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| | issue date = 06/05/1981 | | | issue date = 06/05/1981 |
| | title = LER 81-009/01T-0:on 810522,Westinghouse Identified Potential Sys Interaction Involving Vol Control Tank Level Control Sys & Charging Pumps.Caused by Design Criteria Misinterpretation.Procedure Mods Will Be Made | | | title = LER 81-009/01T-0:on 810522,Westinghouse Identified Potential Sys Interaction Involving Vol Control Tank Level Control Sys & Charging Pumps.Caused by Design Criteria Misinterpretation.Procedure Mods Will Be Made |
| | author name = WILSON J L | | | author name = Wilson J |
| | author affiliation = VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) | | | author affiliation = VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| | addressee name = | | | addressee name = |
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Line 17: |
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| =Text= | | =Text= |
| {{#Wiki_filter:NRC FORM 366 (7-77) -.CLEAR REGULATORY COMMISSION LICENSEE EVENT REPORT CONTROL BLOCK: ! 10 (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATIONI 1'--------"--'----''---"----:,6 LU2] l V I A I s I p I s I 1 101 0 I 0 I -I o I o I a I o I a I -I o I o 101 4 I 1 ! 11 1 ! 1101 I I LICENSE NUMBER 2S 26 LICENSE TYPE 30 :7 CAT 58 | | {{#Wiki_filter:NRC FORM 366 (7-77) |
| * 8 9 i.lCENSE!:
| | CONTROL BLOCK: ! |
| CODE 1" 15 ::JN'T I o I , I 7 8
| | 1'--------"--'----''---"----:,6 ~ |
| ~© I o I s I o I o I o I 2 I s i o 101 o I s 12 J 2 I s I 1 IG) I o I 6 I o I 5 J_ s I 1 I G) 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 7S RE?ORTDA,c; 80 :VENT D:SCRIPTION AND PROBABLE CONSEQUENCES | | LICENSEE EVENT REPORT 10 |
| @ I Westinghouse has identified a potential system interaction concern involving the [£ID I volume control tank (VCT) level control .system and charging pumps. A postulated
| | . C L E A R REGULATORY COMMISSION (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATIONI LU2] |
| [ill] I failure of the VCT level control system,' without operator intervention, could lead [QJ]J I to a loss of suction fluid for the charging pumps. Numerous visual and audible [IJTI / indications are available to the operator to pemit the termination of this [£JJJ jpostulated event. The health*and safety of the public were not affected. | | ~ 8 lV 9 |
| This *[II]] 1 event is reportable per T.S.-6.6.2.a(9).
| | IA I s I p I s I 1 101 0 i.lCENSE!: CODE 1" 15 I0 I- I o I o I a I o I a I - I o I o2S10126 4 I 1! 11 TYPE LICENSE NUMBER LICENSE 1! 1101 30 :7 CAT I 58I* |
| 7 8 9 [ill] 7 B SYSTEM CODE IP \CI@ 9 10 Q. LER/RO CVENT YEAR '0 REPOR7 l8 I 11 NUMBER 21 . 22 CAUSE CAUSE CODE SUBCODE COMPONENT CODE w@ ~@ I z I z I z 1 z I z I z 1@ 11 12 1:l SEQUENTIAL REPORT NO. Io 10 I 9 I 24 26 18 OCCURRENCE CODE 10 11 I 28 29 COMP. SUBCODE ~@ 19 REPORT TYPE Lu 30 VALVE SUBCDDE Lu@ 20 AC.ION FUTURE 7AKEN ACTION EFFECT SHUTDOWN . '* (.;::::\ ATTACHMENT* | | ::JN'T Io 7 |
| * NPRD~ PRIME COMP.,--*** | | I,I 8 |
| SUPPLIER ** ** REVISION NO. L~J *:i:z . COMPONEN":". | | ~~~~~ ~© I o I 60 61 s I oI oI oI DOCKET NUMBER 2I s i o 101 o I s 68 69 12 J 2 EVENT DATE I s I1 IG) I7So I 6 I o I 5 J_ s I 1 IG) 74 RE?ORTDA,c; 80 |
| MANUFACTURER I 80 ON PLANT ME;THOD . HOURS SUBMITTED FOAM SUB. I 11 l@l£J@) ~@ l..Ll Io I 01 *oJ o 1* LlJ@-l1l.J@) J:l 34 JS 3B 37 40 41 4'2 W@l_-*. *1 z I 9 l 9 I 9 )@ CAUSE DESCRIPTION AND CORRECTIVE ACTIONS @ 43 44 47 The cause of this concern appeared to be one of design criteria interpretatio1J..,_~
| | :VENT D:SCRIPTION AND PROBABLE CONSEQUENCES @ |
| __ Jb~ operating staff has been alerted to this potential problem and rhe _consequences.
| | I Westinghouse has identified a potential system interaction concern involving the |
| IT]]] I Mi.nor. modifications to Unit No. l and 2 pr_ocedures wi 11 be made to provide additional!
| | [£ID I volume control tank (VCT) level control .system and charging pumps. A postulated |
| CiJdJ I guidance.
| | [ill] I failure of the VCT level control system,' without operator intervention, could lead |
| ITEl 1 a 9 FAClLITY (JO' STATUS % FOWER OTHER STATUS \::::::,1 t2TIJ ~:@) ! 0 I O j O 111...._D_e_fu_e_l_ed
| | [QJ]J I to a loss of suction fluid for the charging pumps. Numerous visual and audible |
| __ .__j 7 8 9 10 11 1'3 ACTIVITY CONTENT Q\ RELEASEO OF RELEASE AMOUNT OF ACTIVITY~
| | [IJTI / indications are available to the operator to pemit the termination of this |
| C::fil L1J@ I z 1@)11...._.;.:.N:,.:./A~-----.....J 7 3 9 10 11 80 ~00~ DISCOVERY DISCOVERY DESCRIPTION
| | [£JJJ jpostulated event. The health*and safety of the public were not affected. This |
| '5 Ll2.J<22)~1~F~~x~t~e~r~n~a~l=--~S~ou=r=-=-c=e
| | *[II)) 1 event is reportable per T.S.- 6.6.2.a(9). |
| ......... | | I 7 8 9 80 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCDDE |
| _..,.....
| | [ill] IP \CI@ w@ ~@ Iz Iz I z 1 z I z I z 1@ ~@ Lu@ |
| ..................
| | 7 B 9 10 11 12 1:l 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION Q. LER/RO CVENT YEAR REPORT NO. CODE TYPE NO. |
| -............................................. | | '0 REPOR7 NUMBER l8 I 11 Io 10 I 9 I 10 11 I Lu L~J . |
| ---i 45 46 44 80 _LOCATION OF RELEASE @ 44 45 80 ?!:RSONNEL EXPOSURES r::;:;,..
| | 21 22 24 26 28 29 30 *:i:z AC.ION FUTURE EFFECT SHUTDOWN . '* (.;::::\ ATTACHMENT* |
| NUMBE"l A TYP: DESCRIPTiON U2] JO I OJ ':lJ0L.B@L.........
| | * NPRD~ PRIME COMP.,--*** COMPONEN":". |
| _____ N_/A _____________________
| | 7AKEN ACTION ON PLANT ME;THOD . HOURS ~ SUBMITTED FOAM SUB. SUPPLIER ** ** MANUFACTURER I 11 l@l£J@) |
| ......... | | J:l 34 |
| ,, _ _.. a s n 12 13 80 ~ERSONNEL INJURIES Q NUMBER DESCRIPTIONO GliJ OJ O I O l@L..........------~t.:.:..1/.:.:.A
| | ~@ |
| __________________
| | JS l..Ll Io I 01 *oJ o 1* |
| -___. a s *
| | 3B 37 40 LlJ@- |
| * 11 12 eo LOSS OF OR DAMAGE TO FACILITY ;-vpe DESCRIPTION
| | 41 l1l.J@) |
| \::;J [2]Ij ~{§)L.........._.
| | 4'2 W@l_-*. *1 z I 9 l 9 I 9 )@ |
| _______ ___;.,:.:1/~A:..........
| | 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS @ |
| _________________
| | The cause of this concern appeared to be one of design criteria interpretatio1J..,_~__Jb~ |
| ____. ; 8 9 10 so PUBLICITY G\ NRC USE ONLY ISSUED(,:";\
| | operating staff has been alerted to this potential problem and rhe _consequences. |
| DESCRIPTION~
| | IT))] I Mi.nor. modifications to Unit No. l and 2 pr_ocedures wi 11 be made to provide additional! |
| "' LiliJ IN 1e, N A 1 1 1 , 1 1 1 1 1 1 1 S 9 10. 68 69 80 ; ,'\JAME c,pc;;;plpE"l J, L. Wilson ~'-'ONEf 804) 357-3184 _____ 81 fJ6 o.~ '~-siJ-----------
| | CiJdJ I guidance. |
| _ ----------
| | ITEla 1 9 80 FAClLITY (JO' ~00~ ~ |
| _---------
| | STATUS % FOWER OTHER STATUS \::::::,1 DISCOVERY DISCOVERY DESCRIPTION '5 t2TIJ ~:@) ! 0 I O j O 111...._D_e_fu_e_l_ed_ _ .__j Ll2.J<22)~1~F~~x~t~e~r~n~a~l=--~S~ou=r=-=-c=e........._..,.......................- .............................................---i 7 8 9 10 11 1'3 44 45 46 80 ACTIVITY CONTENT Q\ |
| ___ **-.* _ ---~-------~--------------
| | RELEASEO OF RELEASE AMOUNT OF ACTIVITY~ _LOCATION OF RELEASE @ |
| *--
| | C::fil L1J@ I z 1@)11...._.;.:.N:,.:./A~-----.....J 7 3 9 10 11 44 45 80 |
| -ATTACHMENT 1 SURRY POWER STATION, UNIT NO. DOCKET NO: 50-280 REPORT NO: 81-009/017-0 EVENT DATE: 05-22-81 TITLE OF EVENT: VCT LEVEL SYSTEM DESIGN PROBLEM 1. DESCRIPTION OF EVENT: Westinghouse has identified a potential system interaction involving the volume control tank (VCT) level control system and the charging pumps. A postulated failure (failed high) of the VCT level control system, without operator intervention, could lead to a possible loss of suction fluid for the charging pumps. This is reportable per Tech. Spec. 6.6.2.a (9). 2. PROBABLE CONSEQUENCES arid STATUS of REDUNDANT EQUIPMENT:
| | ?!:RSONNEL EXPOSURES r::;:;,.. |
| The VCT is the normal supply to the charging pumps. The RWST is the alternate and accident supply to the charging pumps. If VCT level. transmitter (LT-115) failed high, letdown* to the VCT would be diverted to the Primary Drain Tank. The auto~attc mak~ up to the VCT and the automatic transfer to the RWST, on .. *VCH.. Low*-low level, would not_be funq,ional; Throughout this event, numerous ,set.onda ry *ind i caFons (VCT pressure, charging pressure and f 1 ow) and a 1 arms would be available to the operator for system evalua~ion.
| | NUMBE"l A TYP: DESCRIPTiON U2] JO I OJ ':lJ0L.B@L........._____N_/A_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.........,,__.. |
| In addition, redundant VCT level indication (Ll-112), located near the VCT, would be available.
| | a s n 12 13 80 |
| Westinghouse has indicated that the operator would have approximately 10 minutes to transfer the charging pump suction from the VCT to the RWST or initiate other appropriate corrective actions to prevent possible damage to the operating charging pump. The failure of the VCT level control system will not prevent the manual transfer of charging pump suction* to the RWST or the automatic transfer to the RWST during an accident.
| | ~ERSONNEL INJURIES Q NUMBER DESCRIPTIONO GliJ OJ O I O l@L..........------~t.:.:..1/.:.:.A_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _-___. |
| | a s * |
| | * 11 12 eo LOSS OF OR DAMAGE TO FACILITY ~ |
| | ;-vpe DESCRIPTION \::;J |
| | [2]Ij ~{§)L.........._.__________;.,:.:1/~A:.........._ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _____. |
| | ; 8 9 10 so PUBLICITY G\ NRC USE ONLY ISSUED(,:";\ DESCRIPTION~ "' |
| | LiliJ IN 1e, S 9 10. |
| | NA 68 1 1 1, 1 1 1 69 1 1 1 1~ |
| | 80 ; |
| | ,'\JAME c,pc;;;plpE"l J, L. Wilson ~'-'ONEf 804) 357-3184 ~ |
| | _____81 fJ6 o.~ '~-siJ----------- _---------- _-- - - - ___ * -.* _---~-------~-------------- *- |
| | |
| | ATTACHMENT 1 SURRY POWER STATION, UNIT NO. |
| | DOCKET NO: 50-280 REPORT NO: 81-009/017-0 EVENT DATE: 05-22-81 TITLE OF EVENT: VCT LEVEL SYSTEM DESIGN PROBLEM |
| | : 1. DESCRIPTION OF EVENT: |
| | Westinghouse has identified a potential system interaction involving the volume control tank (VCT) level control system and the charging pumps. |
| | A postulated failure (failed high) of the VCT level control system, without operator intervention, could lead to a possible loss of suction fluid for the charging pumps. |
| | This is reportable per Tech. Spec. 6.6.2.a (9). |
| | : 2. ~ PROBABLE CONSEQUENCES arid STATUS of REDUNDANT EQUIPMENT: |
| | The VCT is the normal supply to the charging pumps. The RWST is the alternate and accident supply to the charging pumps. If VCT level. transmitter (LT-115) failed high, letdown* to the VCT would be diverted to the Primary Drain Tank. |
| | The auto~attc mak~ up to the VCT and the automatic transfer to the RWST, on |
| | .. *VCH.. Low*-low level, would not_be funq,ional; Throughout this event, numerous |
| | ,set.onda ry *ind i caFons (VCT pressure, charging pressure and f 1ow) and a 1arms would be available to the operator for system evalua~ion. In addition, redundant VCT level indication (Ll-112), located near the VCT, would be available. |
| | Westinghouse has indicated that the operator would have approximately 10 minutes to transfer the charging pump suction from the VCT to the RWST or initiate other appropriate corrective actions to prevent possible damage to the operating charging pump. |
| | The failure of the VCT level control system will not prevent the manual transfer of charging pump suction* to the RWST or the automatic transfer to the RWST during an accident. |
| Since num~r6us visual and audible indications are available to the operator to permit the termination of this postulated event, the health and safety of the public would not be affected. | | Since num~r6us visual and audible indications are available to the operator to permit the termination of this postulated event, the health and safety of the public would not be affected. |
| : 3. CAUSE: The cause .. of this.cconcern .appeared to be one of design criteria interpretation. | | : 3. CAUSE: |
| : 4. IMMEDIATE CORRECTIVE ACTl'ON: The operating staff was alerted to this potential problem and the consequences. | | The cause . of this.cconcern .appeared to be one of design criteria interpretation. |
| -ATTACHMENT 1 (continued)
| | : 4. IMMEDIATE CORRECTIVE ACTl'ON: |
| SURRY POWER STATION, UNIT NO. DOCKET NO: 50-280 REPORT NO: 81-009-017-0 EVENT DATE: 05-22-81 5. SUBSEQUENT CORRECTIVE ACTION: A review of station procedures was conducted, and as a result, minor cations (clarifications) will be made. )n addition, the postulated event, the consequences and the required corrective actions will be included in the operator's training/retraining program. 6. ACTION TAKEN TO PREVENT RECURRENCE: | | The operating staff was alerted to this potential problem and the consequences. |
| | |
| | ATTACHMENT 1 (continued) |
| | SURRY POWER STATION, UNIT NO. |
| | - DOCKET NO: 50-280 REPORT NO: 81-009-017-0 EVENT DATE: 05-22-81 |
| | : 5. SUBSEQUENT CORRECTIVE ACTION: |
| | A review of station procedures was conducted, and as a result, minor modifi-cations (clarifications) will be made. )n addition, the postulated event, the consequences and the required corrective actions will be included in the operator's training/retraining program. |
| | : 6. ACTION TAKEN TO PREVENT RECURRENCE: |
| At this time, none is deemed necessary. | | At this time, none is deemed necessary. |
| : 7. GENERIC IMPLICATIONS: | | : 7. GENERIC IMPLICATIONS: |
| This concern is generic to both Unit No. 1 and 2, therefore, Unit No. 2 procedures will be modified . . ,.,,_~~-.-*,----,,.. | | This concern is generic to both Unit No. 1 and 2, therefore, Unit No. 2 procedures will be modified . |
| ,...._. --,---,--~. | | .,.,,_~~-.-*,----,,.. ,...._. --,---,--~. -- ~ -- *.-.--*-~---~----}} |
| ----*.-.--*-~---~----}} | |
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LER 96-007-00:on 960821,failed to Complete Fire Detection Zone Inspections within Required Time Period.Caused by Personnel Error.Counseled Personnel Re Fire Detection Zone Inspections & Revised Fire Watch training.W/960920 Ltr
ML18153A0481996-08-26026 August 1996
LER 96-005-00:on 960803,manual Reactor Trip.Caused by Loss of Electro Hydraulic Control Pressure.Repaired Two Compression Fitting Union Connections on Leaking Fitting & Performed Evaluations on Other tubing.W/960826 Ltr
ML18153A0521996-08-20020 August 1996
LER 96-004-01:on 960510,discovered Hydrogen Analyzers Inoperable.Caused by Procedural Deficiencies.Implemented Permanent Changes to Hydrogen Analyzer Instrument Calibr Procedures.W/960820 Ltr
ML18153A0321996-07-30030 July 1996
LER 96-006-01:on 960618,anti-corrosion Coating Had Not Been Reapplied to Station Battery 2B.Caused by Procedural Error in That Verbatim TS Compliance Not Reflected in Procedures. Coating Was Applied to batteries.W/960730 Ltr
ML18153A0281996-07-17017 July 1996
LER 96-006-00:on 960618,failed to Apply anti-corrosion Coating to Station Battery 2B.Caused by Procedural Error. Applied anti-corrosion Coating to Batteries & Revised TS 4.6.C.1.f Re Battery Coating requirements.W/960717 Ltr
ML18153A0141996-07-0202 July 1996
LER 96-004-00:on 960606,turbine/reactor Trip Occurred.Caused by High Level in Steam Generator B.Placed Plant in Hot Shutdown Condition,Calculated Shutdown Margin & Monitored Critical Safety Function Status trees.W/960702 Ltr
1999-08-27
[Table view]
Category:RO)
MONTHYEARML18152B4411999-08-27027 August 1999
LER 99-005-00:on 990731,effluent Radiation Monitors Were Declared Inoperable.Caused by Degraded Heat Trace Circuits for Monitors Sample Suction Line.Degraded Heat Trace Circuit Was Replaced & Addl Heat Trace Is Being Installed
ML18152B4421999-08-27027 August 1999
LER 99-006-00:on 990802,determined That Plant Was Outside of App R Design Basis Due to Fire Barrier Deficiencies. Caused by Original Plant Design Deficiencies.Fire Watches Were Established & Mods Have Been Completed.With 990827 Ltr
ML18152B3771999-08-13013 August 1999
LER 99-004-00:on 990714,TS Violation Due to non-safety Related Fans Effect on CR Boundary Was Noted.Cause of Event Has Not Yet Been Determined.Cable Spreading Room Doors Were Operned to Reduce Pressure in Rooms
ML18152B4181999-05-18018 May 1999
LER 99-002-00:on 990425,MSSVs Tested Out of Tolerance for as Found Setpoint.Caused by Minor Setpoint Drift.No Immediate Action Required.Deviation Rept Submitted for Each Valve.With 990518 Ltr
ML18152B4111999-04-28028 April 1999
LER 99-003-00:on 990331,potential Loss of Charging Pumps Was Noted.Caused by Main CR Fire.Station Deviation Was Issued on 990331.With 990428 Ltr
ML18153A2741999-03-29029 March 1999
LER 99-002-00:on 990301,prematurely Released Fire Watches Resulted in Violation of TS 3.21.B.7.Caused by Inadequate Procedure.Procedure for Opening & Sealing Fire Stops Was Revised on 990212
ML18153A2681999-03-19019 March 1999
LER 98-013-01:on 981122,turbine/reactor Tripped on High Due to Short Circuit in Summator for MSL C Loop Channel III Flow Transmitter.Replaced 1-MS-FT1494 Summator & Module Repair Procedure Revised.With 9903190 Ltr
ML18152B7261999-01-21021 January 1999
LER 99-001-00:on 981222,auxiliary Feedwater Pipe Support Missed Surveillance.Caused by Personnel Error.Station Deviation Rept Was Submitted.Two Supports in Question Received Required Code Insp & Were Found Acceptable
ML18152B5811998-12-16016 December 1998
LER 98-013-00:on 981122,turbine/reactor Trip on High SG Level Occurred.Caused by Instrument Failure.Control Room Operators Placed Unit in Safe,Shutdown Condition
ML18152B5781998-12-16016 December 1998
LER 98-014-00:on 981126,manual Reactor Trip in Response to Main Feedwater Regulating Valve Failure Occurred.Caused by Dislocation of Retaining Clip in Positioner.Control Room Operators Placed Unit in Safe,Shutdown Condition
ML18152B7121998-12-0404 December 1998
LER 98-S01-00:on 981105,noted Failure to Deactivate Station Access Badge.Caused by Human Error.Licensee Will Now Deactivate Station Badges Before Clearance Is Revoked & Process for Badge Deactivations Have Been Strengthened
ML18152B7041998-12-0101 December 1998
LER 98-012-00:on 981102,noted That EDGs Were Concurrently Inoperable.Caused by Required Testing Per TS 3.16.B.1.a.2. Redundant EDG Was Returned to Svc within Two Hour Period, Following Satisfactory Testing.With 981201 Ltr
ML18152B6161998-11-0606 November 1998
LER 98-011-00:on 981008,diesel Driven Fire Pump Failed to Start During Performance of Monthly Operability Test.Caused by Faulty Overspeed Trip Device Failure.Diesel Driven Fire Pump Declared Inoperable
ML18152B6081998-10-23023 October 1998
LER 98-010-01:on 980715,intake Canal Level Probes Were Inoperable Due to Marine Growth.Caused by Design of Canal Level Instrumentation.Canal Level Probes Will Continue to Be Monitored More Closely
ML18152B7811998-07-31031 July 1998
LER 98-010-00:on 980715,low Intake Canal Level Instrument Channel I Was Declared Inoperable to Allow Testing of Intake Canal Level Probe 1-CW-LE-102.Subject Probe Was Cleaned by Diver,Tested & Channel I Was Returned to Operable Status
ML18153A2581998-06-0303 June 1998
LER 98-009-00:on 980509,nonisolable Leak of Reactor Coolant Pump Seal Injection Line Weld,Was Discovered.Caused by Lack of Fusion or Thermal Fatigue Coupled W/Vibration Stress Due to Loose Rod Hanger.Rcp Seal Injection Line Removed
ML18152B8241998-05-22022 May 1998
LER 98-008-00:on 980228,auxiliary Ventilation Fans Were Noted in Condition Outside of Design Basis.Caused by Failure to Recognize Potential Impact of Certain Design Basis Accident Scenarios.No Corrective Actions Needed
ML18152B7951998-04-29029 April 1998
LER 98-007-00:on 980330,radiation Monitors Were Declared Inoperable.Caused by Change in Operating Temperature Range. Preplanned Alternate Method of Monitoring Was Initiated IAW TS Table 3.7-6
ML18153A2521998-04-22022 April 1998
LER 98-005-01:on 980212,fire Watch Insp Exceeded One Hour. Caused by Lack of Attention to Detail by Individual Involved.Individual Involved Was Coached on Requirement to Perform Fire Watch Patrols within Required Time Frame
ML18153A2511998-04-22022 April 1998
LER 98-006-00:on 980324,unisolable Through Wall Leak of RCP Thermowell Was Noted.Cause of Leak Is Unknown.Rtd Will Be Replaced
ML18153A2391998-03-13013 March 1998
LER 98-005-00:on 980212,fire Watch Insp Frequency Exceeded One H Occurred.Category 2 Root Cause Evaluation Being Conducted to Determine Cause of Event.Station Deviation Issued
ML18153A2341998-03-0909 March 1998
LER 98-003-00:on 980226,no Procedural Guidance for Maintaining EDG Minimum Fuel Supply During Loop,Was Identified.Caused by Absence of Procedural Instructions. Deviation Rept Submitted to Document Deviating Condition
ML18153A2301998-03-0606 March 1998
LER 98-004-00:on 980206,fire Watch Was Released Prematurely Resulting in Violation of Ts.Caused by Inadequate Planning of Repair Activity.Work Orders Will Include Ref to Applicable Procedures Developed to Assist in Repairs
ML18153A2251998-03-0404 March 1998
LER 98-002-00:on 980202,automatic Turbine Trip Resulted in Automatic Reactor Trip.Caused Degraded Generator Voltage Regulator sub-component Failure.Placed Plant in Safe Hot SD & Replaced Intermittent Relay & Relay Socket
ML18153A2201998-02-0606 February 1998
LER 98-001-00:on 980108,deficient Test Due to Faulty Test Equipment Resulted in TS Violation.Caused by Faulty Vibration Analyzer Cable or Loose Connection.Station Deviation Rept Was submitted.W/980206 Ltr
ML18153A2071998-01-13013 January 1998
LER 97-012-01:on 971028,loss of Power to Latching Mechanism on Several Doors Occurred.Caused by Tripping of Two Breakers in Security Distribution Panel.Reset Affected Breakers Which Restored Power to Security Systems & Affected Doors
ML18153A2101998-01-13013 January 1998
LER 97-009-01:on 971014,declared Intake Canal Level Probes Inoperable Due to Marine Growth.Caused by Inadequate Maint of Intake Canal Level Probes.Subject Probes Were Cleaned, Tested Satisfactorily & Returned to Operable Status
ML18153A1911997-11-26026 November 1997
LER 97-011-00:on 971030,determined That Periodic Test Procedures for Testing Reactor Trip Bypass Breakers Did Not Test Manual Undervoltage Trip.Caused by mis-interpretation of Term in-service. Procedures Revised
ML18153A1971997-11-26026 November 1997
LER 97-012-00:on 971028,loss of Power to Latching Mechanism on Several Doors Occurred.Caused by Tripping of Breaker in Security Distribution Panel in Central Alarm Station (CAS) Panel.Breakers in Affected CAS Panel Reset
ML18153A1921997-11-25025 November 1997
LER 97-010-00:on 971028,discovered Missed Fire Protection Surveillance Pt.Caused by Personnel Error.Satisfactorily Completed PT Procedure 0-OPT-FP-009 & Diesel Driven Fire Pump 1-FP-P-2 Declared operable.W/971125 Ltr
ML18153A1831997-11-12012 November 1997
LER 97-009-00:on 971014,declared Intake Canal Level Probes Inoperable Due to Marine Growth.Cause Indeterminate.Divers Inspected,Cleaned & Returned Probes to Operable Status & Initiated Interdepartmental Team to Investigate Cause
ML18153A1791997-11-0707 November 1997
LER 97-008-00:on 971011,invalid Actuation of ESF Occurred. Caused by Personnel Errors.Main CR Bottled Air Sys Isolated & Containment Hydrogen Analyzer Heat Tracing Actuation Signal Reset
ML18153A1721997-10-30030 October 1997
LER 97-007-00:on 970930,determined That Plant Was Outside App R Design Basis Due to Vital Bus Isolation Issue.Caused by Personnel Error.Installed Circuit Protective Device During Oct 1997 Refueling Outage
ML18153A1421997-06-10010 June 1997
LER 97-001-01:on 970123,shutdown Occurred Due to Drain Line Weld Leak.Inspected & Tested Turbine Trip Actuation circuitry.W/970610 Ltr
ML18153A1391997-05-28028 May 1997
LER 97-005-00:on 970502,Unit 1 Power Range Nuclear Instrumentation Was Inoperable Due to Personnel Error.Sro & STA That Were Involved in Event Were Counseled
ML18153A1291997-04-18018 April 1997
LER 97-006-00:on 970320,loss of Refueling Integrity Due to Inadequate Containment Closure Process & Verification.Fuel Movement Stopped IAW Action Statement Requirements of TS 3.10.B.W/970418 Ltr
ML18153A1281997-04-15015 April 1997
LER 97-004-00:on 970317,main Steam Safety Valve Was Outside as Found Setpoint Tolerance.Specific Cause Unknown,However, Minor Setpoint Drift Can Be Expected.No Immediate Corrective Actions performed.W/970415 Ltr
ML18153A1241997-04-0808 April 1997
LER 97-002-01:on 970116,one Train of Auxiliary Ventilation Sys Was Inoperable Outside of Ts.Caused by Personnel Error. Submitted Deviation Rept Re Reverse Rotation of Fan & Work Request to Adjust linkage.W/970408 Ltr
ML18153A1191997-03-19019 March 1997
LER 97-001-00:on 970218,manual Reactor Trip & ESF Actuation Occurred Due to Loss of EHC Control Power.Caused by Momentary Short.Relay Card Was replaced.W/970319 Ltr
ML18153A1201997-03-19019 March 1997
LER 97-003-00:on 970219,loss of Pressurizer Heaters Resulted in Manual U1 Trip & U2 ESF Actuation.Caused by Loss of Group C Pressurizer Proportional Heaters.Reactor Trip Breakers Were Verified open.W/970319 Ltr
ML18153A1131997-02-20020 February 1997
LER 97-001-00:on 970123,shutdown Occurred Due to Steam Drain Line Weld Leak.Management Was Notified & Shift Supervisor Invoked Requirements of TS 4.15.C.1.W/undtd Ltr
ML18153A1101997-02-13013 February 1997
LER 97-002-00:on 970116,one Train of Auxiliary Ventilation Sys Declared Inoperable.Caused by Personnel Error.Properly Adjusted Damper 1-VS-MOD-58B & Exited Seven Day LCO on 970116.W/970214 Ltr
ML18153A0951997-01-0202 January 1997
LER 97-002-00:on 961213,automatic Reactor Trip Occurred During Planned Shutdown.Caused by Steam Flow/Feedwater Flow Mismatch.Rps Functioned as Designed & Plant Placed in Hot Shutdown
ML18153A0931996-12-12012 December 1996
LER 96-008-00:on 961112,water Gas Decay Tank Oxygen Analyzer Pressure Sensors Inoperable Due to Vendor Supplied Equipment Not Meeting Procurement specifications.Post-implementation Procedures Revised & Transducers replaced.W/961212 Ltr
ML18153A0691996-09-19019 September 1996
LER 96-007-00:on 960821,failed to Complete Fire Detection Zone Inspections within Required Time Period.Caused by Personnel Error.Counseled Personnel Re Fire Detection Zone Inspections & Revised Fire Watch training.W/960920 Ltr
ML18153A0481996-08-26026 August 1996
LER 96-005-00:on 960803,manual Reactor Trip.Caused by Loss of Electro Hydraulic Control Pressure.Repaired Two Compression Fitting Union Connections on Leaking Fitting & Performed Evaluations on Other tubing.W/960826 Ltr
ML18153A0521996-08-20020 August 1996
LER 96-004-01:on 960510,discovered Hydrogen Analyzers Inoperable.Caused by Procedural Deficiencies.Implemented Permanent Changes to Hydrogen Analyzer Instrument Calibr Procedures.W/960820 Ltr
ML18153A0321996-07-30030 July 1996
LER 96-006-01:on 960618,anti-corrosion Coating Had Not Been Reapplied to Station Battery 2B.Caused by Procedural Error in That Verbatim TS Compliance Not Reflected in Procedures. Coating Was Applied to batteries.W/960730 Ltr
ML18153A0281996-07-17017 July 1996
LER 96-006-00:on 960618,failed to Apply anti-corrosion Coating to Station Battery 2B.Caused by Procedural Error. Applied anti-corrosion Coating to Batteries & Revised TS 4.6.C.1.f Re Battery Coating requirements.W/960717 Ltr
ML18153A0141996-07-0202 July 1996
LER 96-004-00:on 960606,turbine/reactor Trip Occurred.Caused by High Level in Steam Generator B.Placed Plant in Hot Shutdown Condition,Calculated Shutdown Margin & Monitored Critical Safety Function Status trees.W/960702 Ltr
1999-08-27
[Table view]
Category:TEXT-SAFETY REPORT
MONTHYEARML18152A2811999-10-12012 October 1999
Technical Basis for Elimination of Nozzle Inner Radius Insps (for Nozzles Other than Reactor Vessel),Technical Basis for ASME Section XI Code Case N-619.
ML18152B3531999-09-30030 September 1999
Monthly Operating Repts for Sept 1999 for Surry Power Station,Units 1 & 2.With 991012 Ltr
ML18152B6651999-08-31031 August 1999
Monthly Operating Repts for Aug 1999 for Surry Power Station Units 1 & 2.With 990915 Ltr
ML18152B4421999-08-27027 August 1999
LER 99-006-00:on 990802,determined That Plant Was Outside of App R Design Basis Due to Fire Barrier Deficiencies. Caused by Original Plant Design Deficiencies.Fire Watches Were Established & Mods Have Been Completed.With 990827 Ltr
ML18152B4411999-08-27027 August 1999
LER 99-005-00:on 990731,effluent Radiation Monitors Were Declared Inoperable.Caused by Degraded Heat Trace Circuits for Monitors Sample Suction Line.Degraded Heat Trace Circuit Was Replaced & Addl Heat Trace Is Being Installed
ML18151A3981999-08-13013 August 1999
SPS Unit 2 ISI Summary Rept for 1999 Refueling Outage.
ML18152B3771999-08-13013 August 1999
LER 99-004-00:on 990714,TS Violation Due to non-safety Related Fans Effect on CR Boundary Was Noted.Cause of Event Has Not Yet Been Determined.Cable Spreading Room Doors Were Operned to Reduce Pressure in Rooms
ML18152B3791999-07-31031 July 1999
Monthly Operating Repts for July 1999 for Surry Power Station,Units 1 & 2.With 990811 Ltr
ML18152B3911999-06-30030 June 1999
Monthly Operating Repts for June 1999 for Surry Power Station,Units 1 & 2.With 990713 Ltr
ML18152B4341999-05-31031 May 1999
Monthly Operating Repts for May 1999 for Surry Power Station,Units 1 & 2.With 990614 Ltr
ML20195E2401999-05-31031 May 1999
Rev 2 to COLR for SPS Unit 2 Cycle 16 Pattern Ag
ML18152B4181999-05-18018 May 1999
LER 99-002-00:on 990425,MSSVs Tested Out of Tolerance for as Found Setpoint.Caused by Minor Setpoint Drift.No Immediate Action Required.Deviation Rept Submitted for Each Valve.With 990518 Ltr
ML18152B4161999-04-30030 April 1999
Monthly Operating Repts for Apr 1999 for Surry Power Station Units 1 & 2.With 990512 Ltr
ML18152B4111999-04-28028 April 1999
LER 99-003-00:on 990331,potential Loss of Charging Pumps Was Noted.Caused by Main CR Fire.Station Deviation Was Issued on 990331.With 990428 Ltr
ML18152B6511999-03-31031 March 1999
Monthly Operating Repts for Mar 1999 for Surry Power Station Units 1 & 2
ML18153A2741999-03-29029 March 1999
LER 99-002-00:on 990301,prematurely Released Fire Watches Resulted in Violation of TS 3.21.B.7.Caused by Inadequate Procedure.Procedure for Opening & Sealing Fire Stops Was Revised on 990212
ML18153A2681999-03-19019 March 1999
LER 98-013-01:on 981122,turbine/reactor Tripped on High Due to Short Circuit in Summator for MSL C Loop Channel III Flow Transmitter.Replaced 1-MS-FT1494 Summator & Module Repair Procedure Revised.With 9903190 Ltr
ML18152B7331999-02-28028 February 1999
Monthly Operating Repts for Feb 1999 for Surry Power Station,Units 1 & 2.With 990310 Ltr
ML18152B5421999-01-31031 January 1999
Monthly Operating Repts for Jan 1999 for Surry Power Station,Units 1 & 2.With 990210 Ltr
ML18151A3031999-01-29029 January 1999
ISI Summary Rept for 1998 Refueling Outage,Including Form NIS-1, Owners Rept for ISIs & Form NIS-2, Owners Rept for Repairs & Replacements.
ML18152B7261999-01-21021 January 1999
LER 99-001-00:on 981222,auxiliary Feedwater Pipe Support Missed Surveillance.Caused by Personnel Error.Station Deviation Rept Was Submitted.Two Supports in Question Received Required Code Insp & Were Found Acceptable
ML18152B6011998-12-31031 December 1998
Monthly Operating Repts for Dec 1998 for Surry Power Station,Units 1 & 2.With 990115 Ltr
ML18152B5781998-12-16016 December 1998
LER 98-014-00:on 981126,manual Reactor Trip in Response to Main Feedwater Regulating Valve Failure Occurred.Caused by Dislocation of Retaining Clip in Positioner.Control Room Operators Placed Unit in Safe,Shutdown Condition
ML18152B5811998-12-16016 December 1998
LER 98-013-00:on 981122,turbine/reactor Trip on High SG Level Occurred.Caused by Instrument Failure.Control Room Operators Placed Unit in Safe,Shutdown Condition
ML18152B7121998-12-0404 December 1998
LER 98-S01-00:on 981105,noted Failure to Deactivate Station Access Badge.Caused by Human Error.Licensee Will Now Deactivate Station Badges Before Clearance Is Revoked & Process for Badge Deactivations Have Been Strengthened
ML18152B7041998-12-0101 December 1998
LER 98-012-00:on 981102,noted That EDGs Were Concurrently Inoperable.Caused by Required Testing Per TS 3.16.B.1.a.2. Redundant EDG Was Returned to Svc within Two Hour Period, Following Satisfactory Testing.With 981201 Ltr
ML18152B7081998-11-30030 November 1998
Rev 0 to COLR for Surry 1 Cycle 16,Pattern Un.
ML18152B5721998-11-30030 November 1998
Monthly Operating Repts for Nov 1998 for Surry Power Station,Units 1 & 2.With 981214 Ltr
ML18152B6161998-11-0606 November 1998
LER 98-011-00:on 981008,diesel Driven Fire Pump Failed to Start During Performance of Monthly Operability Test.Caused by Faulty Overspeed Trip Device Failure.Diesel Driven Fire Pump Declared Inoperable
ML18152B6241998-10-31031 October 1998
Monthly Operating Repts for Oct 1998 for Surry Power Station Units 1 & 2.With 981111 Ltr
ML18152B6081998-10-23023 October 1998
LER 98-010-01:on 980715,intake Canal Level Probes Were Inoperable Due to Marine Growth.Caused by Design of Canal Level Instrumentation.Canal Level Probes Will Continue to Be Monitored More Closely
ML18152B6881998-09-30030 September 1998
Monthly Operating Repts for Sept 1998 for Surry Power Station Units 1 & 2.With 981012 Ltr
ML18153A3271998-08-31031 August 1998
Monthly Operating Repts for Aug 1998 for Surry Power Station,Units 1 & 2
ML18152B7811998-07-31031 July 1998
LER 98-010-00:on 980715,low Intake Canal Level Instrument Channel I Was Declared Inoperable to Allow Testing of Intake Canal Level Probe 1-CW-LE-102.Subject Probe Was Cleaned by Diver,Tested & Channel I Was Returned to Operable Status
ML18153A3161998-07-31031 July 1998
Monthly Operating Repts for July 1998 for Surry Power Station Units 1 & 2.W/980807 Ltr
ML18152B7621998-06-30030 June 1998
Monthly Operating Repts for June 1998 for Surry Power Station,Units 1 & 2.W/980707 Ltr
ML18153A2581998-06-0303 June 1998
LER 98-009-00:on 980509,nonisolable Leak of Reactor Coolant Pump Seal Injection Line Weld,Was Discovered.Caused by Lack of Fusion or Thermal Fatigue Coupled W/Vibration Stress Due to Loose Rod Hanger.Rcp Seal Injection Line Removed
ML20248F7441998-05-31031 May 1998
Reactor Vessel Working Group,Response to RAI Regarding Reactor Pressure Vessel Integrity
ML18153A3141998-05-31031 May 1998
Monthly Operating Repts for May 1998 for Surry Power Station,Units 1 & 2.W/980610
ML18152B8241998-05-22022 May 1998
LER 98-008-00:on 980228,auxiliary Ventilation Fans Were Noted in Condition Outside of Design Basis.Caused by Failure to Recognize Potential Impact of Certain Design Basis Accident Scenarios.No Corrective Actions Needed
ML18152B8161998-04-30030 April 1998
Monthly Operating Repts for Apr 1998 for Surry Power Station Units 1 & 2.W/980508 Ltr
ML18152B7951998-04-29029 April 1998
LER 98-007-00:on 980330,radiation Monitors Were Declared Inoperable.Caused by Change in Operating Temperature Range. Preplanned Alternate Method of Monitoring Was Initiated IAW TS Table 3.7-6
ML18153A2511998-04-22022 April 1998
LER 98-006-00:on 980324,unisolable Through Wall Leak of RCP Thermowell Was Noted.Cause of Leak Is Unknown.Rtd Will Be Replaced
ML18153A2521998-04-22022 April 1998
LER 98-005-01:on 980212,fire Watch Insp Exceeded One Hour. Caused by Lack of Attention to Detail by Individual Involved.Individual Involved Was Coached on Requirement to Perform Fire Watch Patrols within Required Time Frame
ML20217P9941998-04-0707 April 1998
Safety Evaluation Granting Licensee Third 10-yr Inservice Insp Program Relief Requests SR-018 - Sr-024
ML18153A2951998-03-31031 March 1998
Monthly Operating Repts for Mar 1998 for Sps,Units 1 & 2.W/ 980408 Ltr
ML18153A2391998-03-13013 March 1998
LER 98-005-00:on 980212,fire Watch Insp Frequency Exceeded One H Occurred.Category 2 Root Cause Evaluation Being Conducted to Determine Cause of Event.Station Deviation Issued
ML18153A2341998-03-0909 March 1998
LER 98-003-00:on 980226,no Procedural Guidance for Maintaining EDG Minimum Fuel Supply During Loop,Was Identified.Caused by Absence of Procedural Instructions. Deviation Rept Submitted to Document Deviating Condition
ML18153A2301998-03-0606 March 1998
LER 98-004-00:on 980206,fire Watch Was Released Prematurely Resulting in Violation of Ts.Caused by Inadequate Planning of Repair Activity.Work Orders Will Include Ref to Applicable Procedures Developed to Assist in Repairs
ML18153A2251998-03-0404 March 1998
LER 98-002-00:on 980202,automatic Turbine Trip Resulted in Automatic Reactor Trip.Caused Degraded Generator Voltage Regulator sub-component Failure.Placed Plant in Safe Hot SD & Replaced Intermittent Relay & Relay Socket
1999-09-30
[Table view] |
Text
NRC FORM 366 (7-77)
CONTROL BLOCK: !
1'--------"--'-------"----:,6 ~
LICENSEE EVENT REPORT 10
. C L E A R REGULATORY COMMISSION (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATIONI LU2]
~ 8 lV 9
IA I s I p I s I 1 101 0 i.lCENSE!: CODE 1" 15 I0 I- I o I o I a I o I a I - I o I o2S10126 4 I 1! 11 TYPE LICENSE NUMBER LICENSE 1! 1101 30 :7 CAT I 58I*
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- VENT D:SCRIPTION AND PROBABLE CONSEQUENCES @
I Westinghouse has identified a potential system interaction concern involving the
[£ID I volume control tank (VCT) level control .system and charging pumps. A postulated
[ill] I failure of the VCT level control system,' without operator intervention, could lead
[QJ]J I to a loss of suction fluid for the charging pumps. Numerous visual and audible
[IJTI / indications are available to the operator to pemit the termination of this
[£JJJ jpostulated event. The health*and safety of the public were not affected. This
- [II)) 1 event is reportable per T.S.- 6.6.2.a(9).
I 7 8 9 80 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCDDE
[ill] IP \CI@ w@ ~@ Iz Iz I z 1 z I z I z 1@ ~@ Lu@
7 B 9 10 11 12 1:l 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION Q. LER/RO CVENT YEAR REPORT NO. CODE TYPE NO.
'0 REPOR7 NUMBER l8 I 11 Io 10 I 9 I 10 11 I Lu L~J .
21 22 24 26 28 29 30 *:i:z AC.ION FUTURE EFFECT SHUTDOWN . '* (.;::::\ ATTACHMENT*
- NPRD~ PRIME COMP.,--*** COMPONEN":".
7AKEN ACTION ON PLANT ME;THOD . HOURS ~ SUBMITTED FOAM SUB. SUPPLIER ** ** MANUFACTURER I 11 l@l£J@)
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43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS @
The cause of this concern appeared to be one of design criteria interpretatio1J..,_~__Jb~
operating staff has been alerted to this potential problem and rhe _consequences.
IT))] I Mi.nor. modifications to Unit No. l and 2 pr_ocedures wi 11 be made to provide additional!
CiJdJ I guidance.
ITEla 1 9 80 FAClLITY (JO' ~00~ ~
STATUS % FOWER OTHER STATUS \::::::,1 DISCOVERY DISCOVERY DESCRIPTION '5 t2TIJ ~:@) ! 0 I O j O 111...._D_e_fu_e_l_ed_ _ .__j Ll2.J<22)~1~F~~x~t~e~r~n~a~l=--~S~ou=r=-=-c=e........._..,.......................- .............................................---i 7 8 9 10 11 1'3 44 45 46 80 ACTIVITY CONTENT Q\
RELEASEO OF RELEASE AMOUNT OF ACTIVITY~ _LOCATION OF RELEASE @
C::fil L1J@ I z 1@)11...._.;.:.N:,.:./A~-----.....J 7 3 9 10 11 44 45 80
?!:RSONNEL EXPOSURES r::;:;,..
NUMBE"l A TYP: DESCRIPTiON U2] JO I OJ ':lJ0L.B@L........._____N_/A_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.........,,__..
a s n 12 13 80
~ERSONNEL INJURIES Q NUMBER DESCRIPTIONO GliJ OJ O I O l@L..........------~t.:.:..1/.:.:.A_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _-___.
a s *
- 11 12 eo LOSS OF OR DAMAGE TO FACILITY ~
- -vpe DESCRIPTION \
- :;J
[2]Ij ~{§)L.........._.__________;.,:.:1/~A:.........._ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _____.
- 8 9 10 so PUBLICITY G\ NRC USE ONLY ISSUED(,
- ";\ DESCRIPTION~ "'
LiliJ IN 1e, S 9 10.
NA 68 1 1 1, 1 1 1 69 1 1 1 1~
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ATTACHMENT 1 SURRY POWER STATION, UNIT NO.
DOCKET NO: 50-280 REPORT NO: 81-009/017-0 EVENT DATE: 05-22-81 TITLE OF EVENT: VCT LEVEL SYSTEM DESIGN PROBLEM
- 1. DESCRIPTION OF EVENT:
Westinghouse has identified a potential system interaction involving the volume control tank (VCT) level control system and the charging pumps.
A postulated failure (failed high) of the VCT level control system, without operator intervention, could lead to a possible loss of suction fluid for the charging pumps.
This is reportable per Tech. Spec. 6.6.2.a (9).
- 2. ~ PROBABLE CONSEQUENCES arid STATUS of REDUNDANT EQUIPMENT:
The VCT is the normal supply to the charging pumps. The RWST is the alternate and accident supply to the charging pumps. If VCT level. transmitter (LT-115) failed high, letdown* to the VCT would be diverted to the Primary Drain Tank.
The auto~attc mak~ up to the VCT and the automatic transfer to the RWST, on
.. *VCH.. Low*-low level, would not_be funq,ional; Throughout this event, numerous
,set.onda ry *ind i caFons (VCT pressure, charging pressure and f 1ow) and a 1arms would be available to the operator for system evalua~ion. In addition, redundant VCT level indication (Ll-112), located near the VCT, would be available.
Westinghouse has indicated that the operator would have approximately 10 minutes to transfer the charging pump suction from the VCT to the RWST or initiate other appropriate corrective actions to prevent possible damage to the operating charging pump.
The failure of the VCT level control system will not prevent the manual transfer of charging pump suction* to the RWST or the automatic transfer to the RWST during an accident.
Since num~r6us visual and audible indications are available to the operator to permit the termination of this postulated event, the health and safety of the public would not be affected.
- 3. CAUSE:
The cause . of this.cconcern .appeared to be one of design criteria interpretation.
- 4. IMMEDIATE CORRECTIVE ACTl'ON:
The operating staff was alerted to this potential problem and the consequences.
ATTACHMENT 1 (continued)
SURRY POWER STATION, UNIT NO.
- DOCKET NO: 50-280 REPORT NO: 81-009-017-0 EVENT DATE: 05-22-81
- 5. SUBSEQUENT CORRECTIVE ACTION:
A review of station procedures was conducted, and as a result, minor modifi-cations (clarifications) will be made. )n addition, the postulated event, the consequences and the required corrective actions will be included in the operator's training/retraining program.
- 6. ACTION TAKEN TO PREVENT RECURRENCE:
At this time, none is deemed necessary.
- 7. GENERIC IMPLICATIONS:
This concern is generic to both Unit No. 1 and 2, therefore, Unit No. 2 procedures will be modified .
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