ML20117G464
| ML20117G464 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point, Palo Verde, Catawba, Harris, Grand Gulf, Byron, Braidwood, Susquehanna, River Bend, Vogtle, Waterford, South Texas, Comanche Peak  |
| Issue date: | 05/14/1996 |
| From: | Steffan A COOPER ENERGY SERVICES |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| REF-PT21-96 QCG-10273, NUDOCS 9605210284 | |
| Download: ML20117G464 (13) | |
Text
150 Uncoln Avenue Grove City, PA 16127 1898 Tel 412 458 8000 Fax 412 458 3574 Ajax@
COOPER c "
ENERGY SERVICES e nTlr*p'E.'"*"'
En-Tronic@
Penn Superior @
May 14,1996 Our Ref: OCG-10273 Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555
Subject:
Comment Letter - 10CFR21 Report by MKW Power Systems; NEl Peebles (Portec) Voltage Regulators - Voltage Adjust Potentiometer
Dear Sir:
In response to the above referenced 10CFR21 Report, Cooper Bessemer Reciprocating Products, a division of Cooper Cameron Corporation, has issued this letter to define utilities / plants containing similar equipment as supplied on Cooper Bessemer @ KSV and Enterprise @ DSR and DSRV Emergency Diesel Generators (EDG's).
Affected Utilities: COOPER-BESSEMER KSV EDG'S Pennsylvania Power and Light (Susquehanna)
Entergy Operations (LP&L, Waterford lil SES)
Commonwealth Edison Co. (Byron)
Commonwealth Edison Co. (Braidwood)
Arizona Public Service (Palo Verde)
Niagara Mohawk Power Co. (Nine Mile Point 2)
Houston Lighting and Power Co. (South Texas)
Affected Utilities: ENTERPRISE DSR AND DSRV EDG_'S Entergy Operations (Grand Gulf)
Entergy Operations (River Bend)
Carolina Power and Light (Shearon Harris)
Taiwan Power Co. (Kuosheng)
Duke Power (Catawba)
Texas Utilities (Comanche P 'k) l Georgia Power (Vogtle) fj 9605210284 960514 MI PDR ADOCK 05000220 V
g PDR IIl 1
J Paga 2 i
May 14,1996 l
OCG-10273 For your convenience, a copy of the MKW Power System's Report is attached. If you have any questions, I may be contacted at 412-458-3455.
l Sincerely, l
COOPER CAMERON CORPORATION Andr P. Steffan Supervisor, Quality Engineering Attachment APS:kil cc:
D. T. Blizzard - CES/GC J. M. Horne - CES/GC i
A. D. Gillette - CES/GC B. C. Guntrum - CES/ Alameda i
R. G. Billig - CES/GC File: K5fa38 I
l 1
l
, Paga 3 l
May 14,1996 l
OCG-1,0273 l
Copies to:
Mr. Terry O'Brien Mr. Walter Haass Commonwealth Edison Co.
U.S. Nuclear Regulatory Commission 1400 Opus Place One White Flint North Downers Grove, IL 60515 Washington, DC 20555 Mr. Lenny Schiavone Mr. Gary Hunt Niagara Mohawk Power Corp.
Houston Lighting and Power 301 Plainfield Road South Texas Project North Syracuse, NY 13212 Wadsworth, TX 77483 Ms. Kathleen Russo Mr. James Kenny Niagara Mohawk Power Corp.
Licensing Group Supervisor Nine Mile Road - Unit 2 Pennsylvania Power and Light P. O. Box G3 Two North Ninth Street Annex 2 Lycom!ng, NY 13093 Allentown, PA 18101 Mr. Neil Thibodaux Mr. Matthew Heidorn Arizona Public Service Pennsylvania Power and Light Palo Verde Nuclear Generating Station Susquehanna Steam Electric Station P. O. Box 52034 Mail Station 7566 P. O. Box 467 Phoeniz, AZ 85072-2034 Berwick, PA 18603 Mr. Thomas Bradish Mr. Terence Bannon Manager, Nuclear Regulatory Affairs Nuclear Regulatory Affairs A2-4 Arizona Public Service l
Pennsylvania Power and Light P. O. Box 52034 Mail Station 7636 2 North Ninth Street Phoeniz, AZ 85072-2034 Allentown, PA 18101 Mr. Terry Vandevoort Mr. David Baran Commonwealth Edison Commonwealth Edison Co.
Zion Generating Station Byron Nuclear Power Station 101 Shiloh Blvd.
4450 North German Church Rd.
Zion, IL 60099 Byron, IL 61010 Mr. Michael Kneble Mr. Arthur G. Killinger EnTergy Associates MPR Associates,Inc.
Louisiana Power and Light 320 King Street Waterford 3 SES Alexandria, VA 22314-3238 Highway 18 Taft. LA 70006 Carolina Power and Light Co.
Harris Nuclear Project Mr. Dave Gustafson P. O. Box 165 Commonwealth Edison Co.
New Hill, NC 27562 Braidwood Nuclear Power Station Attn:
William Robinson Tech Staff Electrical Group Vice President Route 1, Box 84 Braceville. IL 60407 Carolina Power and Light Co.
P. O. Box 1551 Mr. Doug Mullen Raleigh, NC 27602 i
Nebraska Public Power District Attn:
W. S. Orser Cooper Nuclear Station Executive Vice President P. O. Box 98 Brownville, Nebraska 68321
- Pago 4 May 14,1996 QCG-1,0273 Carolina Power and Light Co.
Duke Power Co.
Harris Nuclear Plant Nuclear Generation Dept.
J P. O. Box 165 P. O. Box 1007 New Hil!, NC 27562 Charlotte, NC 28201-1007 Attn:
Mickey Hamby Attn:
W. T. Robertson
- Vice President, Procurement Carolina Power and Light Co.
1 Brunswick Nuclear Plant Entergy NC Hwy. 87,2-1/2 Mi. North P. O. Box 429 Box 10429 Echelon One Southport, NC 28461 1340 Echelon Parkway Attn:
Roy A. Anderson Jackson, MS 39286-1995 Vice President Attn:
F. W. Titus (Fred)
Vice President, Engineering Carolina Power and Light Co.
Robinson Nuclear Plant Entergy SC Hwy.151 and 23, Box 790 P. O. Box 756 Hartsville, SC 29550 Port Gibson. MS 39150 Attn:
C. S. Hinnant Attn:
C. R. Hutchinson (Randy)
Vice President Vice Pres., Operations-GGNS Cleveland Electric illuminating Entergy Perry Nuclear Power Plant P. O. Box 756 P. O. Box 97 Port Gibson, MS 39150 Perry, OH 44081 Attn:
D. L. Pace, Director Attn:
M. Lister Design Engineering-GGNS i
Cleveland Electric illuminating Entergy l
Perry Nuclear Power Plant P. O. Box 756 l
P. O. Box 97 Port Gibson, MS 39150 Perry, OH 44081 Attn:
M. J. Meisner Attn:
Russell J. Tadych Director, NS&RA Manager, Quality Control Manager, Quality Services Cleveland Electric illuminating Entergy Operations Perry Nuclear Power Plant Box 756 P. O. Box 97 Port Gibson, MS 39150 Perry, OH 44081 Attn:
Harold M. Coon Southern Nuclear Operating Company Vogtle Project Cooper Enterprise Clearinghouse P. O. Box 1295 l
Duke Engineering & Service Birmingham, AL 35201 l
230 South Tryon St.
Attn:
Mgr., Nuclear Engineering i
P.O. Box 1004 and Licensing Charlotte, NC 28201-1004 Attn:
G. A. Harrison Georgia Power Co.
Plant Vogtle Duke Power Co.
P. O. Box 1600 Nuclear Generation Dept.
Waynesboro, GA 30830 P. O. Box 1007 Attn:
Mr. W. B. Shipman Charlotte, NC 28201-1007 General Manager Attn:
Mgr., Nuclear Safety
Pago 5 May 14,1996 OCG-1.0273 Gulf States Utilities T. R. Ho, Superintendent P. O. Box 220 Taiwan Power Company St. Francisville, LA 70775 Kuosheng Nuclear Power Station Attn:
L. A. England 60 Pa-Tou Yeh-Liu Village i
Director Nuclear Licensing Wan Li Hsiang, Taipei Hsien (20703), Taiwan, R.O.C.
Long Island Power Authority Shoreham Nuclear Power Station Mr. S. J. Tsuei J
Box 628 Director, Nuclear Safety Dept.
North Country Rd.
Taiwari Power Company Wading River, NY 11792 242 Roosevelt Road, Sec. 3 Attn:
Mgr. Licensing & Regulatory Taipei, Republic of China Compliance Department l
Southern California Edison San Onofre Nuclear Generating Station i
P. O. Box 128 i
San Clemente, CA 92672-0128 Attn:
Manager, Nuclear Oversite Div.
Southern California Edison San Onofre Nuclear Generating Station P. O. Box 128 San Clemente, CA 92672 Attn:
ISEG Supervisor j
Sacramento Municipal Utility District i
Rancho Seco Nuclear Power Plant 14440 Twin Cities Road Herald, CA 95638 3
Attn: Vice Pres. & Gen. Manager Tennessee Valley Authority 1101 Market Street, LP 4A-C Chattanooga, TN 37402 Attn:
Mr. M. J. Fecht Mgr. Nuclear Experience Review TU Electric - Production Division Group Vice President - Nuclear Skyway Tower 400 North Olive Street, L.B. 81 Dallas, TX 75201 Attn:
C. L. Terry Washington Public Power Supply P. O. Box 460 Richland, WA 99352 Attn:
Mr. L. C. Oakes Manager, WNP-1 Engineer
-... _. - ~.. -.
vApt-6_1-C0 11:50 J
RAKWFMM Ef2TTiEU@inc.
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i Report No. 10CFR21-0073 FEBRUARY 27, 1996 i
4 10CFR21 REPORTING OF DEFECTS AND NON-COMPLIANCE i
t COMPONENT:
1 Chicago Telephone Supply (CTS), p/n 115R251A Voltage Adjust Potenticanator l
SYSTEM:
Diesel Generator control systems with NEI Peebl'os (Portec) Voltage Regulators CONCLUSION:
Defect is Reportable in Accordance with 10CFR21 i
PREPARED BT:
r-DATE:
8 0 Donald D / Galeazzi Engineering Manager REVIENED BY:
APLL /MM.
DATE: M u nee Michael Nuding General Manager Quality Assurance r
l I
l Poes Office Son 1928 e Rothy Mount. Notta Caroleria 270021928 e Phone: (919) 977-2720 TWX: (510) 9294725 e FAX: (919) 446 3830
- ~. -
- A p r - O l'- 9 6 11:58 REPORT No. 10CFR21-0073 PAGE:
1 OF 5 SffMMA.RY MKW Power Systems witnessed repair and testing of a voltage regulator for FP&L Turkey Point at NEI Peebles on 2/10/96 and 2/11/96.
NEI manufactured many of the voltage regulators utilized in MKW's safety related diesel generators.
Voltage instability was observed and was determined to be caused by foreign material on the stationary wiper portion of the R4 voltage adjust potentiometer.
The potentiometer is 250 ohn, 2w, manufactured by Chicago Telephone Supply (CTS), p/n 115R251A and had been used by NEI for over twenty years for this application.
Because of availability problems, NEI replaced the CTS potentiometer with Maury Instrument Corporation 6 in 8/94).
This is an enclosed precision wirewound potentiometer, 250 ohm, 1.5w, with a shaft locking nut.
According to NEI, applied burden is 0.06w.
When costpared to the CTS component, the Maury is an upgrade in quality and appears to be less susceptible to contamination on the wiper surface.
The FPEL regulator had the R4 potentiometer replaced with the Maury part while at NEI and the voltage instability was corrected.
The purpose of the R4 potentiometer is to adjust generator voltage to rated value after installation of the remote voltage adjust motor operated potentiometer.
This is normally a one-time adjustment which occurs during initial installation /startup of the EDG and is applicable to the automatic and numual (if used) voltage' regulators.
MKW has been supplying NEI voltage regulators for safety related EDG control systems since 1972.
This incident and one prior in 1994 (FPEL EDG 4A and 4B respectively) are the only reported problems of this type; therefore, it is difficult to intezpret this occurrence as a defect.
In addition, because R4 is normally a one-time adjustment, any foreign material which develope /
accumulates on the wiper surface will not affoct voltage regulator operation because it will not interfere with the wiper surface to wiper arm interface.
It is recognized that this could cause problems if field adjustment of R4 is required; therefore, MKW Power Systems will notify all customers with KEI voltage regulators about this potential condition, cowpenfENT Chicago Telephone Supply (CTS), p/n ll5R251A (NEI p/n 01068).
Apr-01'-90 11:53 l
REPORT NO. 10CFR21-0073 i
PAGE:
2 OF 5 l
i rH M MERE AFFRETED AUTO VOLT REC MANUAL VnLT REn i
i U.S.
l Duke Power - Oconee
- 72-13000-100 i
FP&L - St. Lucia #2
- 72-05000-100
- 72-05100-100 j
FPEL - Turkey Point
- 72-13000-100
- 72-13200-100 Grand Gulf
- 72-03200-100
- 72-03100-100 l
Knolls Atomic - Kesselring
- 72-05000-100
- 72-05100-100 Portland G.E. - Trogan
- 72-00101-100 i
~
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PPEL - Susquehanna
- 72-08300-100
- 72-08400-100 SMUD
- 72-05000-100
- 72-05100-100 4
i TVA - Watts Bar
- 72-06204-100
- 72-05100-100 l
TVA - Watts Bar/Sequoyah
- 72-06204-100
- 72-05100-100 l
Wisconsin Elec - Pt Beach
- 72-05000-100
- 72-05100-100 i
l Foreign i
i l
Almaraz - Spain
- 72-05000-100
- 72-05100-100 l
CMV/G.E.
Spain
- 72-05000-100
- 72-05100-100 Cofrentes/G.E. - Spain
- 72-05000-100
- 72-05100-100 Korea Elec - Kori II
- 72-05000-100
- 72-05100-100
{
KRSKO - Slovenia
- 72-05000-100
)
Kuo Shang/G.E.
672-05000-100
- 72-05100-100 i
j Laguna verde (EPCS)"
- 72-01200-2015 472-01200-101 i
Laguna Verde - Units 1&2
- 72-05000-100
- 72-05100-100 Phillippines
- 72-05000-100
- 72-05100-100 i
scrita - Spain
- 72-05000-100
- 72-05100-100 f
i 1
l Microscopic examination of the potentiometer showed foreign material on the surf. ace and edge of the stationary slip-ring under tha' wiper arm collar.
The material on the edge was translucent / white-ish and appeared to be a lubricant.
The
}
material on the surface was blackish with some white flakes.
It i
is postulated that the lubricate accumulated contaminants and/or 3
dried on the surface.
The total amount of foreign material is l
very small.
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' ' Ap 601'-90 11:58 j
t i
l l
REPORT NO. 10CFR21-0073 i
PAGE:
3 OF 5 4
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('ONRRETIVE ACTTON i
l 1)
FPEL is in the process of updating their voltage regulators jl with the Maury potentiometer.
Other users should be aware o'f this possible problem and monitor their EDG output voltage i
for unstable output during routine testing.
Replacement of l
the potentiometer is dependent upon monitoring / testing.
Inunediate response to this notification does not appear to be i
necessary as the majority of the in-service voltage regulators have been operating without incident for i
approximately 15-20 years.
i 2)
The potentiometer is solder _d to a circuit boaed within the j
voltage regulator assembly; therefore, field modification is not recommaanded.
For replacement of the potenticaneter, it is recomunended that the regulator be returned to NEI (either directly or thrcugh MEW Power Systems) where proper testing j
can be performed before the regulator is returned to the j
custome:.
Contact MKW Parts Department for assistance.
If a regulator is to upgraded, we would also recosasand l
replacement of the R5 (stability) potentiometer which is the same type as the R4 potenticaneter except it is 100 ohns.
j ge ia eevi c.elv nee 4 nnm1_ nn valemna reem 1 mene nnmenh41(ew i
g,awfme stich ehm asi r ene i.-- e =".
The R5 potentkameter is CTS p/n 115R101A (NEI p/n 01070) and its replemament-is Maury p/n 50-M123-101.
l l
_. _ _. _ _ _. 7 j ApreOl*-CG 11:53 REPORT NO. 10CFR21-0073 PAGE:
4 OF 5 l
1 i
l-EIBIBIT 1
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(1 Page attached) a f
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I VOLTAGE ADJUST POTENTIOMETER "R4" i
NEI DRANING A-01068 CHICAGO TELEPHONE COMPANY POTENTIOMETER #115R251A i
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Apr-01*-se 11:5D REPORT NO. 10CFR21-0073 i
PAGE:
5 OF 5 1
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EIRIBIT 2 (1 page attached) e i
"R4" REP y n n T MAURY #50-M-123-251 a
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