ML18139A373
| ML18139A373 | |
| Person / Time | |
|---|---|
| Site: | Surry, North Anna  |
| Issue date: | 05/13/1980 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Ferguson J VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| References | |
| NUDOCS 8006300137 | |
| Download: ML18139A373 (4) | |
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UNITED STATES C
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NUCLEAR REGULATORY COMMISSION REGIOM II 0
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In Reply Refer To:
RII:JPO 50-338, 50-339 50-404 50-405
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101 MARIETTA ST., N.W., SUITE 3100 ATLANTA, GEORGIA 30303 MAY 1 3 1980 Virgtnia Electric and Power Company Attn':
J. H. Ferguson
' Executive Vice President-Power P. O. Box 26666 Richmond, VA 23261 Gentlemen:
The enclosed IE Circular No. 80-11 is forwarded to you for information.
No written response is required.
Should you have any questions related to your understanding of the recommendations on this matter, please contact this office.
Enclosures:
- 1.
IE Circular No. 80-11
- 2.
List of Recently Issued IE Circulars r
8006 300 \\ 3)r Sincerely,
~~~-
James P. O'Reilly Director
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Virginia Electric and Power Company cc w/encl:
e W.R. Cartwright, Station Manager Post Office Box 402 Mineral, Virginia 23117 P. G. Perry Senior Resident Engineer Post Office Box 38 Mineral, Virginia 23117 J. L. Wilson, Manager Post Oftice Box 315 Surry, ~irginia 23883 MAY 1 3 1980.:.: *-
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UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C. 20555 May 13, 1980 SSINS No. : 6830 Accession No.:
8002280662 IE Circul~r No. 80-11 EMERGENCY DIESEL GENERATOR LUBE OIL COOLER FAILURES D~scrieftion 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 corro.s.ion 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 1 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 May 13, 1980 e
RECENTLY ISSUED IE CIRCULARS Circular No.
80-11 8p-10 1
80-09 80-08 80-07 80-06 80-05 80-04.
80-03 80-02 80-01 Subject Emergency Diesel Generator Lube Oil Cooler Failures Failure to Maintain Environmental Qualification of Equipment Problems With Plant Internal Communications Systems BWR Technical Specification Inconsistency - RPS Response Time Problems with HPCI Turbine Oil System Control and Accountability Systems for Implant Therapy Sources Emergency Diesel-Generator Lubricating Oil Addition and Onsite Supply Securing ~f Threaded Locking Devices on Safety-Related Equipment Protection from Toxic Gas*
Hazards Nuclear Power Plant Staff Work Hours Service Advice for GE Induction Disc Relays Date of Issue 5/13/80 4/29/80 4/28/80 4/18/80 4/3/80 4/14/80 4/1/80 3/14/80 3/6/80 2/1/80 1/17/80 Enclosure Issued to All~holders of Reactor OLs and CPs All holders of Reactor OLs and CPs All holders of a power reactor OL or CP All General Electric BWR's holding a power reactor OL All holders of a power reactor OL or CP Medical licensees in Categories G and Gl All holders of a power reactor OL or CP All holders of a power reactor OL or CP All holders of a power reactor 01 All holders of Reactor OLs, including research and test reactors, and CPs All licensee.s of nuclear power reactor operating facilities and holders of nuclear power reactor CPs