ML19318B806
| ML19318B806 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 05/13/1980 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Hancock J FLORIDA POWER CORP. |
| References | |
| NUDOCS 8006300083 | |
| Download: ML19318B806 (2) | |
Text
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UNITED STATES 8
NUCLEAR REGULATORY COMMISSION o
E REGION il o
101 MARIETTA ST., N.W SUITE 3100 g
ATLANTA, GEOMGLA 30303 In Reply Refer To:
MAY 131980 RI_I:JPO.,
50-3.02 J Florida Power Corporation
' Attn:
J. A. Hancock, Director Nuclear Operation.s P. O. Box 14042, Mail Stop C-4 St. Petersburg, FL 33733 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.
Sincerely, I
N DN James P. O'R illy Director
Enclosures:
1.
IE Circular No. 80-11 2.
List of Recently Issued IE Circulars i
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MAY 131980 Florida Power C rp:rctica 2-cc w/ encl:
D. C. Poole Nuclear Plant Manager Post Office Box 1240 Crystal River, Florida 32629 4
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UNITED STATES 8002280662 NUCLEAR REGULATORY C0'efIS'10N OFFICE OF INSPECTION AND ENFCACEMENT WASHINGTON, D.C. 20555 g
May 13, 1980 IE Circular No. 80-11 EMERGtCY DIESEL GENERATOR LUBE OIL COOLER FAILURES Descup, tion of Circumstances:
Nithin a two week period (August 27 to September 11, 1979), the tube sheets fsiled in the lube oil coolers of both emergency diesel generators for Arkansas Nuclear One (ANO) Unit No.1.
The introduction of water into tb; diesel lube o:.1 system resulted in trips of both diesels during surveillance testing. The d:'esels were not considered capable of sustained operation. Thet.e events were previously identified to all operating license and construction permit holders by Information Notice 79-23, Emergency Diesel Generator Lube Oil Cooler on i
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 l
that the failures were caused by severe corrosion of the solder which sealed j
the tubes to :.he tube sheets. The corrosion inhibitor in use at ANO was Calgon i
CS, a borate-aitrite type inhibitor. The manufacturer of this type of inhibitor 1
has recommended the use of hard solder in CS treated systems. EMD does not reconsnend the use of Calgon CS since the puddle solder used in EMD radiators j
.nd 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 cf 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 Enclosure May 13, 1980 RECENTLY ISSUED Il CIRCULARS Circular Subject Date of Issued to No.
Issue 80-11 Emergency Diesel Generator 5/13/80 All: holders of Reactor Lube Oil Cooler Failures OLs and cps 80-10 Failure to Maintain 4/29/80 All holders of Reactor Environmental Qualification 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 liceasees 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 r= actor 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 Reaccor 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
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