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 Issue dateTitleTopic
DCL-21-036, One Hundred Eighty Day Steam Generator Report for Diablo Canyon Power Plant Unit 1 Twenty-Second Refueling Outage22 April 2021One Hundred Eighty Day Steam Generator Report for Diablo Canyon Power Plant Unit 1 Twenty-Second Refueling OutageNondestructive Examination
IR 05000032/20060053 April 2007Errata for Diablo Canyon Power Plant - NRC Inspection Report 05000275-06-005; 0500032-06-005 and 07200026-06-002Significance Determination Process
IR 05000133/201700319 October 2017Inspection Report 05000133/2017003
IR 05000275/197000126 May 1970Insp Rept 50-275/70-01 on 700416-17.No Noncompliance Noted. Major Areas Inspected:Review of Primary Loop Spool Piece FabricationHydrostatic
IR 05000275/197800726 May 1978IE Insp Rept 50-275/78-07 on 780227-0303.No Deviations or Items of Noncompliance Noted.Major Areas Inspected:Emergency Planning.Related Encls Include Various Allegations,Qa Matl & I Yin Notes.Partially Withheld Interviews & Notes Also Encl
IR 05000275/198201228 July 1982IE Insp Repts 50-275/82-12 & 50-323/82-07 Have Been Canceled
IR 05000275/19820138 July 1982Ack Receipt of Informing NRC of Steps Taken to Correct Violations Noted in IE Insp Rept 50-275/82-13
IR 05000275/198201511 June 1982IE Safeguards Insp Rept 50-275/82-15 on 820524-28.No Noncompliance Noted.Major Areas Inspected:Security Plan & Implementing Procedures,Security Organization Mgt & Security Program Audit.Details Withheld (Ref 10CFR73.21)
IR 05000275/198201611 June 1982IE Insp Repts 50-275/82-16 & 50-323/82-09 on 820329-0402 & 0510-14.Noncompliance Noted:Class I Matl Released for Const Prior to Satisfying Established Matl Receiving,Handling & Processing QC Procedures
IR 05000275/198201815 June 1982IE Insp Rept 50-275/82-18 on 820426-30.No Noncompliance Noted.Major Areas Inspected:Plant Layout,General Employee Training,Chemistry & Radiation Protection Staff Training & NUREG-0737,Items II.B.3 & II.F.1
IR 05000275/198201918 June 1982IE Insp Rept 50-275/82-19 on 820502-0604.No Noncompliance Noted.Major Areas Inspected:Plant Operations,Surveillance Testing,Physical Security,Maint,Ler Followup & QA Program
IR 05000275/198202028 June 1982IE Insp Repts 50-275/82-20 & 50-323/82-10 on 820506-28.No Noncompliance Noted.Major Areas Inspected:Implementation of Independent Verification Program Including Independence & Qualification of Personnel & Exam of QA Programs
IR 05000275/198202119 July 1982IE Insp Rept 50-275/82-21 on 820606-0703.No Noncompliance Noted.Major Areas Inspected:Plant Operations,Surveillance Testing,Physical Security,Maint,Ler Followup & Licensee QA Program
IR 05000275/198202226 July 1982IE Insp Repts 50-275/82-22 & 50-323/82-11 on 820526-28 & 0628-0702.No Noncompliance Noted.Major Areas Inspected: Action on Previous Items,Mods to Piping & Electrical Raceway Supports & Unit 2 VesselNondestructive Examination
Emergency Lighting
IR 05000275/198202330 July 1982IE Insp Repts 50-275/82-23 & 50-323/82-12 on 820721-23.No Noncompliance Noted.Major Areas Inspected:Followup on IE Circulars,Info Notices & Bulletins,Preoperational Testing & Monitoring CalibrGrab sample
IR 05000275/19820242 August 1982IE Insp Rept 50-275/82-24 on 820712-15.No Noncompliance Noted.Major Areas Inspected:Plant Operations,Onsite Review Committee & Independent Insp
IR 05000275/19840056 June 1984IE Insp Rept 50-275/84-05 on 840326-30.No Violations or Deviations Noted.Major Areas Inspected:New Chemistry & Radiation Protection Dept Organization,Radiation Protection Training,Followup on Noncompliance & IE Info Notices
IR 05000275/198400721 June 1984Forwards Special Insp Rept 50-275/84-07 Re Performance of Plant Operating Crews,Conducted by Region V,Lll & Eg&G Idaho,Inc.Performance Above Average Compared to Similar Licensed Facilities
IR 05000275/198501228 March 1985Forwards Safeguards Insp Repts 50-275/85-12 & 50-323/85-11 on 850304-08 & Notice of Violation.Rept & Notice of Violation Withheld (Ref 10CFR73.21)
IR 05000275/19850143 April 1985Insp Repts 50-275/85-14 & 50-323/85-02 on 850304-08.No Noncompliance or Deviation Noted.Major Areas Inspected:Area Insp,Licensee Actions on Previously Identified Items,Ie bulletins,10CFR50.55(e) Items & TMI Task Action Items
IR 05000275/198502330 July 1985Insp Rept 50-275/85-23 on 850610-28.Violation Noted: Weaknesses in Implementation of Qa/Qc Program Re Control of Measuring & Test Equipment & Unqualified Individual Assigned as TechnicianFitness for Duty
High Radiation Area
Probabilistic Risk Assessment
Temporary Modification
IR 05000275/198502414 August 1985Insp Rept 50-275/85-24 on 850603-07.No Violations or Deficiencies Noted.Major Areas Inspected:Emergency Response Facilities Compliance W/Suppl 1 to NUREG-0737,including Technical Support Ctr & Operational Support Ctr
IR 05000275/19850328 October 1985Insp Repts 50-275/85-32 & 50-323/85-29 on 850818-0928. Violation Noted:Nrc Inspector,Not on Approved Access List, Entered Class 1 safety-related Matl Storage Area UnescortedBoric Acid
Stroke time
IR 05000275/198503630 December 1985Requests NRR Assume Lead Responsibility for Evaluation & Resolution of Unresolved Item 50-275/85-36-04 Re Fire DampersSafe Shutdown
Fire Barrier
Emergency Lighting
Continuous fire watch
Fire Watch
Hourly Fire Watch
IR 05000275/19850389 December 1985Insp Repts 50-275/85-38 & 50-323/85-36 on 851118-22.No Violation or Deviation Noted.Major Areas Inspected:Action on Previous Findings,Transportation Activities,Solid Waste Mgt Program,Low Level Waste Mgt & Licensee EventsHigh Radiation Area
Process Control Program
Exclusive Use
IR 05000275/19850418 April 1986Ack Receipt of 860224 & 0325 Ltrs Informing NRC of Steps Taken to Correct Violations Noted in Insp Repts 50-275/85-41 & 50-323/85-39
IR 05000275/19850429 January 1986Forwards Safeguards Insp Repts 50-275/85-42 & 50-323/85-43 on 851216-20 & Notice of Violation.Rept & Notice of Violation Withheld (Ref 10CFR73.21 & 2.790)
IR 05000275/19850447 March 1986Ack Receipt of Informing NRC of Steps Taken to Correct Violations Noted in Insp Rept 50-275/85-44
IR 05000275/198504523 April 1986Ack Receipt of Informing NRC of Steps Taken to Correct Violations Noted in Insp Repts 50-275/85-45 & 50-323/85-44
IR 05000275/19860023 June 1986Ack Receipt of Informing NRC of Steps Taken to Correct Violations Noted in Insp Repts 50-275/86-02 & 50-323/86-02
IR 05000275/19860095 June 1986Ack Receipt of Informing NRC of Steps Taken to Correct Violations Noted in Insp Rept 50-275/86-09
IR 05000275/198601116 June 1986Ack Receipt of Informing NRC of Steps Taken to Correct Violations Noted in Insp Repts 50-275/86-11 & 50-323/86-12
IR 05000275/19860149 May 1986Enforcement Conference Repts 50-275/86-14 & 50-323/86-15 on 860425.Major Area Discussed:Licensee Action Plan to Correct Problem of Missed Tech Spec Surveillances.Noncompliance Noted Re Followup of LERsMissed surveillance
IR 05000275/19860155 June 1986Insp Rept 50-275/86-15 on 860428-0502.No Violations Noted. Major Areas Inspected:Operation,Maint & Surveillance Testing of Auxiliary Feedwater Sys.Unresolved Item Re Automatic Feedwater Sys Operability During Pump Maint Identified
IR 05000275/19860223 September 1986SALP Repts 50-275/86-22 & 50-323/86-22 for Aug 1985 - Jul 1986Missed surveillance
Systematic Assessment of Licensee Performance
IR 05000275/19860243 October 1986Forwards Safeguards Insp Repts 50-275/86-24 & 50-323/86-24 on 860825-0903.No Violations Noted.Encl Withheld (Ref 10CFR73.21)
IR 05000275/198602517 September 1986Insp Rept 50-275/86-25 on 860825-29.No Violations Noted. Major Areas Inspected:Preparation for Refueling ActivitiesShutdown Margin
Reactor Vessel Water Level
IR 05000275/19860299 December 1986Discusses Insp Rept 50-275/86-29 on 860928-1108 & Mgt Meeting Rept 50-275/86-34 on 861124 & Forwards Notice of Violation
IR 05000275/198603230 January 1987Insp Repts 50-275/86-32 & 50-323/86-30 on 861109-1227 & 870116.No Violations or Deviations Noted.Major Areas Inspected:Plant Operations,Maint & Surveillance Activities, Followup of Onsite Events & AllegationsUnanalyzed Condition
Time of Discovery
Loop seal
Post Accident Monitoring
Anchor Darling
Missed surveillance
Earthquake
IR 05000275/198603317 March 1987Insp Repts 50-275/86-33 & 50-323/86-31 on 861215-19. Deficiencies Noted.Major Areas Inspected:Implementation Program for Establishing & Maintaining Environ Qualification of Electrical Equipment Important to Safety
IR 05000275/198700125 March 1987Insp Repts 50-275/87-01 & 50-323/87-01 on 870202-13. Violation Noted:Failure to Maintain Control Over LubricantsBoric Acid
Stroke time
Post Accident Monitoring
Probabilistic Risk Assessment
IR 05000275/19870024 February 1987Forwards Safeguards Insp Repts 50-275/87-02 & 50-323/87-02 on 870112-16 & Notice of Violation.Insp Repts & Notice of Violation Withheld (Ref 10CFR2.790)
IR 05000275/198700330 January 1987Insp Repts 50-275/87-03 & 50-323/87-03 on 870112-16.No Violations or Deviations Noted.Major Areas Inspected: Previous Insp Items,Transportation,Solid Waste,Licensee Identified Violation & Facility ToursHigh Radiation Area
Process Control Program
IR 05000275/198700420 February 1987Insp Repts 50-275/87-04 & 50-323/87-04 on 861228-870207.No Violations or Deviations Noted.Major Areas Inspected:Plant Operations,Maint & Surveillance Activities & Followup of Onsite Events,Open Items & LERsBoric Acid
Stroke time
Biofouling
IR 05000275/198700528 January 1987Insp Repts 50-275/87-05 & 50-323/87-05 on 870112-16.No Noncompliance or Deviations Noted.Major Areas Inspected: Followup of NRC Technical Audit Branch Rept on Allegation Re Flat Spot on Reactor Coolant Piping in Unit 1 ContainmentLiquid penetrant
IR 05000275/19870066 February 1987Insp Rept 50-275/87-06 on 870112-13.Violation Noted: Notification of 870102 Emergency Plan Unusual Event Did Not Occur Until 95 Minutes After Declaration
IR 05000275/198700712 February 1987Insp Repts 50-275/87-07 & 50-323/87-06 on 870202-06. No Items of Noncompliance or Deviations Identified.Major Areas Inspected:Design,Design Changes & Mods & Followup on IE Notices & Nonconformance ReptsMissed surveillance
IR 05000275/198700911 March 1987Insp Repts 50-275/87-09 & 50-323/87-08 on 870223-27.No Noncompliance Noted.Major Areas Inspected:Followup of IE Bulletins,Vital Areas & EquipmentTemporary Modification
Fire Watch
IR 05000275/19870188 May 1987Insp Repts 50-275/87-18 & 50-323/87-17 on 870420-24.No Noncompliance or Deviations Noted.Major Areas Inspected: Nonlicensed Staff Training,Followup of Part 21 Repts,Various Vital Areas & Equipment
IR 05000275/198702223 June 1987Insp Rept 50-275/87-22 on 870520-22.Major Areas Inspected: Followup on Allegation File Number RV-87-A-0094 & Followup on Regional Open Items List