ML18136A426
| ML18136A426 | |
| Person / Time | |
|---|---|
| Site: | Surry, North Anna  |
| Issue date: | 12/27/1979 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Proffitt W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| References | |
| NUDOCS 8001240494 | |
| Download: ML18136A426 (4) | |
Text
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In Reply Refer To:
RII:JPO 338, 50-339 5Q::Ml4 50-4~
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e UNITED STATES NUCLEAR REGULATORY COMMISSION REGION II 101 MARIETTA ST., N.W., SUITE 3100 ATLANTA, GEORGIA 30303 DEC 2 7 1979 Virginia Electric and Power Company Attn:
W. L. Proffitt Senior Vice President,
.- Power P. O. Box 26666 Richmond, Virginia 23261 Gentlemen:
e This _Information Notice is provided as an early notification of a possibly significant matter. It is expected that recipients will review the information for possible applicability to their facilities.
No specific action or response is requested at this time.
If further NRC evaluations so indicate, an IE Circular or Bulletin will be issued to recommend or request specific licensee actions.
If you have questions regarding this matter, please contact the Director of the appropriate NRC Regional Office.
Enclosures:
- 1.
IE Information Notice No. 79-34
- 2.
List of Recently Issued IE Information Notices Sincerely,
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James'P. O'Reilly Director 8 C Gl 2 4@ +.il (Q-ltv-L-
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
- W. L.* Stewart, Manager Post Office Box 315 Surry, Virginia 23883 e
- !')EC 2 7 1979 *.
I e
UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFOCEMENT WASHINGTON, D. C.
20555 December 27, 1979 SSINS No.:
6870 Accession No.:
7910250517 IE Information Notice No. 79-34 INADEQUATE DESIGN *OF SAFETY-RELATED HEAT EXCHANGERS Tennessee Valley Authority (TVA) submitted an initial 50.55(e) report on October 25, 1979, that identified defects in the four.Containment Spray (CS) heat exchangers at the Sequoyah facility.
The heat exchanger tube bundles were damaged by excessive vibrations of the tubes against each other.
These vibrations were caused by a support arrangement that allows excessive unsupported tube lengths.
The large amplitude tube vibration has resulted in reductions in wall thickness and some tube leakage.
The CS heat exchangers at Sequoyah had only been in operation for a short period of time prior to the failure being detected.
These heat exchangers were manufactured by Industrial Process Engineers, Inc. (IPE),
a vendor now out of business.
The Component Cooling Water (CCW) heat exchangers at the Sequoyah facility were also made by IPE.
TVA has identified some reduction.in wall thickness and minor tube leakage in the CCW*heat exchangers.
The licensee plans to plug the da~aged tubes on the CS heat exchangers and "stake" (support) the tube bundles to prevent further damage.
Further corrective action is under review by the licensee.
The following data applies to the CS heat exchangers.
Manufacturer:
Type:
Size:
Serials:
Industrial Process Engineers, Inc.
CFU (Special) 55-342 -
6662-1; 6662-2 6663-1; 6663-2 This Information Notice is provided as an early notification of a possibly significant matter that is still under review by the NRC staff.. It is expected that recipients will review the information for possible applicability to their facilities.
No specific action or response is requested at this time.
If NRC evaluations so indicate, further licensee actions may be requested or required.
No written response to this Information Notice is required.
If you have any questions regarding this matter please contact the Director of the appropriate NRC Regional Office.
e IE Information Notice No. 79-34 December 27, 1979 Information Notice No. 79-34 79-33 79-32 79-31 79-30 79-29 79-28 79-27 79-12A 79-26 79-25 79-24 RECENTLY ISSUED IE INFORMATION NOTICES Subject Inadequate Design of Safety-Related Heat Exchangers Improper Closure of Primary Containment Equipment Access Hatches Date Issued 12/27/79 12/21/79 Separation of Electrical 12/21/79 Cables for HPCI and ADS Use of Incorrect Amplified 12/13/79 Response Spectra (ARS)
Reporting of Defects and 12/6/79 Noncompliances, 10 CFR Part 21 Loss of NonSafety-Related 11/16/79 Reactor Coolant System Instrumentation During Operation Overloading of Structural 11/16/79 Elements Due to Pipe Support Loads Steam Generator Tube 11/16/79 Ruptures At Two PWR Facilities Attempted Damage To New 11/9/79 Fuel Assemblies Breach of Containment 11/5/79 Integrity Reactor Trips At Turkey 10/1/79 Point Units 3 And 4 Overpressurization Of 10/1/79 Containment Of A PWR Plant After A Main Steam Line Break e
Enclosure Issued To All holders of power reactor OLs and CPs All holders of power reactor OLs and CPs All power reactor facilities holding OLs and CPs All power reactor facilities holding OLs and CPs All power reactor facilities holding OLs and CPs and vendors inspected by LCVIP All power reactor facilities holding OLs or CPs All power reacto~ facilities with an OL or CP All power reactor facilities holding OLs and CPs All Fuel Facilities, research reactors, and power reactors with an OL or CP All power reactor facilities holding OLs and CPs All power facilities with an OL or a CP.
All power reactor facilities with a CP