slip joint at the end of the sliding spans with a slip-on flange in order to analyze the manifold using nonnal linear elastic analysis methods. The present exhaust manifold was not shown to be i
deficient in the original analysis, i
II. METHODOLOGY j
The effects of dead weight loads and thermal movements on the sliding I
span of pipe were evaluated using conventional techniques (Reference No.
i 2). 'To account for the seismic loading, several bounding cases were evaluated.
These cases were developed using the sections of pipe connecting to each end of the sliding span. Each section was analyzed with and without the weight of sliding span lumped at the end (see Figures 1 and 2).
It is expected that friction from the seals in the slip joints will i
provide sufficient force (approximately 142 lb.) to move the sliding span along with the adjoining pipe during a seismic event while allowing relative thennal movements. The seismic displacements and rotations at the slip joint are negligible (displacements'approximately.1 inches, rotations approximately.015 radians). Even if the friction force is inadequate to keep the sliding span moving with the adjoining pipe sections, restraining devices are provided to prevent separation of exhaust piping. The gap associated with the slip joint at both normal operating and ambient temperatures is much larger than the total relative movements of the adjacent piping. Therefore, no significant impact between the sliding span and adjacent piping will occur.
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III. RESULTS AND CONCLUSIONS Based on this evaluation (Reference No. 2), the exhaust manifold piping has been found to be acceptable without modification. All stress levels remain well below code allowables (maximum stress ratio of approximately 0.4). Nozzle loads are not significantly increased from those approved in the original calculation. Relative movements at the slip joints are very small and the restraining devices are adequate to prevent any lock up or separation of the exhaust piping.
The exhaust manifold piping as designed and installed by Transamerica Delaval, Inc. is adequate to perform its intended design function.
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l FIGURE 1 EXHAUST MANIFOLD PIPING SLIP s0 INT SLIP JOINTS 9
TURBO-CHARGER I
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CYLINDER CONN F?GURE 2 SLIP JOIN' CONFIGURATION CAPSCREW l
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IV. REFERENCES 1.
" Supporting Calculations for the Evaluation of Comanche Peak Diesel Generator Large Diameter Piping and Supports," Impell Report No.
02-0630-1230, Rev. O, August, 1984 Calculation No. CP-EM-001.
2.
" Qualification of the Diesel Generator Exhaust Manifold Assembly,"
Duke Power Company, Calculation No. CNC-1206.02-50-0001, Rev. O.
3.
" Supporting Calculations for the Evaluation of Catawba Generator Skid Mounted Large Diameter Piping and Supports," Impell Report No. 02-0630-1251, Rev. O, September,1984. Calculation No.
CA-EM-001.
4.
" Supporting Calculations for the Evaluation of Vogtle Generttor 1
Skid Mounted Large Diameter Piping and Supports," Impell Report No.
02-0630-1301, Rev. O, December, 1984. Calculation No. V0-EM-001.
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