ML20138C199
| ML20138C199 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 12/09/1985 |
| From: | Youngblood B Office of Nuclear Reactor Regulation |
| To: | Tucker H DUKE POWER CO. |
| References | |
| NUDOCS 8512120496 | |
| Download: ML20138C199 (7) | |
Text
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Docket No.: 50-414 DEC 0 91985 Mr. H. B. Tucker, Vice President Nuclear Production Department Duke Power Company 422 South Church Street Charlotte, North Carolina 28242
Dear Mr. Tucker:
Subject:
Request for Additional Information Regarding Catawba Unit 2 TDI Diesel Generators The NRC staff has reviewed your submittals dated April 30, 1985, June 21, 1985, and October 2, 1985, regarding the Catawba Unit 2 TDI diesel generators. We find that additional information, identified in the enclosure, is needed for completion of our review.
Please provide the additional information requested in the enclosure as soon as possible. Should you have questions regarding this matter, please contact the Project Manager, Kahtan Jabbour, at 301-492-9789. The comments contained in the enclosure were discussed by telephone with your staff on November _26,1985.
The reporting and/or recordkeeping requirements contained in this letter affect fewer than ten respondents; therefore, OMB clearance is not required under P.L.96-511.
Sincerely, lS I B. J. Youngblood, Director PWR Project Directorate #4 Division of PWR Licensing-A
Enclosure:
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r INFORMATION REQUEST CONCERNING TDI EDGS AT CATAWBA UNIT 2 i
l.
How many hours have been accumulated to date on each engine.(2A and 28) a)
prior to DRQR inspections?
b) total to date?
Please breakdown operating hours according to engine load.
2.
Submit computer listing of all Owners Group recommendations pertaining to Quality Revalidation inspections and component modifications and status and schedule for implementation.
Any items which Duke is not planning to implement should be clearly identified and justification provided.
3.
Submit inspection report for engine 2B 4.
Check and verify that crankshaft torsional systems, including flywheels and generators, are identical between the Unit 1 and Unit 2 engines.
5.
Provide full details of circumstances of recent main bearing failure of Unit 2B engine, including:
a)
Description of inspections performed to detennine extent of damage and the results of the inspections, b)
Failure cause evaluation and assessment; please include FaAA report.
c)
Results of oil analyses perfonned prior to the failure.
Are results consistent with conclusions drawn regarding cause of failure?
d)
Describe actions taken in response to TDI Part 21 notification regarding loose crankshaft oil-way plugs.
Have all oil-way plugs been verified to be in place in the Unit 2B engine? Were the oil-way plugs checked following the main bearing failure?
6.
Verify that each of the actions below have been completed for both Unit 2 engines in accordance with the Owners Group i
recommendations.
(These represent a small subset of all Owners Group reconnendations; however, the staff was unable to confinn that these actions have been completed based on available information. Except as noted below, no exceptions had been taken I
to these actions by Duke in its letter dated June 21,1985).
l For items not implemented, appropriate justification should be provided.
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s A.
Air Start Valve Capscrews (1)
Implement SIM-360 (2) Torque check of all capscrews (hot and cold)
(3) Dimensional inspection of all capscrews
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B.
Electric Cable:
(1) Replacement of 14 AWG wire with wire qualified to IEEE-383-1974 F
C.
Connecting Rods (1) Measure con rod bow (all Conrods) against Owners Group acceptance criteria.
(2) Material and Hardness Check (Sample basis)
(3) Verify that con rod bolt elongations were measured to be consistent with TDI torquing recomendation (all bolts) t (4) Verify that acceptance criteria of zero was applied to link rod to link pin clearance measurement D.
Con Rod Bearings, (1) Dimensional inspection of all shells E.
Crankshafts (1) Verify that material certification reports for EDG 2A and 2B crankshafts have been reviewed for adequacy (2) Check and verify that torsional systems, including 9enerators and flywheels, are identical between Catawba Unit I and Unit 2 engines.
e F.
Engine Block
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(1)" Verify that both the right and left bank blocks of both UnitEngines were checked for acceptable microstructure.
(2) Do block and liner dimentions meet the latest criteria specified by TDI and the Owners Group (includingthe21/2millimitonliner" proudness")?
i G.
Cylinder Heads
?
(1) LP (and/or MT) and UT inspection of all cylinder l
heads pursuant to Owners Group recomendations t
H.
Cylinder Head Studs l
(1) All cylinder head studs checked for proper torque (2) Verify that torque procedures reflect Owners Group letter dated July 3,1984 (See DRQR report for Unit 1)
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(3) Materialandhardnesscheck(samplebasis) i 3
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Engine Base and Bearing Caps 3
(1) Have engine bases been verified to be normal clasrs 40 grey iron and free of Widmanstaeten graphite microstructure? (This item may not be an Owners Group recomendation. However, the staff notes that there has been at least one engine base nut pocket failure at the Anamax Mine due to reduced strength caused by non-ferrous impurities
)
in the engine base castin LP saddle #5 (one engine)g).
(2)
(3) Verify that all bearing cap studs have received torque and/or elongation measurement J.
Jacket Water Pump (1) Hardness and material check (2) Visually inspect shaft and wear ring for galling wear or scoring (3) LP gear teeth and transition area
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K.
Piston Skirts (1) LP of ribs near wrist pin and on rib at intersection of wrist pin boss L.
Turbocharger (1) Implement all Owners Group mcowmended modifications (e.g., drip and full-flow prelubrication systems) and operating procedures relating thereto.
(2) Verify compliance with Elliot 10 micron filter
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recomendations.
. Visual inspection of thrust bearing and nozzle ring Detemine end clearances (float measurement)
Verify proper number of bolts installed on turbine inlet casing (6) Check prowr torque on turbine inlet casing bolts (7) Perfom L1 on stationery nozzle ring i
Note: 1) Although D6ke did not take exception to items L.(3) through L.(7) above in their letter dated l
June 21, 1985, Duke stated in its letter dated April 30, 1985 that it would not perform a i
teardown and inspection of turbochargers which have accumulated less than 50 hours5.787037e-4 days <br />0.0139 hours <br />8.267196e-5 weeks <br />1.9025e-5 months <br /> operation.
The staff notes that engine 28 accumulated 'in excess of 50 hours5.787037e-4 days <br />0.0139 hours <br />8.267196e-5 weeks <br />1.9025e-5 months <br /> prior to the recent
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inspection. With mspect to engine 2A, the staff agrees that item L.(3) above need not be inspected until after 40 non-prelubed starts. However, the basis for not performing items L.(4) through i
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2 DL__ __., __,
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L L.(7) on engine 2A is not self evident and should be provided by Duke. For example, the Owners Group recomended that rotor float measurements be examined not just against the TDI/Elliot Specs, but for any trend of increasing clearance which could be indication of thrust bearing degradation. Without a baseline measurement,r. trending analysis will be delayed by at least one refueling cycle. Duke also needs to justify not performing items L.(5) through L.(7) above since subject bolts and guide vanes
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have been observed to be missing after very few hours service on other TDI engines.
2)
Item L.(8) below refers to actions recomended in DRQR repor?.3 for other plants (e.g.: RiverBend) but not in the DRQR report for Catawba. Duke should check with the Owners Group regarding the applicability of these actions to Catawba and provide justification to the NRC if these actions p.
are not applicable.
(8) Verify that SIM 300 was implemented and perform LP on the welds retaining the core plug (hub nut).
In addition, verify that the nut is staked.
M.
Rocker Ann Capscrews
- 1) MaterialandHardnesscheck(sample)
- 2) Visually inspect drive studs and verify tightness
- 3) Verify all capscrews properly preloaded to 365 ft-lbs.
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N.
High Pressure Fuel Lines
'J (1) Check that all fuel line supports called for by TDI drawings have been installed as specified.
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Mr. H. B. Tucker Duke Power Company.
Catawba Nuclear Station CC*
William L. Porter, Esq.
North Carolina Electric Membership Duke Power Company Corp.
t P.O. Box 33189 3333 North Boulevard Charlotte, North Carolina 28242 P.O. Box 27306 Raleigh, North Carolina 27611 1
J. Michael McGarry, III, Esq.
Bishop, Libeman, Cook, Purcell Saluda River Electric Cooperative, and Reynolds Inc.
1200 Seventeenth Street, N.W.
P.O. Box 929 Washington, D. C.
20036 Laurens, South Carolina 29360 North Carolina MPA-1 Senior Resident Inspector Suite 600 Route 2. Box 179N 3100 Smoketree Ct.
York, South Carolina 29745 I
P.O. Box 29513 Raleigh, North Carolina 27626-0513 Regional Administrator, Region II U.S. Nuclear Regulatory Comission, Mr. C. D. Markham 101 Marietta Street, NW, Suite 2900 Power Systems Division Atlanta, Georgia 30323 l
Westinghouse Electric Corp.
P.O. Box 355 Pittsburgh, Pennsylvania 15230 Robert Guild, Esq.
2759 Rosewood Drive NUS Corporation Columbia, South Carolina 29205 2536 Countryside Boulevard-Clearwater Florida 33515 Palmetto Alliance 2759 Rosewood Drive Mr. Jesse L. Riley, President Columbia, South Carolina 29205 Carolina Environmental Study Group 854 Henley Place Karen E. Long Charlotte, North Carolina 28208 Assistant Attorney General N.C. Department of Justice Richa'rd P. Wilson, Esq.
P.O. Box 629 Assistant Attorney General' Raleigh, North Carolina 27602
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S.C. Attorney General's Office P.O. Box 11549 Spence Perry, Esquire Columbia, South Carolina 29211 Associate General Counsel Federal Emergency Management Agency Piedmont Municipal Power Agency Room 840'
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100 Memorial Drive 500 C Street
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Greer, South Carolina 29651 Washington, D. C.
20472 i
Mark S. Calvert, Esq.
Mr. Michael Hirsch Bishop, Libeman, Cook, Federal Emergency Management Agency l
Purcell & Reynolds Office of the General Counsel i
1200 17th Street, N.W.
Room 840 Washington, D. C.
20036 500 C Street, S.W.
Washington, D. C.
20472 Brian P. Cassidy, Regional Counsel 1
Federal Emergency Management Agency, l
Region I
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J. W. McCormach P0CH Boston, Massachusetts 02109 i
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P
.. Catawba (amendments)
CC:
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Mr. Heyward G. Shealy, Chief Bure:u of Radiological Health l
South Carolina Department of Health and Environmental Control i
2600 Bull Street Columbia, South Carolina 29201 County Manager of York County York County Courthouse York, South Carolina 29745 i
Attorney General P.O. Box 11549 Columbia, South Carolina 29211 k
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