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Category:CORRESPONDENCE-LETTERS
MONTHYEARML20216J9221999-09-28028 September 1999 Informs That DE Hughes,License SOP-10198-3,no Longer Working as Licensed Senior Reactor Operator with Penn State Univ, Effective 990731.Requests Appropriate Action to Remove Name from List of Active Licensees ML20248M0531998-06-0909 June 1998 Forwards Copy of Results of Operator Initial Exam Conducted at Pennsylvania State University on 980527-28.W/o Encl ML20203L3021998-02-27027 February 1998 Requests Addl Changes to Proposed Amend 32.Proposed Changes Are to Sections 3.4 & 3.5.Revised TS Amend Encl W/Changes & Repagination of Pages 12-22 & 42-44 ML20217R2911997-08-28028 August 1997 Informs That Pg Boyle License SOP-70072 No Longer Working as Licensed SRO W/Penn State Univ Breazeale Reactor Effective 970630 ML20198E9811997-08-0505 August 1997 Informs That Responsibility for Non-Power Reactor Insp Program Has Been Transferred from Regional Ofc to Nrr. Addresses Listed ML20137S4331997-04-0707 April 1997 Fulfills TS Requirement of Written Rept within 30 Days to NRC for Permanent Change in Facility Organization Involving Level 1 & 2 Personnel as Defined in Reactor Facility TSs ML20113E0761996-06-20020 June 1996 Forwards Results of Operator Initial Exam Conducted on 960610-11.W/o Encls ML20094P9041995-11-24024 November 1995 Advises That Aj Mclellan (SOP-70122) Has Resigned Position W/Penn State Univ Breazeale Reactor on 951110.Requests That NRC Take Appropriate Action to Remove Name from List of Active Licensees ML20090L2031992-03-10010 March 1992 Advises That Author Appointed to Position of Senior Vice President for Research & Dean of Graduate School,Effective 920301,replacing Cl Hosler ML20077J9091991-07-29029 July 1991 Notifies That on 910722 Facility Exhaust Sys Failed.Cause of Failure Was Breakdown of Insulation on Wiring That Supplies Power from Console Exhaust Sys Control Switches to Sys Relay Panel ML20076D8471991-07-25025 July 1991 Grants Permission to Issue Listed protected-proprietary Info in Support of 910708 Info Re Application for Amend to License R-2 ML20246P6181989-05-12012 May 1989 Forwards Safety Insp Rept 50-005/89-01 on 890501-02.No Violations Noted ML20154Q3321988-05-17017 May 1988 Forwards Description of Space Reassignment & Necessitated Changes to Physical Security Plan.Encl Withheld ML20154B3851988-05-0303 May 1988 Advises That Review & Evaluation of Pennsylvania State Univ Operator & Senior Operator Requalification Program Submitted on 871021 Completed & Acceptable.Request That Licensee Begin to Implement Approved Program Immediately ML20237H4851987-08-28028 August 1987 Forward Safety Insp Rept 50-005/87-03 on 870720-21.No Violations Noted ML20234A8141987-06-25025 June 1987 Forwards Exam Rept 50-005/87-02OL of Exam Administered on 870603-04 ML20198E5291985-10-18018 October 1985 Forwards Ltr of Transmittal for Rev to Security Plan Which Will Be Mailed on or About 851025.W/o Encl ML20098C8421984-09-21021 September 1984 Informs That Copies of NRC Approved Penn State Breazeale Nuclear Reactor Emergency Preparedness Plan Mailed to All Members of Emergency Organization & State of PA Emergency Mgt Agency.Plan Fully Implemented ML20040D6901982-01-21021 January 1982 Forwards Twenty-Sixth Annual Progress Rept of PA State Univ Breazeale Nuclear Reactor for Period Jul 1980-June 1981 & Repts Minor Changes Made During 1981 ML20039C4901981-12-18018 December 1981 Informs of Violation of Administrative Policy Which Requires Senior Reactor Operator at Control Console for All Power Level Changes.Reactor Shutdown on 811211 W/Only Licensed Operator Present.Procedures Will Be Discussed W/Operators ML19341B1931981-01-23023 January 1981 Submits Info Re Cost of Providing Addl Criticality Monitoring Sys at Facility.Requests 2-yr Exemption from Code Requirements ML19339C3761980-11-13013 November 1980 Forwards Revised Page 24 of Security Plan.Page Withheld (Ref 10CFR2.790) ML19210D0181979-11-13013 November 1979 Forwards Executed Amend 15 to Indemnity Agreement E-10 Defining Course of Transportation ML20125A6291979-06-22022 June 1979 Forwards IE Info Notice 79-16, Nuclear Incident at Tmi. No Action Required ML19289F6651979-06-11011 June 1979 Forwards Executed Amend 14 to Indemnity Agreement E-10 1999-09-28
[Table view] Category:INCOMING CORRESPONDENCE
MONTHYEARML20216J9221999-09-28028 September 1999 Informs That DE Hughes,License SOP-10198-3,no Longer Working as Licensed Senior Reactor Operator with Penn State Univ, Effective 990731.Requests Appropriate Action to Remove Name from List of Active Licensees ML20203L3021998-02-27027 February 1998 Requests Addl Changes to Proposed Amend 32.Proposed Changes Are to Sections 3.4 & 3.5.Revised TS Amend Encl W/Changes & Repagination of Pages 12-22 & 42-44 ML20217R2911997-08-28028 August 1997 Informs That Pg Boyle License SOP-70072 No Longer Working as Licensed SRO W/Penn State Univ Breazeale Reactor Effective 970630 ML20137S4331997-04-0707 April 1997 Fulfills TS Requirement of Written Rept within 30 Days to NRC for Permanent Change in Facility Organization Involving Level 1 & 2 Personnel as Defined in Reactor Facility TSs ML20113E0761996-06-20020 June 1996 Forwards Results of Operator Initial Exam Conducted on 960610-11.W/o Encls ML20094P9041995-11-24024 November 1995 Advises That Aj Mclellan (SOP-70122) Has Resigned Position W/Penn State Univ Breazeale Reactor on 951110.Requests That NRC Take Appropriate Action to Remove Name from List of Active Licensees ML20090L2031992-03-10010 March 1992 Advises That Author Appointed to Position of Senior Vice President for Research & Dean of Graduate School,Effective 920301,replacing Cl Hosler ML20077J9091991-07-29029 July 1991 Notifies That on 910722 Facility Exhaust Sys Failed.Cause of Failure Was Breakdown of Insulation on Wiring That Supplies Power from Console Exhaust Sys Control Switches to Sys Relay Panel ML20076D8471991-07-25025 July 1991 Grants Permission to Issue Listed protected-proprietary Info in Support of 910708 Info Re Application for Amend to License R-2 ML20154Q3321988-05-17017 May 1988 Forwards Description of Space Reassignment & Necessitated Changes to Physical Security Plan.Encl Withheld ML20198E5291985-10-18018 October 1985 Forwards Ltr of Transmittal for Rev to Security Plan Which Will Be Mailed on or About 851025.W/o Encl ML20098C8421984-09-21021 September 1984 Informs That Copies of NRC Approved Penn State Breazeale Nuclear Reactor Emergency Preparedness Plan Mailed to All Members of Emergency Organization & State of PA Emergency Mgt Agency.Plan Fully Implemented ML20040D6901982-01-21021 January 1982 Forwards Twenty-Sixth Annual Progress Rept of PA State Univ Breazeale Nuclear Reactor for Period Jul 1980-June 1981 & Repts Minor Changes Made During 1981 ML20039C4901981-12-18018 December 1981 Informs of Violation of Administrative Policy Which Requires Senior Reactor Operator at Control Console for All Power Level Changes.Reactor Shutdown on 811211 W/Only Licensed Operator Present.Procedures Will Be Discussed W/Operators ML19341B1931981-01-23023 January 1981 Submits Info Re Cost of Providing Addl Criticality Monitoring Sys at Facility.Requests 2-yr Exemption from Code Requirements ML19339C3761980-11-13013 November 1980 Forwards Revised Page 24 of Security Plan.Page Withheld (Ref 10CFR2.790) ML19210D0181979-11-13013 November 1979 Forwards Executed Amend 15 to Indemnity Agreement E-10 Defining Course of Transportation ML19289F6651979-06-11011 June 1979 Forwards Executed Amend 14 to Indemnity Agreement E-10 1999-09-28
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4 PENNSTATE %"'L Dasid A. Shirley The Penns)hania state University Senior Vice President for Research 207 Old Main and Graduate Education University Park, PA 16802-1503 February 6,1995 Nuclear Regulatory Commission Document Control Desk Washington, DC 20555 Re: Report of Changes from the Safety Analysisfeport of the Penn State Breazeale Reactor, License No. R-2, Docket No. 50-05
Dear Sir or Madam:
W is a report of changes from the Safety Analysis Report (S AR) of the above referenced facility being reported in accordance with Technical Specification 6.6.2.b.(2). This report is to inform the Nuclear Regulatory Commission ofinterim justification for continued operation within current licensing bases. An action plan is proposed to restore operation to the licensed reactor power of 1 MW.
Backcround The staff at PSDR have been concerned that the peak measured fuel temperature while operating at maximum licensed power (1 MW) with our present instrumented element has increased. In addition it came to the attention of the staff that the containment volume used in the SAR was somewhat higher than actual. In the process of investigating the change in the fuel handling accident consequences as a result of using a more accurate containment volume (1900 m3 vs. 2500 m3) the staff determined that the higher fuel temperatures wem of more importance than the change in volume. The decision was made to review the entire SAR before making any new changes.
The SAR states that by following the specific requirements stated in the Technical Specifications (i.e. Tech. Spec. Docket 50-005, amendment 23 section 3.1.5) that the maximum power density would not exceed 23.2 kW per element. As long as this power density is not exceeded the conclusions of the SAR fuel handling accident analysis are correct. The staff repeated the experiments that were used as the basis for the SAR analysis and found that the maximum power density during 1 MW operation with the present core loading (Loading 47) does exceed 23.2 kW per element. After this discovery on January 9,1995, power was reduced to 570 kW which lowers the operating temperatum and power density below that analyzed in the SAR. At this power level, the maximum power density is approximately 14 kW per element.
Analysis of the Fuelllandling Accident In the SAR some very conservative assumptions wem made in analyzing the fuel handling accident.
- 1. The PSBR weekly operating history was assumed to be 98 hr shutdown and 70 hr of 1 MW operation.
- 2. Immediately after the operation the element operating at the highest power density and the highest temperature (since temperature is dependent on the heat flow resistance, i. e. fuel cladding gap size, as well as the power density) is mechanically ruptured in a handling accident, j
9502130250 950206 An 14ual opportonsty On er ty PDR ADOCK 05000005 - I.0 P PDR
, Nuclear Regulatory Commission l Page 2 l February 6,1995 l I
3, The rupture' occurs in air.
- 4. There is no platcout of fission products.
- 5. No credit is taken for filtration by the emergency exhaust system.
- 6. The release fraction equation (PSBR SAR chapter 9, equation 41)is assumed to be correct even though the expenmental evidence indicates that it is high by a factor of 4 (The U-Zrlix l Alloy: Its Pronerties and use in TRIG A Fuel , M. T. Simnad, General Atomics Project No. '
4314, February 1980). ,
1 The use of assumption I rather than a more realistic (but still much more intensive than the i operation to date) daily operating history of 16 hr of shutdown followed by 8 hr of full power j operation results in consequences that are more conservative by a factor of 1.4. l The combination of the assumptions 2,3,4, and 5 "... bad to computed doses principally resulting from iodines that may be at least a factor of 100 higher than in more realistic scenarios, for example, those in which the cladding fails while the element is immersed in pool water" (Safety Evaluation Renort related to the renewal of the onerating license for the Research Reactor at Pennsylvania State University, NUREG-1158, USNRC, January 1986).
The net effect of the overly conservative assumptions (i. e. assumptions 1-6) is consequences that are higher by a factor of 500. Even so the consequences are less than the 10 CFR 20 limit for an ,
unrestricted area by a factor of 30. 1 Action Plan Ourintennediate action will be to relax the power restriction to 750 kW which allows a maximum power density of approximately 18.3 kW per element. It was determined that at this power level, the fuel handling accident consequences will still be within those of the SAR. This can be done j while maintaining all of the above overly conservative assumptions except for assumption I which l will be changed to a more realistic daily operating history of 16 hr of shutdown followed by 8 hr of I full power operation. This operational schedule as well as the 750 kW power restriction will be maintained with administrative controls.
Our next action will be to change the S AR to allow variations in core loading to reduce the maximum power density and fuel temperature. With those changes the staff can justify return to full power operation. This action will be delayed until further analysis can be done to support the change.
If you have questions on this matter, please refer them directly to Marcus 11. Voth or l Daniel E. Hughes at (814) 865-6351.
l S accrely, I i
) . 1 Davi A. Shirley Senior Vice President for Research and Graduate Education DAS/ld14009.95 pc: Region 1 Administrator