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| #REDIRECT [[PNO-II-88-015A, analysis of Reactor Water Sample Indicates That Concentrations of Radionuclides Less than NRC Limit for Release to Unrestricted Area.Cold Leg Has Been Drained & Leg Currently Being Drained]]
| | {{Adams |
| | | number = ML20212C652 |
| | | issue date = 03/01/1988 |
| | | title = PNO-II-88-015:on 880229,licensee Informed NRC That Unit,A 1 Mwt Pool Reactor Had Been Shut Down Due to Primary Coolant Leak Outside Containment.Region II Has Dispatched Both Health Physics & Operations Inspector to Review Event |
| | | author name = Fredrickson P |
| | | author affiliation = NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| | | addressee name = |
| | | addressee affiliation = |
| | | docket = 05000297 |
| | | license number = |
| | | contact person = |
| | | document report number = PNO-II-88-015, PNO-II-88-15, NUDOCS 9710300072 |
| | | document type = PRELIMINARY NOTIFICATION OF EVENT OR OCCURRENCE (PNO,, TEXT-INSPECTION & AUDIT & I&E CIRCULARS |
| | | page count = 1 |
| | }} |
| | {{#Wiki_filter:- _ _ _ _ . . _ _ _ _ _ _ _ - _ _ _ _ . |
| | &&M Y( March 1, 1988 fv PRELIMINARYNOTIFICATIONOFEVENTORUNUSUALOCCURRENCEPNO-II-88h5 This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or i public interest significance. The information is as initially received without verifi-cation or evaluation, and is basically all that is known by the Region 11 staff on _this date. |
| | FACILITY: North Carolina State University Licensee Emergency Classification: |
| | Pulstar Notification of Unusual Event Docket No. 50-297 Alert ! |
| | Site Area Emergency ; |
| | General Emergency X Not Applicable |
| | |
| | ==SUBJECT:== |
| | REACTOR COOLANT LEAK IN UNRESTRICTED AREA On 2/29/88, the licensee informed the NRC that the unit, a 1 MWt pool reactor, had been shut down due to a primary coolant leak outside containment. The last time the reactor had been operated was 2/26/88. The leak was isolated on 2/29. Coolant loss is believed to have been slowly increasing for several weeks. It became obvious as a leak when, over the last week the loss increased from 60 gpm to approximately 180 gallons per day (gpd), which is significantly higher than the normal pump-seal and evaporative losses. The February pool water sample contained 2.88 E-6 uCi ml (MPC IE-4) of Mn56; 7.79 E-7 uC1/ml (MPC 2E-4) |
| | ! of Na 24; and less than 3.1 x 10-5 uC1/ml of tritium (MPC 3 E-3). The licensee is taking additional _ samples of the pool water for analysis. |
| | f The portions of piping that are outside the facility include several hundred feet of 10" |
| | ( stainless steel pipe and a Nitrogen 16 delay tank. Piping is buried between 5 and 15 feet underground. The hot leg (119') and cold leg (104') were pressure drop tested and the leak-has tentatively been located in the cold leg. Radiation levels and contamination levels on the; soil above _the pipe are not above background. Measurements of wet spots inside the reactor building air intake cubicle, located outside the containment where the pipes emerge from the soil, showed contamination levels below 1000 dpm/100cm2 Access to this cubicle is controlled by a locked grating. The licensee is reviewing the situation and has agreed to'not restart without NRC notification. Region 11 has dispatched both a health physics and operations inspector to review the event and evaluate corrective actions. The licensee |
| | 'is considering issuing a press release. |
| | The' State of North Carolina was informed by the licensee. |
| | The NRC received initial notification of this event by telephone from the licensee at 4:30 p.m. (EDT) on February 29, 1988. |
| | This information is current as of 10:30 a.m. (EST) on March 1,1988, CONTACT: P..Fredrickson - 242-5649 1/ |
| | 5 g \ |
| | ", C/R Distribution: |
| | , Chm, Cmrs |
| | 'SECY, Records.,GPA, GC' CA, PDR, Historian,, |
| | '( |
| | v 5X036 9710300072 880301 PDR I8sE PNO-II-88-015 PDR |
| | _}} |
| | |
| | {{PNO-Nav|region=II}} |
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Category:PRELIMINARY NOTIFICATION OF EVENT OR OCCURRENCE (PNO
MONTHYEARPNO-II-88-015B, on 880229,licensee Informed NRC That 1 Mwt Pool Reactor Had Been Shutdown Due to Primary Coolant Leak Outside Containment.Two Leaks Identified.Util Plans to Isolate Leak & Test Further to Assure That Leak Is in Liner1988-03-24024 March 1988 PNO-II-88-015B:on 880229,licensee Informed NRC That 1 Mwt Pool Reactor Had Been Shutdown Due to Primary Coolant Leak Outside Containment.Two Leaks Identified.Util Plans to Isolate Leak & Test Further to Assure That Leak Is in Liner PNO-II-88-015A, analysis of Reactor Water Sample Indicates That Concentrations of Radionuclides Less than NRC Limit for Release to Unrestricted Area.Cold Leg Has Been Drained & Leg Currently Being Drained1988-03-0303 March 1988 PNO-II-88-015A:analysis of Reactor Water Sample Indicates That Concentrations of Radionuclides Less than NRC Limit for Release to Unrestricted Area.Cold Leg Has Been Drained & Leg Currently Being Drained PNO-II-88-015, on 880229,licensee Informed NRC That Unit,A 1 Mwt Pool Reactor Had Been Shut Down Due to Primary Coolant Leak Outside Containment.Region II Has Dispatched Both Health Physics & Operations Inspector to Review Event1988-03-0101 March 1988 PNO-II-88-015:on 880229,licensee Informed NRC That Unit,A 1 Mwt Pool Reactor Had Been Shut Down Due to Primary Coolant Leak Outside Containment.Region II Has Dispatched Both Health Physics & Operations Inspector to Review Event PNO-V-88-013A, on 880114,reactor Bldg Overpressurization Occurred.Investigation Revealed That High/Low Pressure Trip Circuit for Train 'B' Fan Trip Circuit Inoperable.Licensee Continuing Investigation to Determine Root Cause1988-02-19019 February 1988 PNO-V-88-013A:on 880114,reactor Bldg Overpressurization Occurred.Investigation Revealed That High/Low Pressure Trip Circuit for Train 'B' Fan Trip Circuit Inoperable.Licensee Continuing Investigation to Determine Root Cause 1988-03-03
[Table view] Category:TEXT-INSPECTION & AUDIT & I&E CIRCULARS
MONTHYEARIR 05000297/19992011999-03-0202 March 1999 Insp Rept 50-297/99-201 on 990209-12.No Violations Noted. Major Areas Inspected:Routine,Announced Insp Included Onsite Review of Various Aspects of Licensee Programs Concerning Conduct of Operations & Emergency Preparedness ML20217C0501998-03-18018 March 1998 Notice of Violation from Insp on 980120-23.Violation Noted: Licensee Developed Various Health Physics Instructions That Were Reviewed & Approved by Reactor Health Physicist,But Not by Radiation Protection Committee ML20217C0721998-03-18018 March 1998 Insp Rept 50-297/98-201 on 980120-23.Violations Noted.Major Areas inspected:on-site Review of Selected Aspects of Licensee Class II Nonpower Research Reactor Operation Including;Safeguards,Security Program & Matl Control IR 05000297/19972011997-09-0909 September 1997 Insp Rept 50-297/97-201 on 970609-12.No Violations Noted. Major Areas Inspected:Review of Selected Conditions & Records Since Last Insp & Verification of CA Previously Committed to by Licensee IR 05000297/19930021993-10-15015 October 1993 Partially Withheld Insp Rept 50-297/93-02 on 930928-29 (Ref 10CFR2.790).No Violations Noted.Major Areas Inspected: Procedures,Fixed Site Physical Protection of Special Nuclear Matl of Low Strategic Significance & Matl Control ML20217C6691991-07-0808 July 1991 Exam Rept 50-297/OL-91-01 on 910603-04.Exam Results:Both Applicants Passed Exam IR 05000297/19900021990-11-14014 November 1990 Insp Rept 50-297/90-02 on 901029-1101.No Violations or Deviations Noted.Major Areas Inspected:Review & Oversight of Reactor Activities IR 05000297/19890031989-09-28028 September 1989 Partially Withheld Insp Rept 50-297/89-03 on 890907 (Ref 10CFR2.790).No Violations or Deviations Noted.Major Areas Inspected:Nuclear Matl Accounting Records & Repts & Physical Inventory IR 05000297/19890021989-09-15015 September 1989 Partially Withheld Insp Rept 50-297/89-02 on 890817 (Ref 10CFR2.790).No Noncompliance Noted.Major Areas Inspected: Plans & Procedures,Repts of Safeguards Events & Fixed Site Physical Protection of SNM of Low Strategic Significance ML20245G2321989-08-0202 August 1989 Notice of Violation from Insp on 890628-30.Violations Noted: Failure to Provide Adequate Training to Radiation Safety Ofc Personnel Performing Contamination Surveys & Failure to Follow Environ Procedures for Collecting Air Filters ML20245G2371989-08-0101 August 1989 Insp Rept 50-297/89-01 on 890628-30.Violation Noted Major Areas Inspected:Staff Organization,Training,Radiation Control & Surveillance Activities,Environ Monitoring & Transportation Activities ML20205R0001988-11-0202 November 1988 Notice of Violation from Insp on 880926-29.Violation Noted: Failure to Have & Maintain Approved Procedures Utilized by Radiation Protection Ofc to Conduct Liquid Effluent & Environ Sample Radiological Analyses IR 05000297/19880041988-10-31031 October 1988 Insp Rept 50-297/88-04 on 880926-29.Violations Noted.Major Areas Inspected:Onsite Review of Licensee Radiation Protection Program,Including Staff Organization,Training, Radiation Control & Surveillance Activities ML20195J3641988-06-13013 June 1988 Notice of Violation from Insp on 880523-26.Violation Noted: Reactor Safeguards Advisory Group Did Not Meet During 870408-880225 IR 05000297/19880031988-06-0909 June 1988 Insp Rept 50-297/88-03 on 880523-26.Violation Noted.Major Areas Inspected:Recent Activities to Reduce & Monitor Pool Leakage & Completed Biennial Insp of Licensee ML20154D2561988-05-0505 May 1988 Exam Rept 50-297/OL-88-02 on 880426.Exam Results:Reactor Operator Passed IR 05000297/19880011988-04-0404 April 1988 Insp Rept 50-297/88-01 on 880301-04.No Violations or Deviations Noted.Major Areas Inspected:Leaks in RCS Piping Outside Reactor Bldg & in Isolable Portion of Reactor Primary Sys within Bldg PNO-II-88-015B, on 880229,licensee Informed NRC That 1 Mwt Pool Reactor Had Been Shutdown Due to Primary Coolant Leak Outside Containment.Two Leaks Identified.Util Plans to Isolate Leak & Test Further to Assure That Leak Is in Liner1988-03-24024 March 1988 PNO-II-88-015B:on 880229,licensee Informed NRC That 1 Mwt Pool Reactor Had Been Shutdown Due to Primary Coolant Leak Outside Containment.Two Leaks Identified.Util Plans to Isolate Leak & Test Further to Assure That Leak Is in Liner PNO-II-88-015A, analysis of Reactor Water Sample Indicates That Concentrations of Radionuclides Less than NRC Limit for Release to Unrestricted Area.Cold Leg Has Been Drained & Leg Currently Being Drained1988-03-0303 March 1988 PNO-II-88-015A:analysis of Reactor Water Sample Indicates That Concentrations of Radionuclides Less than NRC Limit for Release to Unrestricted Area.Cold Leg Has Been Drained & Leg Currently Being Drained PNO-II-88-015, on 880229,licensee Informed NRC That Unit,A 1 Mwt Pool Reactor Had Been Shut Down Due to Primary Coolant Leak Outside Containment.Region II Has Dispatched Both Health Physics & Operations Inspector to Review Event1988-03-0101 March 1988 PNO-II-88-015:on 880229,licensee Informed NRC That Unit,A 1 Mwt Pool Reactor Had Been Shut Down Due to Primary Coolant Leak Outside Containment.Region II Has Dispatched Both Health Physics & Operations Inspector to Review Event ML20150B2371988-02-23023 February 1988 Exam Rept 50-297/OL-88-01 on 880202-03.Exam Results:One of Two Reactor Operators Passed Written Exam & Operating Exam & Senior Reactor Operator Passed Both Exams PNO-V-88-013A, on 880114,reactor Bldg Overpressurization Occurred.Investigation Revealed That High/Low Pressure Trip Circuit for Train 'B' Fan Trip Circuit Inoperable.Licensee Continuing Investigation to Determine Root Cause1988-02-19019 February 1988 PNO-V-88-013A:on 880114,reactor Bldg Overpressurization Occurred.Investigation Revealed That High/Low Pressure Trip Circuit for Train 'B' Fan Trip Circuit Inoperable.Licensee Continuing Investigation to Determine Root Cause ML20235W0801987-10-0909 October 1987 Notice of Violation from Insp on 870929-30.Violation Noted: Operating Procedures for Radiation Control Not Written &/Or Followed for Listed Incidents ML20235W0881987-10-0707 October 1987 Insp Rept 50-297/87-03 on 870929-30.Violations Noted. Major Areas Inspected:Internal & External Exposure Control & Assessment,Control of Radioactive Matl & Contamination, Surveys,Monitoring & Transportation of Radioactive Matl ML20206D3851987-04-0202 April 1987 Notice of Violation from Insp on 870316-18 IR 05000297/19870011987-03-27027 March 1987 Insp Rept 50-297/87-01 on 870316-18.Violations Noted:Failure to Post Required Documents,Failure to Comply W/Dot Requirements for Transportation of Radioactive Matls & Failure to Verify Authorization of Intended Recipient IR 05000297/19860021986-06-0404 June 1986 Partially Withheld Insp Rept 50-297/86-02 on 860521-22 (Ref 10CFR2.790 & 73.21).No Noncompliance Noted.Major Areas Inspected:Plans & Procedures,Safeguards Events Repts & Low Strategic Significance SNM Fixed Physical Protection ML20211A4381986-05-19019 May 1986 Exam Rept 50-297/OL-86-01 on 860423-24.Exam Results:All Five Candidates Passed Oral & Written Exams IR 05000297/19860011986-05-14014 May 1986 Insp Rept 50-297/86-01 on 860414-18.No Violation or Deviation Noted.Major Areas Inspected:Biennial Research Reactor Insp,Including Logs & Records,Review & Audit, Requalification Training & Procedures ML20054H0981982-04-21021 April 1982 Notice of Violation from Insp on 820315-19 IR 05000111/19820021982-04-21021 April 1982 IE Insp Repts 50-111/82-02 & 50-297/82-01 on 820315-19. Noncompliance Noted:Control Room Left Unattended & Reactor Safeguards Advisory Group Not Convened Semiannually IR 05000160/19780041978-10-20020 October 1978 IE Inspec Repts 50-160/78-04, 50-276/78-02, 50-297/78-04 & 70-0386/78-04 on 780926-27 During Which No Items of Noncompliance Were Noted.Major Areas Inspec Incl:Nuc Matl Control & Accounting Procedures Review IR 05000297/19780031978-10-0202 October 1978 Inspec Rept 50-297/78-03 on 780817 During Which No Items of Noncompliance Were Noted.Major Area Inspected:Physical Security Plan 1999-03-02
[Table view] |
- _ _ _ _ . . _ _ _ _ _ _ _ - _ _ _ _ .
&&M Y( March 1, 1988 fv PRELIMINARYNOTIFICATIONOFEVENTORUNUSUALOCCURRENCEPNO-II-88h5 This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or i public interest significance. The information is as initially received without verifi-cation or evaluation, and is basically all that is known by the Region 11 staff on _this date.
FACILITY: North Carolina State University Licensee Emergency Classification:
Pulstar Notification of Unusual Event Docket No. 50-297 Alert !
Site Area Emergency ;
General Emergency X Not Applicable
SUBJECT:
REACTOR COOLANT LEAK IN UNRESTRICTED AREA On 2/29/88, the licensee informed the NRC that the unit, a 1 MWt pool reactor, had been shut down due to a primary coolant leak outside containment. The last time the reactor had been operated was 2/26/88. The leak was isolated on 2/29. Coolant loss is believed to have been slowly increasing for several weeks. It became obvious as a leak when, over the last week the loss increased from 60 gpm to approximately 180 gallons per day (gpd), which is significantly higher than the normal pump-seal and evaporative losses. The February pool water sample contained 2.88 E-6 uCi ml (MPC IE-4) of Mn56; 7.79 E-7 uC1/ml (MPC 2E-4)
! of Na 24; and less than 3.1 x 10-5 uC1/ml of tritium (MPC 3 E-3). The licensee is taking additional _ samples of the pool water for analysis.
f The portions of piping that are outside the facility include several hundred feet of 10"
( stainless steel pipe and a Nitrogen 16 delay tank. Piping is buried between 5 and 15 feet underground. The hot leg (119') and cold leg (104') were pressure drop tested and the leak-has tentatively been located in the cold leg. Radiation levels and contamination levels on the; soil above _the pipe are not above background. Measurements of wet spots inside the reactor building air intake cubicle, located outside the containment where the pipes emerge from the soil, showed contamination levels below 1000 dpm/100cm2 Access to this cubicle is controlled by a locked grating. The licensee is reviewing the situation and has agreed to'not restart without NRC notification. Region 11 has dispatched both a health physics and operations inspector to review the event and evaluate corrective actions. The licensee
'is considering issuing a press release.
The' State of North Carolina was informed by the licensee.
The NRC received initial notification of this event by telephone from the licensee at 4:30 p.m. (EDT) on February 29, 1988.
This information is current as of 10:30 a.m. (EST) on March 1,1988, CONTACT: P..Fredrickson - 242-5649 1/
5 g \
", C/R Distribution:
, Chm, Cmrs
'SECY, Records.,GPA, GC' CA, PDR, Historian,,
'(
v 5X036 9710300072 880301 PDR I8sE PNO-II-88-015 PDR
_