Problems With Criticality Alarm Components/SystemsML031190217 |
Person / Time |
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Site: |
Beaver Valley, Millstone, Hatch, Monticello, Calvert Cliffs, Dresden, Davis Besse, Peach Bottom, Browns Ferry, Salem, Oconee, Mcguire, Nine Mile Point, Palisades, Palo Verde, Perry, Indian Point, Fermi, Kewaunee, Catawba, Harris, Wolf Creek, Saint Lucie, Point Beach, Oyster Creek, Watts Bar, Hope Creek, Grand Gulf, Cooper, Sequoyah, Byron, Pilgrim, Arkansas Nuclear, Three Mile Island, Braidwood, Susquehanna, Summer, Prairie Island, Columbia, Seabrook, Brunswick, Surry, Limerick, North Anna, Turkey Point, River Bend, Vermont Yankee, Crystal River, Haddam Neck, Ginna, Diablo Canyon, Callaway, Vogtle, Waterford, Duane Arnold, Farley, Robinson, Clinton, South Texas, San Onofre, Cook, Comanche Peak, Yankee Rowe, Maine Yankee, Quad Cities, Humboldt Bay, La Crosse, Big Rock Point, Rancho Seco, Zion, Midland, Bellefonte, Fort Calhoun, FitzPatrick, McGuire, LaSalle, Fort Saint Vrain, Shoreham, Satsop, Trojan, Atlantic Nuclear Power Plant ![Entergy icon.png](/w/images/7/79/Entergy_icon.png) |
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Issue date: |
12/26/1991 |
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Revision: |
0 |
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From: |
Cunningham R E NRC/NMSS/IMNS |
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To: |
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References |
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IN-91-084, NUDOCS 9112190113 |
Download: ML031190217 (5) |
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Similar Documents at Beaver Valley, Millstone, Hatch, Monticello, Calvert Cliffs, Dresden, Davis Besse, Peach Bottom, Browns Ferry, Salem, Oconee, Mcguire, Nine Mile Point, Palisades, Palo Verde, Perry, Indian Point, Fermi, Kewaunee, Catawba, Harris, Wolf Creek, Saint Lucie, Point Beach, Oyster Creek, Watts Bar, Hope Creek, Grand Gulf, Cooper, Sequoyah, Byron, Pilgrim, Arkansas Nuclear, Three Mile Island, Braidwood, Susquehanna, Summer, Prairie Island, Columbia, Seabrook, Brunswick, Surry, Limerick, North Anna, Turkey Point, River Bend, Vermont Yankee, Crystal River, Haddam Neck, Ginna, Diablo Canyon, Callaway, Vogtle, Waterford, Duane Arnold, Farley, Robinson, Clinton, South Texas, San Onofre, Cook, Comanche Peak, Yankee Rowe, Maine Yankee, Quad Cities, Humboldt Bay, La Crosse, Big Rock Point, Rancho Seco, Zion, Midland, Bellefonte, Fort Calhoun, FitzPatrick, McGuire, LaSalle, Fort Saint Vrain, Shoreham, Satsop, Trojan, Atlantic Nuclear Power Plant |
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Category:NRC Information Notice
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Appendix VI: NRC FOIA Responses (B-51 Through B-53); Turkey Point Event Report; NRC Information Notice 2010-12: Containment Liner Cor Information Notice 2010-12, Intervenors' Fifth Motion to Amend And/Or Supplement Proposed Contention No. 5 (Shield Building Cracking). Appendix VI: NRC FOIA Responses (B-51 Through B-53); Turkey Point Event Report; NRC Information Notic2012-08-17017 August 2012 Intervenors' Fifth Motion to Amend And/Or Supplement Proposed Contention No. 5 (Shield Building Cracking). 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Mclaughlin on NRC, Regarding NRC Information Notice 2006-13: Groundwater Contamination2006-07-13013 July 2006 E-mail from M. Mclaughlin on NRC, Regarding NRC Information Notice 2006-13: Groundwater Contamination 2020-09-03 The following query condition could not be considered due to this wiki's restrictions on query size or depth: <code> [[:Beaver Valley]] OR [[:Millstone]] OR [[:Hatch]] OR [[:Monticello]] OR [[:Calvert Cliffs]] OR [[:Dresden]] OR [[:Davis Besse]] OR [[:Peach Bottom]] OR [[:Browns Ferry]] OR [[:Salem]] OR [[:Oconee]] OR [[:Mcguire]] OR [[:Nine Mile Point]] OR [[:Palisades]] OR [[:Palo Verde]] OR [[:Perry]] OR [[:Indian Point]] OR [[:Fermi]] OR [[:Kewaunee]] OR [[:Catawba]] OR [[:Harris]] OR [[:Wolf Creek]] OR [[:Saint Lucie]] OR [[:Point Beach]] OR [[:Oyster Creek]] OR [[:Watts Bar]] OR [[:Hope Creek]] OR [[:Grand Gulf]] OR [[:Cooper]] OR [[:Sequoyah]] OR [[:Byron]] OR [[:Pilgrim]] OR [[:Arkansas Nuclear]] OR [[:Three Mile Island]] OR [[:Braidwood]] OR [[:Susquehanna]] OR [[:Summer]] OR [[:Prairie Island]] OR [[:Columbia]] OR [[:Seabrook]] OR [[:Brunswick]] OR [[:Surry]] OR [[:Limerick]] OR [[:North Anna]] OR [[:Turkey Point]] OR [[:River Bend]] OR [[:Vermont Yankee]] OR [[:Crystal River]] OR [[:Haddam Neck]] OR [[:Ginna]] OR [[:Diablo Canyon]] OR [[:Callaway]] OR [[:Vogtle]] OR [[:Waterford]] OR [[:Duane Arnold]] OR [[:Farley]] OR [[:Robinson]] OR [[:Clinton]] OR [[:South Texas]] OR [[:San Onofre]] OR [[:Cook]] OR [[:Comanche Peak]] OR [[:Yankee Rowe]] OR [[:Maine Yankee]] OR [[:Quad Cities]] OR [[:Humboldt Bay]] OR [[:La Crosse]] OR [[:Big Rock Point]] OR [[:Rancho Seco]] OR [[:Zion]] OR [[:Midland]] OR [[:Bellefonte]] OR [[:Fort Calhoun]] OR [[:FitzPatrick]] OR [[:McGuire]] OR [[:LaSalle]] OR [[:Fort Saint Vrain]] OR [[:Shoreham]] OR [[:Satsop]] OR [[:Trojan]] OR [[:Atlantic Nuclear Power Plant]] </code>.
[Table view]The following query condition could not be considered due to this wiki's restrictions on query size or depth: <code> [[:Beaver Valley]] OR [[:Millstone]] OR [[:Hatch]] OR [[:Monticello]] OR [[:Calvert Cliffs]] OR [[:Dresden]] OR [[:Davis Besse]] OR [[:Peach Bottom]] OR [[:Browns Ferry]] OR [[:Salem]] OR [[:Oconee]] OR [[:Mcguire]] OR [[:Nine Mile Point]] OR [[:Palisades]] OR [[:Palo Verde]] OR [[:Perry]] OR [[:Indian Point]] OR [[:Fermi]] OR [[:Kewaunee]] OR [[:Catawba]] OR [[:Harris]] OR [[:Wolf Creek]] OR [[:Saint Lucie]] OR [[:Point Beach]] OR [[:Oyster Creek]] OR [[:Watts Bar]] OR [[:Hope Creek]] OR [[:Grand Gulf]] OR [[:Cooper]] OR [[:Sequoyah]] OR [[:Byron]] OR [[:Pilgrim]] OR [[:Arkansas Nuclear]] OR [[:Three Mile Island]] OR [[:Braidwood]] OR [[:Susquehanna]] OR [[:Summer]] OR [[:Prairie Island]] OR [[:Columbia]] OR [[:Seabrook]] OR [[:Brunswick]] OR [[:Surry]] OR [[:Limerick]] OR [[:North Anna]] OR [[:Turkey Point]] OR [[:River Bend]] OR [[:Vermont Yankee]] OR [[:Crystal River]] OR [[:Haddam Neck]] OR [[:Ginna]] OR [[:Diablo Canyon]] OR [[:Callaway]] OR [[:Vogtle]] OR [[:Waterford]] OR [[:Duane Arnold]] OR [[:Farley]] OR [[:Robinson]] OR [[:Clinton]] OR [[:South Texas]] OR [[:San Onofre]] OR [[:Cook]] OR [[:Comanche Peak]] OR [[:Yankee Rowe]] OR [[:Maine Yankee]] OR [[:Quad Cities]] OR [[:Humboldt Bay]] OR [[:La Crosse]] OR [[:Big Rock Point]] OR [[:Rancho Seco]] OR [[:Zion]] OR [[:Midland]] OR [[:Bellefonte]] OR [[:Fort Calhoun]] OR [[:FitzPatrick]] OR [[:McGuire]] OR [[:LaSalle]] OR [[:Fort Saint Vrain]] OR [[:Shoreham]] OR [[:Satsop]] OR [[:Trojan]] OR [[:Atlantic Nuclear Power Plant]] </code>. |
UNITED STATESNUCLEAR REGULATORY COMMISSIONOFFICE OF NUCLEAR MATERIAL SAFETY AND SAFEGUARDSWASHINGTON, D.C. 20555December 26, 1991NRC INFORMATION NOTICE 91-84: PROBLEMS WITH CRITICALITY ALARMCOMPONENTS/SYSTEMS
Addressees
AllNuclear Regulatory Commission (NRC) fuel cycle licensees, interim spentfuel storage licensees, and critical mass licensees.
Purpose
NRC is issuing this notice to remind licensees of the importance of adequatereviews of plant modification, installation, maintenance, and response actions,to ensure that required criticality alarm systems meet their intended purpose.It is expected that recipients will review this information for applicabilityto their facilities, distribute it to responsible staff, and consider actions,-as appropriate, to avoid similar problems. However, suggestions contained inthis information notice do not constitute any new NRC requirements, and nowritten response is required.
Description of Circumstances
The following cases are recent events involving problems with licensee'scriticality alarm systems that have been reported to, or discovered by, NRC.Case 1: During a routine test of the criticality alarm system, a licenseediscovered that several of the site's audible alarms ("howlers") did notactuate. The licensee found that wiring to the alarms had been accidentallybroken while other electrical cables were being pulled through the cable runthat contained the criticality alarm wiring. The licensee's system providedindication, prior to the next scheduled test, that some of-the audible alarmshad been disabled.Case 2: Engineering drawings describing modifications at a licensed facilityspecified removal of "heat detectors (radiation)." The licensee's review ofthe modification package did not recognize that it included removal, ratherthan relocation, of criticality alarm system detectors. When the specifieddetectors were removed no alarm was generated at the system monitoring panel.Subsequent investigation disclosed that the alarm panel was wired in such away that, although a "failure" light was activated at an intermediate panel (anunmanned location), a "loss of power/loss of detector" signal was not generatedat the monitoring panel in a normally manned area.9112190113 R I t I c)VI0020980,F -_
IIIIN 91-84 aDecember 26, 1991 Case 3: A licensee experienced an activation of the plant's criticality alarmsystem, but no criticality accident had actually occurred. Investigationfound that the alarm had been generated when the uninterruptable powersupply (UPS) circuit that powered the alarm system was turned off by means ofa switch in the facility's main computer room. The switch had been backfittedto the system to allow for cutoff of all power to the computer room inemergency situations and was not intended to affect power to the criticalityalarm system. The modification review associated with the addition of theswitch did not identify the fact that the planned location was between the UPSsource and the primary criticality alarm system circuit.Case 4: During an electrical storm, the criticality safety alarms at onlythe Waste Treatment Facility (WTF) sounded because of a momentary powerinterruption. Personnel in the WTF did not evacuate, but instead calledSecurity, who then notified Radiation Control and Electrical Shop personnel.Electricians then entered the WTF to silence the alarms before obtainingclearance from Radiation Control. An investigation of the incident determinedthat the personnel in the WTF did not evacuate in accordance with proceduresrequired by 10 CFR 70.24, and that the electricians made an uncontrolled entryinto the WTF to silence the alarms prior to getting clearance from RadiationControl.Case 5: During a routine NRC inspection of a licensee's criticality accidentmonitoring system, the inspector found that: (1) since 1970, no evaluation hadbeen performed to demonstrate that the system provided adequate monitoringcoverage for facility modifications or additions where large quantities ofspecial nuclear material were being stored or used; (2) the licensee did nothave a system to ensure that such technical evaluations were performed anddocumented; and (3) no program existed to limit the storage of interveningshielding materials between the neutron criticality detectors and the monitoredareas.Case 6: During maintenance, a licensee discovered that under design basis'accident conditions (greater than 1 E+15 fissions) its criticality alarmsystem might not function as intended. The alarm system used Geiger-Muellerdetectors that could become electronically saturated in a high radiationfield and not function. As a result, the licensee declared an Unusual Eventand discontinued transfers of fissile materials within the facility. Thelicensee terminated the Unusual Event after connecting anti-saturationcircuitry to the criticality alarm system.DiscussionAll licensees are reminded of the importance of maintaining operablecriticality detection, monitoring, and annunciation capabilities, as well asprocedures and training for response to criticality alarms. As the forementionedcases indicate, a lack of detailed knowledge of the system's configuration androuting of detector or power circuits can result in failure to recognize thepossible impact of installation, modification, or maintenance activities onthe criticality alarm system. Physical and electrical modifications have theS 4 IIN 91-84December 26 1991 clear potential to degrade or disable all or part of this important safetysystem. Licensees should ensure that they have established a comprehensivetesting program, both on a routine basis and after maintenance and modificationactivities, and a method of continuously monitoring the integrity ofcriticality alarm system lines and components, through line supervision,to preclude failure of criticality alarm system capabilities. These activitiesshould include clearly written implementing procedures, and a training programto ensure appropriate implementation.This information notice requires no specific action or written response. Ifyou have questions about the information in this notice, please contact one ofthe technical contacts listed below or the appropriate regional office.Richard E. Cunningham, DirectorDivision of Industrial andMedical Nuclear Safety, NMSSTechnical contacts: Scott Pennington, NMSS(301) 504-2693Gerald Troup, RII(404) 331-5566
Attachments:
1. List of Recently Issued NMSS Information Notices2. List of Recently Issued NRC Information Notices K>~i 4 .Attachment 1IN 91-84December 26, 1991 LIST OF RECENTLY ISSUEDNMSS INFORMATION NOTICESIntormation Date otNotice No. Subject Issuance Issued to91-7191-6691-6591-6091-4991-4491-3991-35Training and Supervision 11/12/91 All NRC medical licensees.of Individuals Supervisedby an Authorized User(1) Erroneous Data in 10/18/91 All fuel cycle licensees,"Nuclear Safety Guide, critical mass licensees,TID-7016, Revision 2," interim spent fuel storage(NUREG/CR-0095, ORNL/ licensees, and all holdersNUREG/CSD-6 (1978)) and of operating licenses or(2) Thermal Scattering construction permits forData Limitation in the test, research, and nuclearCross-Section Sets Provided power reactors.with the KENO and SCALE CodesEmergency Access to 10/16/91 All NRC licensees.Low-Level RadioactiveWaste Disposal FacilitiesFalse Alarms of Alarm 09/24/91 All Nuclear Regulatory Com-Ratemeters Because of mission (NRC) licenseesRadiofrequency Interference authorized to use sealedsources for industrialradiographyEnforcement of Safety 08/15/91 All Nuclear Regulatory Com-Requirements for Radiographers mission (NRC) licenseesauthorized to use sealedsources for industrial radi-ography.Improper Control of Chemicals 07/07/91 All nuclear fuel facilities.in Nuclear Fuel FabricationCompliance with 10 CFR 06/17/91 All Nuclear RegulatoryPart 21, "Reporting of Defects Commission (NRC) materialand Noncompliance" licensees.Labeling Requirements for 06/07/91 All U.S. Nuclear RegulatoryTransporting Multi-Hazard Commission (NRC) licensees.Radioactive Materials lAttachment 2IN 91-84December 26, 1991 LIST OF RECENTLY ISSUEDNRC INFORMATION NOTICESInformation Date ofNotice No. Subject Issuance Issued to91-8391-18,Supp. 191-8291-8191-8091-7988-92,Supp. 191-7890-57,Supp. 1Solenoid-Operated ValveFailures Resulted inTurbine OverspeedHigh-Energy Piping FailuresCaused by Wall ThinningProblems with Diaphragmsin Safety-Related TanksSwitchyard Problems thatContribute to Loss ofOffsite PowerFailure of AnchorHead Threads on Post-Tensioning System DuringSurveillance InspectionDeficiencies in theProcedures for Instal-ling Thermo-Lag FireBarrier MaterialsPotential for SpentFuel Pool DraindownStatus Indication ofControl Power forCircuit Breakers Usedin Safety-Related Appli-cationsSubstandard, Refur-bished Potter & Brum-field Relays Repre-sented as New12/20/9112/18/9112/18/9112/16/9112/11/9112/06/9111/29/9111/28/9111/27/91All holders of OLs or CPsfor nuclear power reactors.All holders of OLs or CPsfor nuclear power reactors.All holders of OLs or CPsfor nuclear power reactors.All holders of OLs or CPsfor nuclear power reactors.All holders of OLs or CPsfor nuclear power reactors.All holders of OLs or CPsfor nuclear power reactors.All holders of OLs or CPsfor nuclear power reactors.All holders of OLs or CPsfor nuclear power reactors.All holders of OLs or CPsfor nuclear power reactors.OL = Operating LicenseCP = Construction Permit
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list | - Information Notice 1991-01, Supplier of Misrepresented Resistors (4 January 1991, Topic: Fitness for Duty)
- Information Notice 1991-02, Brachytherapy Source Management (7 January 1991, Topic: Fitness for Duty, Brachytherapy)
- Information Notice 1991-03, Management of Wastes Contaminated with Radioactive Materials (Red Bag Waste & Ordinary Trash) (7 January 1991, Topic: Fitness for Duty, Brachytherapy)
- Information Notice 1991-04, Reactor Scram Following Control Rod Withdrawal Associated with Low Power Turbine Testing (28 January 1991, Topic: Fitness for Duty)
- Information Notice 1991-05, Intergranular Stress Corrosion Cracking in Pressurized Water Reactor Safety Injection Accumulator Nozzles (30 January 1991, Topic: Fitness for Duty, Hydrostatic, Liquid penetrant)
- Information Notice 1991-06, Lock-up of Emergency Diesel Generator and Load Sequencer Control Circuits Preventing Restart of Tripped Emergency Diesel Generator (31 January 1991, Topic: Fitness for Duty, Brachytherapy)
- Information Notice 1991-07, Maintenance Deficiency Associated with General Electric Horizontal Custom 8000 Induction Motors (4 February 1991, Topic: Fitness for Duty, Brachytherapy)
- Information Notice 1991-08, Medical Examinations for Licensed Operators (5 February 1991, Topic: Brachytherapy)
- Information Notice 1991-09, Counterfeiting of Crane Valves (25 September 2007)
- Information Notice 1991-10, Summary of Semiannual Program Performance Reports on Fithess-For-Duty (FFD) in the Nuclear Industry (12 February 1991)
- Information Notice 1991-12, Potential Loss of Net Positive Suction Head (NPSH) of Standby Liquid Control System Pumps (15 February 1991)
- Information Notice 1991-13, Inadequate Testing of Emergency Diesel Generators (Edgs) (4 March 1991)
- Information Notice 1991-13, Inadequate Testing of Emergency Diesel Generators (EDGs) (4 March 1991)
- Information Notice 1991-14, Recent Safety-Related Incidents at Large Irradiators (5 March 1991, Topic: Fitness for Duty, Coatings, Incorporated by reference, Brachytherapy, Uranium Hexafluoride)
- Information Notice 1991-15, Incorrect Configuration of Breaker Operating Springs in General Electric AK-Series Metal-Clad Circuit Breakers (6 March 1991)
- Information Notice 1991-16, Unmonitored Release Pathways from Slightly Contaminated Recycle and Recirculation Water Systems at a Fuel Facility (6 March 1991, Topic: Fitness for Duty, Brachytherapy)
- Information Notice 1991-17, Fire Safety of Temporary Installation or Services (11 March 1991)
- Information Notice 1991-18, High-Energy Piping Failures Caused by Wall Thinning (18 December 1991)
- Information Notice 1991-19, Steam Generator Feedwater Distribution Piping Damage (12 March 1991)
- Information Notice 1991-20, Electrical Wire Insulation Degradation Caused Failure in a Safety-Related Motor Control Center (19 March 1991)
- Information Notice 1991-21, Inadequate Quality Assurance Program of Vendor Supplying Safety-Related Equipment (19 March 1991)
- Information Notice 1991-22, Four Plant Outage Events Involving Loss of AC Power or Coolant Spills (19 March 1991)
- Information Notice 1991-23, Accidental Radiation Overexposures to Personnel Due to Industrial Radiography Accessory Equipment Malfunctions (26 March 1991, Topic: Fitness for Duty, Brachytherapy)
- Information Notice 1991-24, Recent Operating Experience Involving Reactor Operation Without a Licensed Reactor Operator or Senior Reactor Operator Present in the Control Room (26 March 1991)
- Information Notice 1991-25, Commercial-Grade Structural Framing Components Supplied As Nuclear Safety-Related Equipment (1 April 1991)
- Information Notice 1991-25, Commercial-Grade Structural Framing Components Supplied as Nuclear Safety-Related Equipment (1 April 1991)
- Information Notice 1991-26, Potential Nonconservative Errors in the Working Format Hansen-Roach Cross-Section Set Provided with Keno and Scale Codes (2 April 1991, Topic: Fitness for Duty, Brachytherapy)
- Information Notice 1991-27, Incorrect Rotation of Positive Displacement Pump (10 April 1991)
- Information Notice 1991-28, Cracking in Feedwater System Piping (15 April 1991)
- Information Notice 1991-29, Deficiencies Identifie During Electrical Distribution System Functional Inspections (15 April 1991)
- Information Notice 1991-30, Inadequate Calibration of Thermoluminescent Dosimeters Utilized to Monitor Extremity Dose at Uranium Processing and Fabrication Facilities (23 April 1991, Topic: Brachytherapy, Uranium Hexafluoride)
- Information Notice 1991-31, Nonconforming Magnaflux Magnetic Particle (14AM) Prepared Bath (9 May 1991)
- Information Notice 1991-32, Possible Flaws in Certain Piping Systems Fabricated by Associated Piping and Engineering (15 May 1991, Topic: Hot Short, Liquid penetrant)
- Information Notice 1991-33, Reactor Safety Information for States During Exercises and Emergencies (31 May 1991)
- Information Notice 1991-34, Potential Problems in Identifying Causes of Emergency Diesel Generator Malfunctions (3 June 1991)
- Information Notice 1991-35, Labeling Requirements for Transporting Multi-Hazard Radioactive Materials (7 June 1991)
- Information Notice 1991-36, Nuclear Plant Staff Working Hours (10 June 1991)
- Information Notice 1991-37, Compressed Gas Cylinder Missile Hazards (10 June 1991)
- Information Notice 1991-38, Thermal Stratification in Feedwater System Piping (13 June 1991, Topic: Unanalyzed Condition)
- Information Notice 1991-39, Compliance with 10 CFR Part 21, Reporting of Defects and Noncompliance. (17 June 1991)
- Information Notice 1991-40, Contamination of Nonradioactive System and Resulting Possibility for Unmonitored, Uncontrolled Release to the Environment (19 June 1991)
- Information Notice 1991-41, Potential Problems with the Use of Freeze Seals (27 June 1991)
- Information Notice 1991-42, Plant Outage Events Involving Poor Coordination Between Operations and Maintenance Personnel During Valve Testing and Manipulations (27 June 1991)
- Information Notice 1991-43, Recent Incidents Involving Rapid Increases in Primary-To-Secondary Leak Rate (5 July 1991, Topic: Grab sample)
- Information Notice 1991-45, Possible Malfunction of Westinghouse Ard, Bfd, & Nbfd Relays, & A200 DC & DPC 250 Magnetic Contactors (5 July 1991)
- Information Notice 1991-46, Degradation of Emergency Diesel Generator Fuel Oil Delivery Systems (18 July 1991)
- Information Notice 1991-47, Failure of Thermo-Lag Fire Barrier Material to Pass Fire Endurance Test (6 August 1991, Topic: Safe Shutdown, Fire Barrier)
- Information Notice 1991-48, False Certificates of Conformance Provided by Westinghouse Electric Supply Company for Refurbished Commercial-Grade Circuit Breakers (9 August 1991, Topic: Fire Barrier)
- Information Notice 1991-49, Enforcement of Safety Requirements for Radiographers (15 August 1991, Topic: High Radiation Area, Fire Barrier)
- Information Notice 1991-50, a Review of Water Hammer Events After 1985 (20 August 1991, Topic: Fire Barrier)
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