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| ==Description of Circumstances== | | ==Description of Circumstances== |
| :Recently, the NRC was informed that, in the course of the inspections pursuantto IE Bulletin No. 79-02 and 79-14 by the Portland General Electric Co. (PGE) atthe Trojan Nuclear Plant, some walls were found which did not have adequatestructural strength to sustain the required support reactions. Bechtel Corporationwas the Architect Enaineer for the plant. These structural inadequacies werereported to be attributable to two deficiencies:1) Apparent lack of a final check of certain pipe support locations and reactionsto ensure that the supporting structural elements possessed adequatestructural integrity to sustain the required loads.2) Inadeouate design criteria for the reactions from supports anchored intothe face of concrete block walls; e.g., relying on the combined strengthof double concrete block walls without positive connection between thetwo walls by means other than the bond provided by a layer of grout betweenthem.The NRC is currently pursuing these issues in detail for the Trojan Nuclear Plantto determine the extent of these deficiencies and the generic implications forother Bechtel facilities.This Information Notice is provided as an early notification of a possible signif-icant matter. It is expected that recipients will review the information forpossible applicability to their facilities and the actions being performed underIE Bulletin No. 79-02. Specific action is being requested relating to the adequacyof attachments to concrete block walls under IE Bulletin No. 79-02, Revision 2,item 5.c. No specific actions are requested in response to this Information Notice.If NRC evaluations so indicate, further licensee actions may be requested orrequired. If you have any questions regarding this matter, please contact theDirector of the appropriate NRC Regional Office.No written response to this IE Information Notice is require IE Information Notice No. 79-28November 16, 1979RECENTLY ISSUEDIE INFORMATION NOTICESEnclosureInformationNotice No.SubjectDateIssuedIssued To79-2779-12A79-2679-2579-24Steam Generator Tube 11/16!:Ruptures At Two PWRFacilitiesAttempted Damage To New 11/9/7'Fuel AssembliesBreach of Containment 11/5/79IntegrityReactor Trips At Turkey 10/1/79Point Units 3 And 4Overoressurization Of 10/1/79Containment Of A PWR PlantAfter A Main Steam LineBreakEmergency Diesel Generator 9/26/79Lube Oil CoolersQualification of Control 9/14/7iSystemsTransportation and Commercial 9/7/79Burial of Radioactive Material79 All Power reactor facilitiesholding OLs and CPsAll Fuel Facilities,research reactors, andDower reactors with anOL or CPAll power reactor facilitiesholding OLs and CPsAll nower facilities withan OL or a CPAll power reactor facilitieswith a CPAll power reactorfacilities holding OLsand CPs79-2379-2279-219 All Dower reactorfacilities withoperating licensesand construction permits.All power and researchreactors with OL'sAll Holders of ReactornLs and CPs and ProductionLicensees with Licensednperators79-20(Rev. 1)NRC Enforcement PolicyNRC Licensed IndividualsNRC Enforcement PolicyNRC Licensed Individualsc9/7/7979-208/14/79 All Holders of ReactorOLs and CPs and ProductionLicensees with LicensedOnerators}} | | :Recently, the NRC was informed that, in the course of the inspections pursuantto IE Bulletin No. 79-02 and 79-14 by the Portland General Electric Co. (PGE) atthe Trojan Nuclear Plant, some walls were found which did not have adequatestructural strength to sustain the required support reactions. Bechtel Corporationwas the Architect Enaineer for the plant. These structural inadequacies werereported to be attributable to two deficiencies:1) Apparent lack of a final check of certain pipe support locations and reactionsto ensure that the supporting structural elements possessed adequatestructural integrity to sustain the required loads.2) Inadeouate design criteria for the reactions from supports anchored intothe face of concrete block walls; e.g., relying on the combined strengthof double concrete block walls without positive connection between thetwo walls by means other than the bond provided by a layer of grout betweenthem.The NRC is currently pursuing these issues in detail for the Trojan Nuclear Plantto determine the extent of these deficiencies and the generic implications forother Bechtel facilities.This Information Notice is provided as an early notification of a possible signif-icant matter. It is expected that recipients will review the information forpossible applicability to their facilities and the actions being performed underIE Bulletin No. 79-02. Specific action is being requested relating to the adequacyof attachments to concrete block walls under IE Bulletin No. 79-02, Revision 2,item 5.c. No specific actions are requested in response to this Information Notice.If NRC evaluations so indicate, further licensee actions may be requested orrequired. If you have any questions regarding this matter, please contact theDirector of the appropriate NRC Regional Office.No written response to this IE Information Notice is required. |
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| | IE Information Notice No. 79-28November 16, 1979RECENTLY ISSUEDIE INFORMATION NOTICESEnclosureInformationNotice No.SubjectDateIssuedIssued To79-2779-12A79-2679-2579-24Steam Generator Tube 11/16!:Ruptures At Two PWRFacilitiesAttempted Damage To New 11/9/7'Fuel AssembliesBreach of Containment 11/5/79IntegrityReactor Trips At Turkey 10/1/79Point Units 3 And 4Overoressurization Of 10/1/79Containment Of A PWR PlantAfter A Main Steam LineBreakEmergency Diesel Generator 9/26/79Lube Oil CoolersQualification of Control 9/14/7iSystemsTransportation and Commercial 9/7/79Burial of Radioactive Material79 All Power reactor facilitiesholding OLs and CPsAll Fuel Facilities,research reactors, andDower reactors with anOL or CPAll power reactor facilitiesholding OLs and CPsAll nower facilities withan OL or a CPAll power reactor facilitieswith a CPAll power reactorfacilities holding OLsand CPs79-2379-2279-219 All Dower reactorfacilities withoperating licensesand construction permits.All power and researchreactors with OL'sAll Holders of ReactornLs and CPs and ProductionLicensees with Licensednperators79-20(Rev. 1)NRC Enforcement PolicyNRC Licensed IndividualsNRC Enforcement PolicyNRC Licensed Individualsc9/7/7979-208/14/79 All Holders of ReactorOLs and CPs and ProductionLicensees with LicensedOnerators |
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Overloading of Structural Elements Due to Pipe Support LoadsML031180186 |
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Issue date: |
11/16/1979 |
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NRC/IE |
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To: |
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References |
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IN-79-028, NUDOCS 7910250485 |
Download: ML031180186 (2) |
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Category:NRC Information Notice
MONTHYEARInformation Notice 1990-15, Reciprocity Notification of Agreement State Radiation Control Directors Before Beginning Work in Agreement States1990-03-17017 March 1990 Reciprocity Notification of Agreement State Radiation Control Directors Before Beginning Work in Agreement States Information Notice 1990-18, Potential Problems With Crosby Safety Relief Valves Used on Diesel Generator Air Start Receiver Tanks1990-03-0909 March 1990 Potential Problems With Crosby Safety Relief Valves Used on Diesel Generator Air Start Receiver Tanks Information Notice 1990-18, Potential Problems with Crosby Safety Relief Valves Used on Diesel Generator Air Start Receiver Tanks1990-03-0909 March 1990 Potential Problems with Crosby Safety Relief Valves Used on Diesel Generator Air Start Receiver Tanks Information Notice 1990-17, Weight and Center of Gravity Discrepancies for Copes-Vulcan Valves1990-03-0808 March 1990 Weight and Center of Gravity Discrepancies for Copes-Vulcan Valves Information Notice 1990-16, Compliance with New Decommissioning Rule1990-03-0707 March 1990 Compliance with New Decommissioning Rule Information Notice 1990-14, Accidental Disposal of Radioactive Materials1990-03-0606 March 1990 Accidental Disposal of Radioactive Materials Information Notice 1990-13, Importance of Review and Analysis of Safeguards Event Logs1990-03-0505 March 1990 Importance of Review and Analysis of Safeguards Event Logs Information Notice 1990-11, Maintenance Deficiency Associated with Solenoid-Operated Valves1990-02-28028 February 1990 Maintenance Deficiency Associated with Solenoid-Operated Valves Information Notice 1990-12, Monitoring or Interruption of Plant Communications1990-02-28028 February 1990 Monitoring or Interruption of Plant Communications Information Notice 1990-09, Extended Interim Storage of Low-Level Radioactive Waste by Fuel Cycle and Materials Licensees1990-02-0505 February 1990 Extended Interim Storage of Low-Level Radioactive Waste by Fuel Cycle and Materials Licensees Information Notice 1990-08, KR-85 Hazards From Decayed Fuel1990-02-0101 February 1990 KR-85 Hazards From Decayed Fuel Information Notice 1990-08, KR-85 Hazards from Decayed Fuel1990-02-0101 February 1990 KR-85 Hazards from Decayed Fuel Information Notice 1990-07, New Information Regarding Insulation Material Performance and Debris Blockage of PWR Containment Sumps1990-01-30030 January 1990 New Information Regarding Insulation Material Performance and Debris Blockage of PWR Containment Sumps Information Notice 1990-06, Potential for Loss of Shutdown Cooling While at Low Reactor Coolant Levels1990-01-29029 January 1990 Potential for Loss of Shutdown Cooling While at Low Reactor Coolant Levels Information Notice 1990-05, Inter-System Discharge of Reactor Coolant1990-01-29029 January 1990 Inter-System Discharge of Reactor Coolant Information Notice 1990-03, Malfunction of Borg-Warner Bolted Bonnet Check Valves Caused by Failure of the Swing Arm1990-01-23023 January 1990 Malfunction of Borg-Warner Bolted Bonnet Check Valves Caused by Failure of the Swing Arm Information Notice 1990-02, Potential Degradation of Secondary Containment1990-01-22022 January 1990 Potential Degradation of Secondary Containment Information Notice 1990-01, Importance of Proper Response to Self-Identified Violations by Licensees1990-01-12012 January 1990 Importance of Proper Response to Self-Identified Violations by Licensees Information Notice 1989-89, Event Notification Worksheets1989-12-26026 December 1989 Event Notification Worksheets Information Notice 1989-88, Recent NRC-Sponsored Testing of Motor-Operated Valves1989-12-26026 December 1989 Recent NRC-Sponsored Testing of Motor-Operated Valves Information Notice 1989-87, Disabling of Emergency Diesel Generators by Their Neutral Ground-Fault Protection Circuitry1989-12-19019 December 1989 Disabling of Emergency Diesel Generators by Their Neutral Ground-Fault Protection Circuitry Information Notice 1989-85, Epa'S Interim Final Rule on Medical Waste Tracking and Management1989-12-15015 December 1989 Epa'S Interim Final Rule on Medical Waste Tracking and Management Information Notice 1989-86, Type Hk Circuit Breakers Missing Close Latch Anti-Shock Springs1989-12-15015 December 1989 Type Hk Circuit Breakers Missing Close Latch Anti-Shock Springs 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 Sustained Degraded Voltage on the Offsite Electrical Grid and Loss of Other Generating Stations as a Result of a Plant Trip 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 Sustained Degraded Voltage on the Offsite Electrical Grid and Loss of Other Generating Stations As a Result of a Plant Trip Information Notice 1989-82, Recent Safety-Related Incidents at Large Irradiators1989-12-0707 December 1989 Recent Safety-Related Incidents at Large Irradiators Information Notice 1989-59, Suppliers of Potentially Misrepresented Fasteners1989-12-0606 December 1989 Suppliers of Potentially Misrepresented Fasteners Information Notice 1989-81, Inadequate Control of Temporary Modifications to Safety-Related Systems1989-12-0606 December 1989 Inadequate Control of Temporary Modifications to Safety-Related Systems Information Notice 1989-80, Potential for Water Hammer, Thermal Strafication, and Steam Binding in High-Pressure Coolant Injection Piping1989-12-0101 December 1989 Potential for Water Hammer, Thermal Strafication, and Steam Binding in High-Pressure Coolant Injection Piping Information Notice 1989-79, Degraded Coatings and Corrosion of Steel Containment Vessels1989-12-0101 December 1989 Degraded Coatings and Corrosion of Steel Containment Vessels Information Notice 1989-56, Questionable Certification of Material Supplied to the Defense Dept. by Nuclear Suppliers1989-11-22022 November 1989 Questionable Certification of Material Supplied to the Defense Dept. by Nuclear Suppliers Information Notice 1989-56, Questionable Certification of Material Supplied to the Defense Dept. By Nuclear Suppliers1989-11-22022 November 1989 Questionable Certification of Material Supplied to the Defense Dept. By Nuclear Suppliers Information Notice 1989-78, Failure of Packing Nuts on One-Inch Uranium Hexafluoride Cylinder Valves1989-11-22022 November 1989 Failure of Packing Nuts on One-Inch Uranium Hexafluoride Cylinder Valves Information Notice 1989-76, Biofouling Agent: Zebra Mussel1989-11-21021 November 1989 Biofouling Agent: Zebra Mussel Information Notice 1989-77, Debris in Containment Emergency Sumps and Incorrect Screen Configurations1989-11-21021 November 1989 Debris in Containment Emergency Sumps and Incorrect Screen Configurations Information Notice 1989-75, Falsification of Welder Qualifications for Contractor Employees1989-11-20020 November 1989 Falsification of Welder Qualifications for Contractor Employees Information Notice 1989-74, Clarification of Transportation Requirements Applicable to Return of Spent Radiopharmacy Dosages from Users to Suppliers1989-11-0707 November 1989 Clarification of Transportation Requirements Applicable to Return of Spent Radiopharmacy Dosages from Users to Suppliers Information Notice 1989-73, Potential Overpressurization of Low Pressure Systems1989-11-0101 November 1989 Potential Overpressurization of Low Pressure Systems Information Notice 1989-72, Failure of Licensed Senior Operators to Classify Emergency Events Properly1989-10-24024 October 1989 Failure of Licensed Senior Operators to Classify Emergency Events Properly Information Notice 1989-71, Diversion of the Residual Heat Removal Pump Seal Cooling Water Flow During Recirculation Operation Following a Loss-Of-Coolant Accident1989-10-19019 October 1989 Diversion of the Residual Heat Removal Pump Seal Cooling Water Flow During Recirculation Operation Following a Loss-Of-Coolant Accident Information Notice 1989-70, Possible Indications of Misrepresented Vendor Products1989-10-11011 October 1989 Possible Indications of Misrepresented Vendor Products Information Notice 1989-68, Evaluation of Instrument Setpoints During Modifications1989-09-25025 September 1989 Evaluation of Instrument Setpoints During Modifications Information Notice 1989-67, Loss of Residual Heat Removal Caused by Accumulator Nitrogen Injection1989-09-13013 September 1989 Loss of Residual Heat Removal Caused by Accumulator Nitrogen Injection Information Notice 1989-66, Qualification Life of Solenoid Valves1989-09-11011 September 1989 Qualification Life of Solenoid Valves Information Notice 1989-65, Potential for Stress Corrosion Cracking in Steam Generator Tube Plugs Supplied by Babcock and Wilcox1989-09-0808 September 1989 Potential for Stress Corrosion Cracking in Steam Generator Tube Plugs Supplied by Babcock and Wilcox Information Notice 1989-64, Electrical Bus Bar Failures1989-09-0707 September 1989 Electrical Bus Bar Failures Information Notice 1989-63, Possible Submergence of Electrical Circuits Located Above the Flood Level Because of Water Intrusion and Lack of Drainage1989-09-0505 September 1989 Possible Submergence of Electrical Circuits Located Above the Flood Level Because of Water Intrusion and Lack of Drainage Information Notice 1989-62, Malfunction of Borg-Warner Pressure Seal Bonnet Check Valves Caused by Vertical Misalignment of Disk1989-08-31031 August 1989 Malfunction of Borg-Warner Pressure Seal Bonnet Check Valves Caused by Vertical Misalignment of Disk Information Notice 1989-61, Failure of Borg-Warner Gate Valves to Close Against Differential Pressure1989-08-30030 August 1989 Failure of Borg-Warner Gate Valves to Close Against Differential Pressure 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 Disablement of Turbine-Driven Auxiliary Feedwater Pump Due to Closure of One of the Parallel Steam Supply Valves 1990-03-09
[Table view] |
SSINS NO: 6870 tAccession No.: 791025O4X5UNITED STATESNUCLEAR REGULATORY COMMISSIONOFFICE OF INSPECTION AND ENFORCEMENTWASHINGTON, D.C. 20555November 16, 1979IE Information Notice No. 79-28OVERLOADING OF STRUCTURAL ELEMENTS DUE TO PIPE SUPPORT LOADS
Description of Circumstances
- Recently, the NRC was informed that, in the course of the inspections pursuantto IE Bulletin No. 79-02 and 79-14 by the Portland General Electric Co. (PGE) atthe Trojan Nuclear Plant, some walls were found which did not have adequatestructural strength to sustain the required support reactions. Bechtel Corporationwas the Architect Enaineer for the plant. These structural inadequacies werereported to be attributable to two deficiencies:1) Apparent lack of a final check of certain pipe support locations and reactionsto ensure that the supporting structural elements possessed adequatestructural integrity to sustain the required loads.2) Inadeouate design criteria for the reactions from supports anchored intothe face of concrete block walls; e.g., relying on the combined strengthof double concrete block walls without positive connection between thetwo walls by means other than the bond provided by a layer of grout betweenthem.The NRC is currently pursuing these issues in detail for the Trojan Nuclear Plantto determine the extent of these deficiencies and the generic implications forother Bechtel facilities.This Information Notice is provided as an early notification of a possible signif-icant matter. It is expected that recipients will review the information forpossible applicability to their facilities and the actions being performed underIE Bulletin No. 79-02. Specific action is being requested relating to the adequacyof attachments to concrete block walls under IE Bulletin No. 79-02, Revision 2,item 5.c. No specific actions are requested in response to this Information Notice.If NRC evaluations so indicate, further licensee actions may be requested orrequired. If you have any questions regarding this matter, please contact theDirector of the appropriate NRC Regional Office.No written response to this IE Information Notice is required.
IE Information Notice No. 79-28November 16, 1979RECENTLY ISSUEDIE INFORMATION NOTICESEnclosureInformationNotice No.SubjectDateIssuedIssued To79-2779-12A79-2679-2579-24Steam Generator Tube 11/16!:Ruptures At Two PWRFacilitiesAttempted Damage To New 11/9/7'Fuel AssembliesBreach of Containment 11/5/79IntegrityReactor Trips At Turkey 10/1/79Point Units 3 And 4Overoressurization Of 10/1/79Containment Of A PWR PlantAfter A Main Steam LineBreakEmergency Diesel Generator 9/26/79Lube Oil CoolersQualification of Control 9/14/7iSystemsTransportation and Commercial 9/7/79Burial of Radioactive Material79 All Power reactor facilitiesholding OLs and CPsAll Fuel Facilities,research reactors, andDower reactors with anOL or CPAll power reactor facilitiesholding OLs and CPsAll nower facilities withan OL or a CPAll power reactor facilitieswith a CPAll power reactorfacilities holding OLsand CPs79-2379-2279-219 All Dower reactorfacilities withoperating licensesand construction permits.All power and researchreactors with OL'sAll Holders of ReactornLs and CPs and ProductionLicensees with Licensednperators79-20(Rev. 1)NRC Enforcement PolicyNRC Licensed IndividualsNRC Enforcement PolicyNRC Licensed Individualsc9/7/7979-208/14/79 All Holders of ReactorOLs and CPs and ProductionLicensees with LicensedOnerators
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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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