Slower-than-Expected Rod-drop Times ML031150138 Person / Time 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 , 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 , 05000000 , Zimmer , Fort Saint Vrain , Shoreham , Satsop , Trojan , Atlantic Nuclear Power Plant , Crane Issue date:
07/14/1988 From:
Rossi C Office of Nuclear Reactor Regulation To:
References IN-88-047 , NUDOCS 8807080366Download: ML031150138 (7)
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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 ,
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 ,
05000000 ,
Zimmer ,
Fort Saint Vrain ,
Shoreham ,
Satsop ,
Trojan ,
Atlantic Nuclear Power Plant ,
Crane Category:NRC Information Notice
[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 [[: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 [[:05000000]] OR [[:Zimmer]] OR [[:Fort Saint Vrain]] OR [[:Shoreham]] OR [[:Satsop]] OR [[:Trojan]] OR [[:Atlantic Nuclear Power Plant]] OR [[:Crane]] </code>.
Contents
1 NUCLEAR REGULATORY COMMISSION 2 WASHINGTON, D.C. 20555 3 Addressees 4 Purpose 5 Description of Circumstances
5.1 The licensee discovered 5.2 The new methodology is a more realistic 5.3 The licensee found it necessary to 5.4 The licensee subsequently submitted a reauest 5.5 Division of Operational Events Assessment 5.6 Technical Contact: 5.7 N. Prasad Kadambi, NRR 5.8 July 14, 1988 LIST OF RECENTLY ISSUED 5.9 Licensee Report of 5.10 Circuit Breakers 5.11 Relay and Circuit 5.12 Mechanical Binding of 5.13 Solenoid Valve Problems 5.14 Due to Loose Charging 5.15 Physical Protection 5.16 Developing Operator 5.17 All holders of OLs 5.18 All holders of OLs 5.19 All holders of OLs 5.20 All holders of OLs 5.21 All holders of OLs 5.22 All holders of OLs 5.23 All holders of OLs 5.24 All holders of OLs 5.25 All holders of OLs 5.26 All holders of OLs 5.27 LaSalle Unit 2 Loss of 5.28 Power Oscillation Event 5.29 Trip Attachment on General 5.30 Flow Blockage of Cooling 5.31 Charles E. Rossi, Director 5.32 Office of Nuclear Reactor Regulation 5.33 Technical Contact: 5.34 N. Prasad Kadambi, NRR 5.35 List of Recently Issued NRC Information Notices 5.36 Charles E. Rossi, Director 5.37 Office of Nuclear Reactor Regulation 5.38 Technical Contact: 5.39 N. Prasad Kadambi, NRR 5.40 List of Recently Issued NRC Information Notices 5.41 Charles E. Rossi, Director 5.42 Office of Nuclear Reactor Regulation 5.43 Technical Contact: 5.44 N. Prasad Kadambi, NRR 5.45 List of Recently Issued NRC Information Notices 5.46 Charles E. Rossi, Director 5.47 Technical Contact: 5.48 N. Prasad Kadambi, NRR 5.49 List of Recently Issued NRC Information Notices
NUCLEAR REGULATORY COMMISSION OFFICE OF NUCLEAR REACTOR REGULATION
WASHINGTON, D.C. 20555 July 14, 1988 NRC INFORMATION NOTICE NO. 88-47: SLOWER-THAN-EXPECTED ROD-DROP TIMES
Addressees All holders of operating licenses or construction permits for pressurized-water
reactors.
Purpose This information notice is being provided to alert addressees to a potential
problem regarding slower-than-expected rod drop times.
It is expected that recipients will review the information for applicability to their facilities
and consider actions, as appropriate, to avoid similar problems. However, suggestions contained in this information notice do not constitute NRC require- ments; therefore, no specific action or written response is required.
Description of Circumstances In a letter dated May 5, 1988, the licensee of Arkansas Nuclear One Unit 2 (ANO-2) informed the NRC that they were unable to meet the Technical Specifi- cation regarding maximum drop time for control rods .
The licensee discovered the problem as a result of a change in the methodology used for measuring rod- drop times.
The test was part of the startup physics testing after refueling.
The new test methodology requires the interruption of power to the rod drive
mechanisms for all rods simultaneously by means of the reactor trip breakers.
The previous methodology called for the interruption of power to each individu- al drive mechanism. Simultaneous interruption of power to all drive mechanisms
leads to a slower dissipation of stored energy in the holding coils, hence in- creasing the measured rod-drop time.
The new methodology is a more realistic representation of the safety function.
The licensee found it necessary to review all of the accident analyses in the Final Safety Analysis Report to
ensure continued conformance with the licensing basis.
Discussion:
The rod-drop test at ANO-2 showed that the maximum drop time was 3.2 seconds, although the Technical Specification required less than 3.0 seconds.
The staff
found that the actions taken by the licensee were acceptable for dealing with
the changes to the safety margins.
The licensee subsequently submitted a reauest to amend the Technical Specification on an emergency basis. Because problems
similar to that at ANO-4 may occur at other plants, the staff would like to
inform all licensees of this experience so that they may take appropriate
IN 88-47 July 14, 1988 action to avoid requesting amendments on an emergency basis in regard to this
matter. The staff intends to incorporate the lessons learned from the ANO-2 experience in future reviews of accident analyses results, such as reload
reviews.
No specific action or written response is required by this information notice.
If you have any questions about this matter, please contact the technical
contact listed below or the Regional Administrator of the appropriate regional
office.
Charles 1.
rd1si, D rector
Division of Operational Events Assessment Office of Nuclear Reactor Regulation
Technical Contact: N. Prasad Kadambi, NRR (301) 492-1153 Attachment: List of Recently Issued NRC Information Notices
Attachment
IN 88-47
July 14, 1988 LIST OF RECENTLY ISSUED NRC INFORMATION NOTICES
Information
Date of
Notice No.
Subject
Issuance
Issued to
88-46
88-45
88-44
88-43
88-42
88-41
88-40
Licensee Report of Defective Refurbished
Circuit Breakers Problems In Protective
Relay and Circuit Breaker Coordination
Mechanical Binding of Spring Release Device
in Westinghouse Type
DS-416 Circuit Breakers
Solenoid Valve Problems Circuit Breaker Failures
Due to Loose Charging Spring Motor Mounting Bolts
Physical Protection Weaknesses Identified
Through Regulatory Ef- fectiveness Reviews (RERs)
Examiners' Handbook for
Developing Operator Licensing Examinations
7/8/88
7/7/88
6/24/88
6/23/88
6/23/88
6/22/88
6/22/88
6/15/88
6/15/88
6/14/88
All holders of OLs or CPs for nuclear
power reactors.
All holders of OLs or CPs for nuclear
power reactors.
All holders of OLs or CPk for nuclear
power tractors-.
All holders of OLs or CPs for nuclear
power reactors.
All holders of OLs or CPs for nuclear
power reactors.
All holders of OLs or CPs for nuclear
power reactors.
All holders of OLs or CPs for nuclear
power reactors.
All holders of OLs or CPs for BWRs .
All holders of OLs or CPs for nuclear
power reactors.
All holders of OLs or CPs for nuclear
power reactors.
88-39
88-38
LaSalle Unit 2 Loss of Recirculation Pumps With
Power Oscillation Event Failure of Undervoltage
Trip Attachment on General Electric Circuit Breakers
Flow Blockage of Cooling Water to Safety System
Components
88-37 OL = Operating License
CP = Construction Permit
i
IN 88-47 July 14, 1988 action to avoid requesting amendments on an emergency basis in regard to this
matter. The staff intends to incorporate the lessons learned from the ANO-2 experience in future reviews of accident analyses results, such as reload
reviews.
No specific action or written response is required by this information notice.
If you have any questions about this matter, please contact the technical
contact listed below or the Regional Administrator of the appropriate regional
office.
Charles E. Rossi, Director Division of Operational Events Assessment
Office of Nuclear Reactor Regulation Technical Contact: N. Prasad Kadambi, NRR (301) 492-1153 Attachment:
List of Recently Issued NRC Information Notices SEE PREVIOUS CONCURRENCES 4CO
psiIK0L- CHBerlinger
Oyj/6-/88
06/28/88
SELB:DEST:NRR *SAD/DEST:NRR PPMB:ARM FRosa
AThadani
TechEd
06/15/88
06/16/88
06/ /88
NPKadambi
06/28/88
MWHodges
06/15/88
IN 88-XX
June xx, 1988 action to avoid requesting amendments on an emergency basis in regard to this
matter. The staff intends to incorporate the lessons learned from the ANO-2 experience In future reviews of accident analyses results, such as reload
reviews.
No specific action or written response is required by this information notice.
If you have any questions about this matter, please contact the technical
contact listed below or the Regional Administrator of the appropriate regional
office.
Charles E. Rossi, Director Division of Operational Events Assessment
Office of Nuclear Reactor Regulation Technical Contact: N. Prasad Kadambi, NRR (301) 492-1153 Attachment:
List of Recently Issued NRC Information Notices SEE PREVIOUS CONCURRENCES apic
OGCB:DOEA:NRR
NPKadambi
06)4 /88 D/DOEA:NRR
C/OGCB:DOEA:NRR
CERossi
CHBer) inger
06/ /88
06/04'/88
AThadani
TechEd
06/16/88
06/d-/88
MWHodges
06/15/88
FRosa
06/15/88 D/DLsT: WM
LP
h..
)-. 5lAO
IN 88-XX
June xx, 1988 this matter. It is the intention of the staff to incorporate the lessons
learned from the ANO-2 experience in future reviews of accident analyses
results, such as when conducting reload reviews.
No specific action or written response is required by this information notice.
If you have any questions about this matter, please contact the technical
contact listed below or the Regional Administrator-of the appropriate regional
office.
Charles E. Rossi, Director Division of Operational Events Assessment
Office of Nuclear Reactor Regulation Technical Contact: N. Prasad Kadambi, NRR (301) 492-1153 Attachment:
List of Recently Issued NRC Information Notices OGCB:DOEA:NRR
NPKadambi
06/ /88 SRXB DEST:NRR
MWHodges
06//S-/88 SELB:DEST:NRR
FRosa
06//47/88 D/DOEA:NRR
CERossi
06/ /88A
SAD/DEST:
AThadani I
06/
88 C/OGCB: DOEA:NRR
CHBerlinger
06/ /88 PPMB:ARM
TechEd
06/ /88
IN 88-XX
June xx, 1988 this matter. I1 isr1tnr~hrbeiti
of Xhe stafft
incorporate the lessons
learned from the ANO-2 experience in future reviews of accident analyses
results, such as -wheft-eenductn
breload reviews.
No specific action or written response is required by this information notice.
If you have any questions about this matter, please contact the technical
contact listed below or the fegional Administrator of the appropriate regional
office./
Charles E. Rossi, Director Division of Operational Events Assessment
Office-of Nuclear Reactor Regulation
Technical Contact: N. Prasad Kadambi, NRR (301) 492-1153 Attachment:
List of Recently Issued NRC Information Notices OGCB:DOEA:NRR
NPKadambi
06/
/88 SRXB
T: NRR
MWHodges
06/(Sj/88 SELB:DEST:NRR
FRosa
06//,5/88 D/DOEA:NRR
CERoss
/
06/ /88 SAD/DEST:
ATha4ani
06/(V/88 C/OGCB:DOEA:NRR
CHBerlinger
06/ /88 PPMB:ARM
TechEd 4'WV'J'04
06/St/88
list Information Notice 1988-01, Safety Injection Pipe Failure 27 January 1988 Topic Unidentified leak Water hammer Information Notice 1988-03, Cracks in Shroud Support Access Hole Cover Welds 2 February 1988 Topic Intergranular Stress Corrosion Cracking Stolen Information Notice 1988-04, Inadequate Qualification and Documentation of Fire Barrier Penetration Seals 5 February 1988 Topic Fire Barrier Fire Watch Stolen Information Notice 1988-05, Fire in Annunciator Control Cabinets 12 February 1988 Topic Stolen Information Notice 1988-06, Foreign Objects in Steam Generators 29 February 1988 Topic Eddy Current Testing Stolen Information Notice 1988-07, Inadvertent Transfer of Licensed Material to Uncontrolled Locations 7 March 1988 Topic Stolen Overexposure Information Notice 1988-08, Chemical Reactions with Radioactive Waste Solification Agents 14 March 1988 Topic Process Control Program Stolen Information Notice 1988-09, Reduced Reliability of Steam-Driven Auxiliary Feedwater Pumps Caused by Instability of Woodward PG-PL Type Governors 18 March 1988 Topic Overspeed trip Overspeed Information Notice 1988-10, Memo of Understanding Between NRC and OSHA Relating to NRC-Licensed Facilities (53 FR 43950, October 31, 1988) 23 December 1988 Topic Fatality Overexposure Information Notice 1988-10, Memo of Understanding Between NRC and OSHA Relating to NRC-Licensed Facilities (53 Fr 43950, October 31, 1988) 23 December 1988 Topic Fatality Overexposure Information Notice 1988-10, Memorandum of Understanding Between NRC and Osha Relating to NRC-Licensed Facilities (53 Fr 43950, October 31, 1988. 23 December 1988 Topic Fatality Overexposure Information Notice 1988-11, Potential Loss of Motor Control Center And/Or Switchboard Function Due to Faulty Tie Bolts 7 April 1988 Information Notice 1988-12, Overgreasing of Electric Motor Bearings 12 April 1988 Topic Hardened grease Information Notice 1988-13, Water Hammer & Possible Piping Damage Caused by Misapplication of Kerotest Packless Metal Diaphragm Globe Valves 18 April 1988 Topic Water hammer Information Notice 1988-14, Potential Problems with Electrical Relays 18 April 1988 Information Notice 1988-15, Availability of Us Food & Drug Administration (FDA) Approved Potassium Iodide for Use in Emergencies Involving Radioactive Iodine 18 April 1988 Topic Water hammer Potassium iodide Information Notice 1988-15, Availability of Us Food & Drug Administration (Fda) Approved Potassium Iodide for Use in Emergencies Involving Radioactive Iodine 18 April 1988 Topic Potassium iodide Information Notice 1988-16, Identify Waste Generators in Shipments of Low-Level Waste to Land Disposal Facilities 22 April 1988 Information Notice 1988-17, Summary of Responses to NRC Bulletin 87-01, Thinning of Pipe Walls in Nuclear Power Plants 22 April 1988 Topic Safe Shutdown Weld Overlay Feedwater Heater Through-Wall Leak Water hammer Information Notice 1988-18, Malfunction of Lockbox on Radiography Device 25 April 1988 Topic Overexposure Information Notice 1988-19, Questionable Certification of Class Ie Components 26 April 1988 Topic Water hammer Information Notice 1988-19, Questionable Certification of Class IE Components 26 April 1988 Information Notice 1988-20, Unauthorized Individuals Manipulating Controls and Performing Control Room Activities 5 May 1988 Information Notice 1988-21, Inadvertent Criticality Events at Oskarshamn and at U.S. Nuclear Power Plants 9 May 1988 Topic Shutdown Margin Information Notice 1988-22, Disposal of Sludge from Onsite Sewage Treatment Facilities at Nuclear Power Stations 12 May 1988 Topic Sewage Treatment Plant Information Notice 1988-23, Potential for Gas Binding of High-Pressure Safety Injection Pumps During a Loss-Of-Coolant Accident 12 May 1988 Information Notice 1988-24, Failures of Air-Operated Valves Affecting Safety-Related Systems 13 May 1988 Information Notice 1988-25, Minimum Edge Distance for Expansion Anchor Bolts 16 May 1988 Topic Earthquake Information Notice 1988-26, Falsified Pre-Employment Screening Records 16 May 1988 Information Notice 1988-27, Deficient Electrical Terminations Identified in Safety-Related Components 18 May 1988 Information Notice 1988-28, Potential for Loss of Post-Loca Recirculation Capability Due to Insulation Debris Blockage 19 May 1988 Topic Coatings Information Notice 1988-29, Deficiencies in Primary Containment Low-Voltage Electrical Penetration Assemblies 24 May 1988 Information Notice 1988-30, Target Rock Two-State SRV Setpoint Drift Update 25 May 1988 Information Notice 1988-31, Steam Generator Tube Rupture Analysis Deficiency 25 May 1988 Topic Loss of Offsite Power Information Notice 1988-32, Prompt Reporting to NRC of Significant Incidents Involving Radioactive Material 25 May 1988 Topic Overexposure Information Notice 1988-33, Recent Problems Involving the Model Spec 2-T Radiographic Exposure Device 27 May 1988 Topic Depleted uranium Information Notice 1988-34, Nuclear Material Control & Accountability of Non-Fuel Special Nuclear Material at Power Reactors 31 May 1988 Information Notice 1988-36, Possible Sudden Loss of RCS Inventory During Low Coolant Level Operation 8 June 1988 Information Notice 1988-37, Flow Blockage of Cooling Water to Safety System Components 14 June 1988 Topic Ultimate heat sink Information Notice 1988-38, Failure of Undervoltage Trip Attachment of General Electric Circuit Breakers 15 June 1988 Information Notice 1988-39, Loss of Recirculation Pumps with Power Oscillation Event 15 June 1988 Topic Feedwater Heater Information Notice 1988-40, Examiners Handbook for Developing Operator Licensing Examinations 22 June 1988 Information Notice 1988-41, Physical Protection Weaknesses Identified Through Regulatory Effectiveness Reviews (RERs) 22 June 1988 Information Notice 1988-41, Physical Protection Weaknesses Identified Through Regulatory Effectiveness Reviews (Rers) 22 June 1988 Information Notice 1988-42, Circuit Breaker Failures Due to Loose Charging Spring Motor Mounting Bolts 23 June 1988 Topic Locktite Information Notice 1988-43, Solenoid Valve Problems 23 June 1988 Topic Stroke time Information Notice 1988-44, Mechanical Binding of Spring Release Device in Westinghouse Type DS-416 Circuit Breakers 24 June 1988 Information Notice 1988-45, Problems in Protective Relay & Circuit Breaker Coordination 7 July 1988 Topic Safe Shutdown Information Notice 1988-46, Licensee Report of Defective Refurbished Circuit Breakers 8 July 1988 Information Notice 1988-47, Slower-than-Expected Rod-drop Times 14 July 1988 ... further results