ML19318B802
| ML19318B802 | |
| Person / Time | |
|---|---|
| Site: | Farley  |
| Issue date: | 05/13/1980 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Mcdonald R ALABAMA POWER CO. |
| References | |
| NUDOCS 8006300074 | |
| Download: ML19318B802 (2) | |
Text
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'o UNITED STATES 8
g NUCLEAR REGULATORY COMMISSION c.
1 g
a REGION 11 e
101 MARIETTA ST,. N.W SUITE 3100 ATLANTA.GEORotA 30303 MAY 131980 In Reply Refer To:
RII:JPO C50-348 x50-364 s._
Alab5ma Power Company
- Attn:.
R. P. Mcdonald Vice President-Nuclear Generation Post Office Box 2641 Birmingham, AL 35291 Gentlemen:
The enclosed IE Circular No. 80-11 is forwarded to you for information.
No written response is required. Should you have any questicas related to your understanding of the recommendations on this matter, please contact this office.
Sincerely,
.NN James P. O'Reilly Director
Enclosures:
1.
IE Circular No. 80-11 2.
List of Recently Issued IE Circulars B
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MAY 131980 Alabama Power Company.
cc w/ enc 1:
A. R. Barton Executive Vice President Post Office Box 2641 Birmingham, Alabama 35291 F. L. Clayton, Jr.
Senior Vice President Post Office Box 2641 Birmingham, Alabama 35291 J..W.NcGowan Manager-Operations Quality Assurance Post Office Box 2641 Birmingham, Alabama 35291
- 0. D. Kingsley, Jr.
Manager, Nuclear Engineering and Technical Services Post Office Box 2641 Birmingham, Alabama 35291 H. O. Thrash Manager, Nuclear Generation Post Office Box 2641 Birmingham, Alabama 35291 W. C. Petty Manager-Quality-Design Assurance (Design and Construction)
Post Office Box.:641 Birmingham, Alabama 35291 W. G. Hairston, III Plant NWnager Drawer 470 Ashford, Alabama 36312 R. E. Hollands, Jr.
QA Supervisor Post Office Box U Ashford, Alabama 36312 l
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UNITED STATES 8002280662 NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C. 20555 52"'
v May 13, 1980 IE Circular No. 80-11 EMERGENCY DIESEL GENERATOR LUBE OIL COOLER FAILURES Descrip, tion of Circumstances:
Within a two week period (August 27 to September 11, 1979), the tube sheets failed in the lube oil coolers of both emergency diesel generators for Arkansas Nuclear One (ANO) Unit No. 1.
The introduction of water into the diesel lube oil system resulted in trips of both diesels during surveillance testing. The diesels were not considered capable of sustained operation. These events were previously identified to all operating license and construction permit holders by Information Notice 79-23, Emergency Diesel Generator Lube Oil Cooler on September 25, 1979. The emergency diesel generators involved were manufac-tured by the Electro-Motive Division (EMD) of the General Motors Corporation and the failures occurred on engines 71-Al-1117 and 71-Al-1130. The failed lube oil coolers were manufactured by the Young Radiator Company.
An analysis of the failed coolers performed by EMD resulted in the conclusion that the failures were caused by severe corrosion of the solder which sealed the tubes to the tube sheets. The corrosion inhibitor in use at ANO was Calgon CS, a borate-nitrite type inhibitor. The manufacturer of this type of inhibitor has recommended the use of hard solder in CS treated systems.
EMD does not recommend the use of Calgon CS since the puddle solder used in EMD radiators and oil coolers is considered to be soft solder of a lead-tin composition.
Recommended Action for Licensees' Consideration:
Based on the above, it is recommended that licensees:
1.
Verify that the corrosion inhibitor used in cooling water systems of the emergency diesel generators is compatible with all materials wetted by the cooling water and the engine manufacturer's specific recommendations.
Also, by means of the engine maintenance history, verify that the system corrosion inhibitor has been properly monitored and maintained at the recommended concentration.
2.
If Item I cannot be successfully performed, the affected components should be inspected in accordance with the manufacturer's recommendations.
No written response to this Circular is required.
If you desire additional information regarding this matter, contact the Director of the appropriate NRC Regional Office.
IE Circular No. 80-11 Enclosure May 13, 1980 RECENTLY ISSUED IE CIRCULARS Circular Subj ect Date of Isrued to No.
Issue 80-11 Emergency Diesel Generator 5/13/80 All ho1ders of Reactor s
Lube Oil Cooler Failures OLs and cps 80-10 Failure to Maintain 4/29/80 All holders of Reactor Environmental Qua:iff. cation OLs and cps of Equipment 80-09 Problems With Plant Internal 4/28/80 All holders of a power Communications Systems reactor OL or CP 80-08 BWR Technical Specification 4/18/80 All General Electric Inconsistency - RPS Response BWR's holding a power Time reactor OL 80-07 Problems with HPCI Turbine 4/3/80 All holders of a power Oil System reactor OL or CP 80-06 Control and Accountability 4/14/80 Medical licensees in Systems for Implant Therapy Categories G and G1 Sources 80-05 Emergency Diesel-Generator 4/1/80 All holders of a power Lubricating Oil Addition and reactor OL or CP Onsite Supply 80-04 Securing of Threaded Locking 3/14/80 All holders of a power Devices on Safety-Related reactor OL or CP Equipment 80-03 Protection from Toxic Gas 3/6/80 All holders of a Hazards power reactor OL 80-02 Nuclear Power Plant Staff 2/1/80 All holders of Reactor Work Hours OLs, including research and test reactors, and cps 80-01 Service Advice for GE 1/17/80 All licensees of Induction Disc Relays nuclear power reactor operating facilities and holders of nuclear power reactor cps s-hg e. %
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