Inadequate Design of Safety-Related Heat Exchangers| ML031180203 |
| Person / Time |
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| Site: |
05000000 |
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| Issue date: |
12/27/1979 |
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| From: |
NRC/OI |
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| To: |
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| References |
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| IN-79-034, NUDOCS 7910250517 |
| Download: ML031180203 (2) |
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Category:NRC Information Notice
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Information Notice 1990-02, Potential Degradation of Secondary Containment1990-01-22022 January 1990
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Information Notice 1990-01, Importance of Proper Response to Self-Identified Violations by Licensees1990-01-12012 January 1990
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Information Notice 1989-89, Event Notification Worksheets1989-12-26026 December 1989
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Information Notice 1989-88, Recent NRC-Sponsored Testing of Motor-Operated Valves1989-12-26026 December 1989
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Information Notice 1989-87, Disabling of Emergency Diesel Generators by Their Neutral Ground-Fault Protection Circuitry1989-12-19019 December 1989
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Information Notice 1989-85, Epa'S Interim Final Rule on Medical Waste Tracking and Management1989-12-15015 December 1989
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Information Notice 1989-86, Type Hk Circuit Breakers Missing Close Latch Anti-Shock Springs1989-12-15015 December 1989
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Information Notice 1989-83, Sustained Degraded Voltage on the Offsite Electrical Grid and Loss of Other Generating Stations as a Result of a Plant Trip1989-12-11011 December 1989
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Information Notice 1989-59, Suppliers of Potentially Misrepresented Fasteners1989-12-0606 December 1989
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Information Notice 1989-79, Degraded Coatings and Corrosion of Steel Containment Vessels1989-12-0101 December 1989
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Information Notice 1989-75, Falsification of Welder Qualifications for Contractor Employees1989-11-20020 November 1989
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Information Notice 1989-74, Clarification of Transportation Requirements Applicable to Return of Spent Radiopharmacy Dosages from Users to Suppliers1989-11-0707 November 1989
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Information Notice 1989-58, Disablement of Turbine-Driven Auxiliary Feedwater Pump Due to Closure of One of the Parallel Steam Supply Valves1989-08-0303 August 1989
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1990-03-09
[Table view] |
UNITED STATES SSINS Mo.: 6870
NUCLEAR REGULATORY COMMISSION Accession No.:
OFFICE OF INSPECTION AND ENFORCEMENT 7910250517 WASHINGTON, D.C. 20555 December 27, 1979 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 (CCWI) 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 damaged 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:
Manfacturer: Industrial Process Engineers, Inc.
Type: CFU (Special)
Size: 55-342 Serials: 6662-1; 6662-2
6663-1; 6663-2 This Information Notice is provided as an early notification of a possibly signi- ficiant 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.
IE Information Notice No. 79-34 Enclosure
December 27, 1979
RECENTLY ISSUED
IE INFORMATION NOTICES
Information Subject Date Issued To
Notice No. Issued
79-33 Improper Closure of 12/21/79 All power reactor facilities
Primary Containment holding OLs and CPs
Access Hatches
79-32 Separation of Electrical 12/21/79 All power reactor facilities
Cables for HPCI and ADS holding OLs and CPs
79-31 Use of Incorrect Amplified 12/13/79 All holders of power reactor
Response Spectra (ARS) OLs and CPs
79-30 Reporting of Defects and 12/6/79 All power reactor facilities
Noncompliance, 10 CFR Part 21. holding OLs and CPs and
vendors inspected by LCVIP
79-29 Loss of NonSafety-Related 11/16/79 All power reactor facilities
Reactor Coolant System holding OLs or CPs
Instrumentation During
Operation
79-28 Overloading of Structural 11/16/79 All power reactor facilities
Elements Due to Pipe Support with an OL or CP
Loads
79-27 Steam Generator Tube 11/16/79 All power reactor facilities
Ruptures At Two PWR holding OLs and CPs
Facilities79-12A Attempted Damage To New 11/9/79 All Fuel Facilities, Fuel Assemblies research reactors, and
power reactors with an
OL or CP
79-26 Breach of Containment 11/5/79 All power reactor facilities
Integrity holding OLs and CPs
79-25 Reactor Trips At Turkey 10/1/79 All power facilities with
Point Units 3 And 4 an OL or a CP
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| list | - Information Notice 1979-01, Bergen-Paterson Hydraulic Shock & Sway Arrestors (Hssa) (2 February 1979)
- Information Notice 1979-01, Bergen-Paterson Hydraulic Shock & Sway Arrestors (HSSA) (2 February 1979)
- Information Notice 1979-03, Limitorque Valve Geared Limit Switch Lubricant (9 February 1979)
- Information Notice 1979-04, Degradation of Engineered Safety Features (16 February 1979)
- Information Notice 1979-05, Use of Improper Materials in Safety-Related Components (21 March 1979)
- Information Notice 1979-06, Stress Analysis of Safety-Related Piping (23 March 1979, Topic: Earthquake)
- Information Notice 1979-07, Rupture of Radwaste Tanks (26 March 1979)
- Information Notice 1979-08, Interconnection of Contaminated Systems with Service Air Systems Used as Source of Breathing Air (28 March 1979)
- Information Notice 1979-08, Interconnection of Contaminated Systems With Service Air Systems Used As Source of Breathing Air (28 March 1979)
- Information Notice 1979-09, Spill of Radioactively Contaminated Resin (30 March 1979, Topic: Hydrostatic)
- Information Notice 1979-19, Pipe Cracks in Stagnant Borated Water Systems at PWR Plants (17 July 1979, Topic: Boric Acid, Hydrostatic, Liquid penetrant)
- Information Notice 1979-20, NRC Enforcement Policy - NRC Licensed Individuals (7 September 1979)
- Information Notice 1979-21, Transportation & Commercial Burial of Radioactive Material (7 September 1979)
- Information Notice 1979-22, Qualification of Control Systems (14 September 1979)
- Information Notice 1979-24, Overpressurization of Containment of a PWR Plant After a Main Steam Line Break (1 October 1979)
- Information Notice 1979-25, Reactor Trips at Turkey Point Units 3 & 4 (1 October 1979)
- Information Notice 1979-26, Breach of Containment Integrity (5 November 1979)
- Information Notice 1979-28, Overloading of Structural Elements Due to Pipe Support Loads (16 November 1979)
- Information Notice 1979-29, Loss of Nonsafety-Related Reactor Coolant System Instrumentation During Operation (16 November 1979)
- Information Notice 1979-30, Reporting of Defects & Noncompliances, 10 CFR Part 21 (6 December 1979)
- Information Notice 1979-31, Use of Incorrect Amplified Response Spectra (13 December 1979)
- Information Notice 1979-32, Separation of Electrical Cables for HPCI and ADS (21 December 1979, Topic: Fire Watch)
- Information Notice 1979-33, Improper Closure of Primary Containment Equipment Access Matches (21 December 1979)
- Information Notice 1979-34, Inadequate Design of Safety-Related Heat Exchangers (27 December 1979)
- Information Notice 1979-35, Control of Maintenance & Essential Equipment (31 December 1979)
- Information Notice 1979-36, Computer Code Defect in Stress Analysis of Piping Elbow (31 December 1979)
- Information Notice 1979-37, Cracking in Low Pressure Turbine Discs (28 December 1979, Topic: Turbine Missile)
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