ML19353A190
| ML19353A190 | |
| Person / Time | |
|---|---|
| Site: | Shoreham File:Long Island Lighting Company icon.png |
| Issue date: | 11/26/1980 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Pollock M LONG ISLAND LIGHTING CO. |
| References | |
| NUDOCS 8101070407 | |
| Download: ML19353A190 (1) | |
Text
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UNITED STATES g,
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NUCLEAR REGULATORY COMMISSION REGION I o,
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November 26, 1980 Docket No. 50-322 Long Island Lighting Company ATTN:
Mr. M. S. Pollock Vice President - Nuclear 175 East Old Country Road Hicksville, New York 11801 1
Gentlemen:
The enclosed IE Information Notice No. 80-29, " Broken Studs on Terry Turbine Steam Inlet Flange," Supplement No. 1, is forwarded to you for information.
No written response is regi: ired.
If you desire additional information regarding this matter, please contact this office.
Sincerely,
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41& v 8'yce H. Grier p
' rector
Enclosures:
1.
IE Information Notice No. 80-29, Supplement No. 1 2.
List of Recently Issued IE Information Notices CONTACT:
D. L. Caphton (215-337-5266) cc w/encis:
J. P. Novarro, Projec' Manager Edward M. Bar-M t, esquire Edward J. Walsh, Esquire T. F. Gerecke, Manager, Engineering QA Department 0
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UNITED STATES 8006190028 NUCLEAR REGULATORY COMMISSION IN 80-29 0FFICE OF INSPECTION AND ENFORCEMENT Supplement No. 1 WASHINGTON, D.C.
20555 November 26, 1980 IE Information Notice No. 80-29 (Supplement No. 1):
BROKEN STUDS ON TERRY TURBINE STEAM INLET FLANGE Description of Circumstances:
In the original Information Notice the failed Terry Turbine steam inlet flange studs were identified as probably manufactured from ASTM-A193-Grade 87 steel.
Subsequently, the vendor has informed the NRC that the bolting material used at ANO-1 was AISI C-ll17 steel.
Independent laboratory analyses by the NRC and Arkansas Power and Light have verified that the bolting material was a re-sulphurized, re phosphorized cold drawn carbon steel.
From the analysis performed, the failure was caused by high overload which resulted in a priraarily brittle transgranular fracture (cleavage) in probably less than 10 cycles.
This is consistent with the operatina experience (water slugging) and the inherent low toughness of the bolting material used.
Licensees are encouraged to review the materials selected for safety-related bolting applications considering especially those situations where impact loadings could occur, The use of low toughness carbon steel (re-sulphurized free machining plain carbon steel) for bolting is discouraged by the NRC; particularly in situations where possible high loading conditions could be anticipated.
This Information Notice is pet.vided as an early notification of a possibly significant matter that is st!11 under review by the NRC staff.
It is expected that recipients will review the information for possible applicability to their i
facility.
No specific action or response is requested at this time.
If you have any questions regarding this matter, please contact the Director of the appropriate NRC Regional Office.
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IE Information Notice No. 80-29, Supplement No. 1 November 26, 1980 RECENTLY ISSUED IE INFORMATION NOTICES Information Subject Date Issued to Notice No.
Issued 80-41 Failure of Swing Check 11/10/80 All holders of Valve in the Decay Heat a power reactor Removal System at OL or CP Davis-Besse Unit No. 1 80-40 Excessive Nitrogen 11/6/80 All holders of Supply Pressure a power reactor OL Activates Safety-Relief or CP Valve Operation to Cause Reactor Depressurization 80-39 Malfunctions of 10/31/80 All holders of a Solenoid Valves power reactor OL or CP Manufactured by Valcor Engineering Corporation 80-38 Cracking in Charging 10/30/80 All holders of Pump Casing Cladding a PWR power reactor OL or CP 30-37 Containment Cooler 10/24/80 All holders of a Leaks and Reactor power reactor OL Cavity Flooding at or CP Indian Point Unit 2 80-36 Failure of Steam 10/10/80 All holders of a Generator Support power reactor Bciting OL or CP 80-35 Leaking and Dislodged 10/10/80 All holders of a Iodine-125 Implant Category G or G1 Seeds Medical License 80-34 Baron Dilution of 9/26/80 All holders of a Reactor Coolant During PWR Power Reactor OL Steam Generator Decontamination 80-33 Determination of 9/15/80 All holders of Teletherapy Timer a teletherapy Accuracy license
.