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Category:CORRESPONDENCE-LETTERS
MONTHYEARML20217N7591999-10-18018 October 1999 Provides Monthly Update on Progress of Installation of Seismic Upgrade Mods to Bldgs C-331 & C-335 ML20217M3861999-10-15015 October 1999 Provides Addl Changes to SAR Update Certificate Amend Request,Containing Changes That Resulted from re-evaluation of Autoclave head-to-shell O-ring Leakage Analysis Provided by DOE SAR Repts ML20217G1811999-10-14014 October 1999 Forwards Reissued Amend to Coc for Usec Paducah Gdp.Coc Corrects Coc Issued on 991006.Amend Number & Effective Date Were Inadvertently Incorporated as 3 & 991026,instead of 4 & 991105 ML20217G1731999-10-14014 October 1999 Requests Addl Info Re Applications Dtd 990924,requesting Amends to Cocs for Paducah & Portsmouth GDPs for Revised QA Programs.Encl Identifies Specific Info Needed.Info Should Be Provided within 30 Days ML20217F6801999-10-12012 October 1999 Forwards Updated Paducah GDP Certificate Amend Requests at NRC for Approval ML20217B3521999-10-0606 October 1999 Forwards Amend 3 to Certificate of Compliance GDP-1 to Revise Six Technical Safety Requirements Sections.Sections Are 2.1.4.17,2.1.4.8,2.3.4.1,2.3.4.4,2.3.4.16 & 3.10.4.b. Compliance Evaluation Rept Also Encl ML20217B2801999-10-0606 October 1999 Forwards Insp Rept 70-7001/99-203 on 990921-23.No Violations Noted ML20212K8941999-10-0404 October 1999 Forwards Insp Rept 70-7001/99-10 on 990720-0907 & Forwards NOV Indicating That Some Personnel Were Incorrectly Granted Unescorted Access to Controlled Access Areas Without Having Necessary Specific Training ML20216J8931999-10-0101 October 1999 Forwards Copy of Security Incident Log & Associated Info for Sept 1999 ML20216J9081999-09-30030 September 1999 Forwards Revised Written Event Rept 99-10,rev 3,pertaining to Corroded Fire Sprinkler Heads Affecting Operability of high-pressure Fire Water (HPFW) Sprinkler Sys.No Commitment Contained in Rept ML20217M3701999-09-29029 September 1999 Submits bi-monthly Update on Progress of Mods to Upgrade Audibility of Criticality Accident Alarm Sys (Caas).Schedule for CAAS Audibility Upgrades Attached ML20212H1251999-09-24024 September 1999 Notifies NRC of Change in Regulatory Commitments Associated with Submittal Date for Update of Application SAR Chapter 3.Specifics of Commitment Changes of Listed ML20212H3801999-09-24024 September 1999 Responds to 990723 RAI Re 1999 Annual Update to Certification Applications ML20212H3721999-09-22022 September 1999 Forwards NRC Form 790 Classification Record Documents for Paducah & Portsmouth GDPs That Were Generated During Month of Aug 1999.Without Encl ML20212F0981999-09-22022 September 1999 Forwards Insp Rept 70-7001/99-12 on 990830-0902.Purpose of Insp Was to Determine If Security Requirements Adequately Implemented & Included Review of Approved Plant Security Plan.No Violations Identified ML20217J1211999-09-20020 September 1999 Submits Listed Comments on NRC Proposed Rule, Reporting Requirements for Nuclear Power Reactors ML20212D4291999-09-17017 September 1999 Forwards Required 30-day Written Event Rept Re Criticality Accident Alarm Sys Response Time in Bldg C-710.Encl 2 Contains Commitments Contained in Submittal ML20212D4231999-09-16016 September 1999 Informs That Review of Event Rept Er 99-12 Revealed Listed Two Statements Inadvertently Omitted from Document ML20212D2361999-09-15015 September 1999 Submits Monthly Update on Progress of Installation of Seismic Upgrade Mods to Bldgs C-331 & C-335 ML20212B6611999-09-15015 September 1999 Forwards Insp Rept 70-7001/99-202 on 990816-20.No Violations Noted ML20212A5441999-09-14014 September 1999 Ack Receipt of Informing NRC of Steps Taken to Correct Violations Noted in Insp Rept 70-7001/99-07 ML20212A5531999-09-14014 September 1999 Ack Receipt of Informing NRC of Steps Taken to Correct Violations Noted in Insp Rept 70-7001/99-08 ML20211Q9951999-09-10010 September 1999 Forwards 30-day Written Rept ER-99-12,re Loss of Power to Autoclave Position 1 North & 1 South Process Gas Leak Detection (Pgld) in Bldg C-333-A.Caused by Electrical Short Circuit.Submitted Work Request 501636 for PI SEX-4 ML20216E4891999-09-0909 September 1999 Responds to Violations Noted in Insp Rept 70-7001/99-08. Corrective Actions:On 990602 Responsible Organization Manager Met with FP Engineer Performing Bldg Reappraisal & Made Clear Expectation for Prompt Reporting of Deficiencies ML20211P2091999-09-0909 September 1999 Provides Staff Written Clarification of NRC Reporting Expectations of When Double Contingency Losses Should Be Reported to NRC IAW Bulletin 91-001, Reporting Loss of Criticality Safety Controls, & Suppl ML20211P3831999-09-0303 September 1999 Forwards Coc GDP-1,amend 3 & Coc GDP-2,amend 4 for Paducah (Pgdp) & Portsmouth (Ports) Gdps,Respectively by Revising Pgdp & Ports QAPs in Vol 3 of Respective Certificate Applications ML20211L6441999-09-0202 September 1999 Forwards Insp Rept 70-7001/99-11 on 990802-06.No Violations Noted.Insp Consisted of Selective Exam of Procedures & Representative Records,Interviews with Personnel & Observations of Activities in Progress ML20211M3551999-09-0101 September 1999 Forwards Copy of Security Incident Log & Associated Info for Month of Aug 1999,IAW 10CFR95.57(b) ML20211K4041999-08-31031 August 1999 Forwards Responses to Remaining NRC Questions/Comments from 980601 & 0709 NRC RAIs Re SAR Update ML20211M7031999-08-30030 August 1999 Forwards Proprietary Rev 0 to Arming & Arrest Authority Security Plan for Paducah & Portsmouth Gaseous Diffusion Plants, for Review & Approval.Encl Withheld ML20211G9971999-08-26026 August 1999 Forwards Rev 2 to Written Rept Er 99-10,re Corroded Fire Sprinkler Sys in Bldg C-337 & C-333.Analysis of Root Cause Has Not Been Completed.Statistically Based Sprinkler head- Sampling Plan Has Been Completed & Approved ML20211B5021999-08-20020 August 1999 Forwards Amend 2 to Certificate of Compliances GDP-1, Revising Paducah GDP Technical Safety Requirements Re Audibility Requirements for Criticality Accident Alarm Sys at Facility & Related Sections of SAR ML20211F1761999-08-20020 August 1999 Requests That Paducah GDP facility,C-709 Lab Annex Bldg Be Added to List of Facilities to Be Exempted from CAAS Detection Coverage ML20211D9751999-08-20020 August 1999 Forwards Rev 1 to Final Written Event Rept Er 99-11,re Unplanned Actuation of C-333-A Autoclave 1 North Autoclave Steam Pressure Control Sys (Aspcs) on 990623 ML20211A7011999-08-17017 August 1999 Forwards Copy of Final Amend to 10CFR76 for Info of Subcommittee.Final Rule Is Being Transmitted to Fr for Publication.Final Rule Will Amend Regulations That Apply to Paducah & Portsmouth Gaseous Diffusion Plants ML20211D5811999-08-16016 August 1999 Submits Monthly Update on Progress of Installation of Seismic Upgrade Mods to Bldgs C-331 & C-335 ML20210P7421999-08-10010 August 1999 Forwards Insp Rept 70-7001/99-08 on 990529-0719 & Nov. Violations of Concern Because Late Reporting of Problems with safety-related Equipment Could Negatively Impact Continued Availability of Equipment ML20210Q6061999-08-0909 August 1999 Forwards NRC Form 790 Classification Record Documents for Paducah & Portsmouth Gdps,Per 10CFR95.57.Records Were Generated During Month of July 1999.Without Encl ML20210L6571999-08-0404 August 1999 Informs That Staff Completed Initial Review of 990720 Application to Amend Coc GDP-1.Staff Anticipates Completing Review by 990930 ML20211A7901999-08-0404 August 1999 Forwards Info Requested During Briefing by NRC Staff on 990726 Re NRC Interactions with Usec ML20210H3161999-07-30030 July 1999 Forwards Rev 1 to Written Event Rept ER-99-10,re Corroded Fire Sprinkler Heads Affecting Operability of HP Fire Water Sprinkler Sys in Bldg C-337 & C-333.Testing & Analysis of Root Cause & Corrective Actions Necessary Are Not Complete ML20210J1331999-07-30030 July 1999 Forwards Copy of Security Incident Log & Associated Info for Month of July 1999,per Reporting Requirements of 10CFR95.57(b) ML20210H2181999-07-29029 July 1999 Responds to Violations Noted in Insp Rept 70-7001/99-07. Corrective Actions:Smoke Watch Was Established Covering Area Affected by Process Gas Leak Detection Inoperabilty & Individuals Involved Were Counseled for Personnel Errors ML20210P7871999-07-29029 July 1999 Provides bi-monthly Update on Progress of Modifications to Upgrade Audibility of Criticality Accident Alarm Sys,In Response to NRC 981217 Request ML20210F9761999-07-28028 July 1999 Forwards Compliance Evaluation Rept Prepared to Support Amend of Coc GDP-1 Re Criticality Accident Alarm Sys Audibility.Notice of Amend Forwarded to Ofc of Fr Also Encl ML20210J7921999-07-27027 July 1999 Forwards Proprietary NRC Form 327, Special Nuclear Matl (SNM) & Source Matl (SM) Physical Inventory Summary Rept, for Paducah & Portsmouth Gdps.Rept Covers Period Ending 990528.Proprietary Info Withheld,Per 10CFR2.790(d) ML20210G0391999-07-26026 July 1999 Forwards Compliance Evaluation Rept & Fr Notice for Revised Qaps,Per 990212 Application ML20210H6001999-07-26026 July 1999 Forwards NRC Form 790 Classification Record Documents for Paducah & Portsmouth Gaseous Diffusion Plants That Were Generated During Month of June 1999.Without Encl ML20210D8181999-07-23023 July 1999 Submits Response to SA Toelle Ltr Dtd 990614, 10CFR76.68(a)(3) Decreased Effectiveness Reviews & RAI for Paducah & Portsmouth Transmittals of 1999 Annual Update to Certification Applications ML20210E4291999-07-23023 July 1999 Forwards Required 30-day Written Event Rept Re Unplanned Actuation of C-333-A Autoclave 1 North Autoclave Steam Pressure Control Sys (Aspcs) on 990623.Investigation Ongoing for Root Cause 1999-09-09
[Table view] Category:INCOMING CORRESPONDENCE
MONTHYEARML20217N7591999-10-18018 October 1999 Provides Monthly Update on Progress of Installation of Seismic Upgrade Mods to Bldgs C-331 & C-335 ML20217M3861999-10-15015 October 1999 Provides Addl Changes to SAR Update Certificate Amend Request,Containing Changes That Resulted from re-evaluation of Autoclave head-to-shell O-ring Leakage Analysis Provided by DOE SAR Repts ML20217F6801999-10-12012 October 1999 Forwards Updated Paducah GDP Certificate Amend Requests at NRC for Approval ML20216J8931999-10-0101 October 1999 Forwards Copy of Security Incident Log & Associated Info for Sept 1999 ML20216J9081999-09-30030 September 1999 Forwards Revised Written Event Rept 99-10,rev 3,pertaining to Corroded Fire Sprinkler Heads Affecting Operability of high-pressure Fire Water (HPFW) Sprinkler Sys.No Commitment Contained in Rept ML20217M3701999-09-29029 September 1999 Submits bi-monthly Update on Progress of Mods to Upgrade Audibility of Criticality Accident Alarm Sys (Caas).Schedule for CAAS Audibility Upgrades Attached ML20212H3801999-09-24024 September 1999 Responds to 990723 RAI Re 1999 Annual Update to Certification Applications ML20212H1251999-09-24024 September 1999 Notifies NRC of Change in Regulatory Commitments Associated with Submittal Date for Update of Application SAR Chapter 3.Specifics of Commitment Changes of Listed ML20212H3721999-09-22022 September 1999 Forwards NRC Form 790 Classification Record Documents for Paducah & Portsmouth GDPs That Were Generated During Month of Aug 1999.Without Encl ML20217J1211999-09-20020 September 1999 Submits Listed Comments on NRC Proposed Rule, Reporting Requirements for Nuclear Power Reactors ML20212D4291999-09-17017 September 1999 Forwards Required 30-day Written Event Rept Re Criticality Accident Alarm Sys Response Time in Bldg C-710.Encl 2 Contains Commitments Contained in Submittal ML20212D4231999-09-16016 September 1999 Informs That Review of Event Rept Er 99-12 Revealed Listed Two Statements Inadvertently Omitted from Document ML20212D2361999-09-15015 September 1999 Submits Monthly Update on Progress of Installation of Seismic Upgrade Mods to Bldgs C-331 & C-335 ML20211Q9951999-09-10010 September 1999 Forwards 30-day Written Rept ER-99-12,re Loss of Power to Autoclave Position 1 North & 1 South Process Gas Leak Detection (Pgld) in Bldg C-333-A.Caused by Electrical Short Circuit.Submitted Work Request 501636 for PI SEX-4 ML20216E4891999-09-0909 September 1999 Responds to Violations Noted in Insp Rept 70-7001/99-08. Corrective Actions:On 990602 Responsible Organization Manager Met with FP Engineer Performing Bldg Reappraisal & Made Clear Expectation for Prompt Reporting of Deficiencies ML20211M3551999-09-0101 September 1999 Forwards Copy of Security Incident Log & Associated Info for Month of Aug 1999,IAW 10CFR95.57(b) ML20211K4041999-08-31031 August 1999 Forwards Responses to Remaining NRC Questions/Comments from 980601 & 0709 NRC RAIs Re SAR Update ML20211G9971999-08-26026 August 1999 Forwards Rev 2 to Written Rept Er 99-10,re Corroded Fire Sprinkler Sys in Bldg C-337 & C-333.Analysis of Root Cause Has Not Been Completed.Statistically Based Sprinkler head- Sampling Plan Has Been Completed & Approved ML20211D9751999-08-20020 August 1999 Forwards Rev 1 to Final Written Event Rept Er 99-11,re Unplanned Actuation of C-333-A Autoclave 1 North Autoclave Steam Pressure Control Sys (Aspcs) on 990623 ML20211F1761999-08-20020 August 1999 Requests That Paducah GDP facility,C-709 Lab Annex Bldg Be Added to List of Facilities to Be Exempted from CAAS Detection Coverage ML20211D5811999-08-16016 August 1999 Submits Monthly Update on Progress of Installation of Seismic Upgrade Mods to Bldgs C-331 & C-335 ML20210Q6061999-08-0909 August 1999 Forwards NRC Form 790 Classification Record Documents for Paducah & Portsmouth Gdps,Per 10CFR95.57.Records Were Generated During Month of July 1999.Without Encl ML20210J1331999-07-30030 July 1999 Forwards Copy of Security Incident Log & Associated Info for Month of July 1999,per Reporting Requirements of 10CFR95.57(b) ML20210H3161999-07-30030 July 1999 Forwards Rev 1 to Written Event Rept ER-99-10,re Corroded Fire Sprinkler Heads Affecting Operability of HP Fire Water Sprinkler Sys in Bldg C-337 & C-333.Testing & Analysis of Root Cause & Corrective Actions Necessary Are Not Complete ML20210P7871999-07-29029 July 1999 Provides bi-monthly Update on Progress of Modifications to Upgrade Audibility of Criticality Accident Alarm Sys,In Response to NRC 981217 Request ML20210H2181999-07-29029 July 1999 Responds to Violations Noted in Insp Rept 70-7001/99-07. Corrective Actions:Smoke Watch Was Established Covering Area Affected by Process Gas Leak Detection Inoperabilty & Individuals Involved Were Counseled for Personnel Errors ML20210J7921999-07-27027 July 1999 Forwards Proprietary NRC Form 327, Special Nuclear Matl (SNM) & Source Matl (SM) Physical Inventory Summary Rept, for Paducah & Portsmouth Gdps.Rept Covers Period Ending 990528.Proprietary Info Withheld,Per 10CFR2.790(d) ML20210H6001999-07-26026 July 1999 Forwards NRC Form 790 Classification Record Documents for Paducah & Portsmouth Gaseous Diffusion Plants That Were Generated During Month of June 1999.Without Encl ML20210E4291999-07-23023 July 1999 Forwards Required 30-day Written Event Rept Re Unplanned Actuation of C-333-A Autoclave 1 North Autoclave Steam Pressure Control Sys (Aspcs) on 990623.Investigation Ongoing for Root Cause ML20210C5411999-07-16016 July 1999 Forwards Addl Changes to SAR Update (Sarup) Car,Comprising of Second Set of Sarup Technical Safety Requirement (Tsr) Changes & Associated Changes to Sarup Text Discussed in ML20210C1181999-07-15015 July 1999 Forwards Monthly Update on Progress of Installation of Seismic Upgrade Mods to Bldg C-331 & C-335 ML20210B9701999-07-15015 July 1999 Forwards Proprietary & non-proprietary Info Re Implementation Status of Compliance Plan.Info Covers Period of 990102-0630.Proprietary Info Withheld,Per 10CFR2.790 ML20210B2061999-07-15015 July 1999 Forwards Original Standby Trust Agreement Ack Form.Facsimile of Ack Form Was Submitted in for Usec ML20209G5831999-07-0909 July 1999 Forwards Required 30-day Written Event Rept ER-99-09 Re Loss of Power to Criticality Accident Alarm Sys in Bldgs C-409 & C-720-M.Commitments Made by Licensee Are Identified in Encl 2 ML20209C1041999-07-0202 July 1999 Forwards 30-day Event Rept ER-99-10,re Corroded Fire Sprinkler Heads Affecting Operability of High Pressure Fire Wsater Sprinkler Sys in Bldg C-337 & Bldg C-333.Test to Determine Cause & C/As Necessary Have Not Been Completed ML20209B4541999-07-0101 July 1999 Responds to GL 98-03, NMSS Licensees & Certificate Holders Y2K Readiness Programs, Under Oath & Affirmation for Paducah & Portsmouth GDPs ML20209C1151999-07-0101 July 1999 Forwards Copy of Security Incident Log & Associated Info for Month of June 1999,per Reporting Requirements of 10CFR95-57(b) ML20209D3301999-07-0101 July 1999 Forwards Addl Changes to SAR Update Certificate Amend Request Submitted on 971031,comprising First Set of Technical Safety Requirement Changes & Associated Changes to Text,Which Was Discussed in to NRC ML20209D3511999-07-0101 July 1999 Notifies of Change to Regulatory Commitment Re Mods to C-310 & C-315 Normetex Pump High Discharge Pressure Shutdown Sys, Which Was Made in Response Associated with Table 1,Item 13 of SAR Update Certificate Amend Request ML20209E7141999-07-0101 July 1999 Forwards Security Incident Log & Associated Info for Month of June 1999,per 10CFR95.57(b) ML20209B5531999-06-25025 June 1999 Provides Response to NRC RAI Re Commitment Made During 990624 Conference Call Concerning Request for Enforcement Discretion to Allow Continued Plant Operations Beyond Existing Schedule Date for Issue 36 Noted in DOE/OR-2026 ML20209B5601999-06-25025 June 1999 Forwards Discussion of SAR Changes Made to Address NRC Corrections & Clarifications & Changes Identified by Usec. Revised SAR Pages Encl ML20209D0721999-06-25025 June 1999 Informs That Licensee Intends to Maintain Compliance Plan Issue 2 in Open Status Until NRC Approves Update to Application SAR ML20196E0221999-06-17017 June 1999 Notifies NRC of Change in Regulatory Commitments.Commitments Being Changed Were Made in Usec Ltrs GDP 97-0188 & 97-0189. Specific Changes Are Listed Below ML20196F0151999-06-17017 June 1999 Forwards NRC Form 790,classification Record Documents for Paducah & Portsmouth Gaseous Diffusion Plants That Were Generated During Month of May 1999.Without Encl ML20196A7431999-06-16016 June 1999 Requests Enforcement Discretion to Allow Continued Plant Operations Beyond Existing Schedule Date for Completing Plan of Action & Schedule for Issue 36 Described in DOE/ORO-2026 ML20196A9271999-06-15015 June 1999 Provides Monthly Update on Progress of Installation of Seismic Upgrade Mods to Bldgs C-331 & C-335 ML20196A7311999-06-14014 June 1999 Requests NRC Interpretation to Confirm That Licensee Current Practice of Performing USQ Determination Review to Accomplish Decreased Effectiveness Review of Changes to Safety Programs in SAR Meets Requirements ML20195E9411999-06-0808 June 1999 Provides Results of Initiative to Determine If Further Application of Industry Codes & Stds at Gaseous Diffusion Plants Is Warranted ML20195D5651999-06-0101 June 1999 Provides bi-monthly Update on Progress of Modifications to Upgrade Audibility of CAAS 1999-09-09
[Table view] |
Text
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dy USEC A Global Energy C September 30,1999 :
L GDP 99-1036 i
United States Nuclear Regulatory Commission
' Attention:. Document Control Desk.
Washington, D.C. 20555-0001
,i Paducah Gaseous Diffusion Plant (PGDP).
Docket No. 70-7001 Event Report ER-99-10, Rev. 3 l
- Pursuant to 10CFR76.120(d)(2), enclosed is the revised written event report pertaining to corroded fire sprinkler heads affecting the operability of high-pressure fire water (HPFW) sprinkler systems.
The Nuclear Regulatory Commission (NRC) was notified of the initial event on June 3,1999 (NRC No. 35790)'and updated, as other notifications became necessary. At this time, the testing and analysis to determine the root cause and corrective actions necessary have not been completed.
Vertical bars in the right hand margin indicate changes to the last repor dated August 26,1999.
There are no commitments contained in this report.
Any questions regarding this matter should be directed to Larry Jackson at (502) 441-6796.
Sincerely, AI\\
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loward ley /
j General Manaper - -
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Paducah Gaseous Diffusion Plant
Enclosures:
As Stated :
cc: NRC Region III OfTice NRC Resident Inspector - PGDP i
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9910060331 990930 POR ADOCK 07007001 C
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P.O. Box 1410, Paducah, KY 42001 Telephone.502-441-5803 Fax 502 441-5801 http://www.us.:c. corn i
L Offices in Livermore, CA 1%ducah, KY Portsmouth, OH Washington, DC L -.
p Docket No. 70-700t GDP 99-1036 Page 1 of 4 EVENT REPORT ER-99-10, Rev. 3 l
DESCRIPTION OF EVENT On June 2,1999, at approximately 1630 hrs., Fires Services personnel notitled the Plant Superintendent (PSS) that during the annual Fire Services building high pressure fire wat (HPFW) sprinkler system re-appraisal,66 sprinkler heads in the C-337 process b 16 systems and 20 sprinkler heads in the C-333 process building affecting 1 system were have a build up ofsorrosion products around the body of the heads. The PSS consulted with plants fire protection engineer who could not provide reasonable assurance that the affected sprinkler heads could perform their design function. The PSS then declared the systems i and C-333 inoperable, and established roving fire patrols in the affected areas, as re Technical Safety Requirements (TSR) General Limiting Conditions For Operations (LC 2.4.4.5.
On June 3,1999, at 1330 hrs., the Nuclear Regulatory Commission Headquarter (NRC-HQ) operations office was notified of the event, as required by 10CFR76.120(c)(2)
NRC event 35790 was assigned.
Inspections of the remaining Cascade process building sprinkler systems were initiated to determine if other systems exhibited similar prob! cms. Th resulted in the discovery of-two sprinkler heads in the C-335 process building, which had similar corrosion deposits affecting the operability of one system. This system was declared inop and LCO actions to establish a roving fire watch were implemented. At 0922 hrs., on June 4, 1999, NRC-HQ operations office was notified, as required by 10CFR76.120 (c)(2) and NRC No 35790 was updated to provide this additional information.
Subsequent to these notifications, investigation team members on June l
16, 1999, identified corrosion on eight sprinkler heads in C-333. The effected systems were declared inoperabl fire watches were implemented. NRC-HQ was notified and the event report (NRC No. 3579
{
was updated on June 17,1999.
On June 18,1999, this report was again updated and NRC-HQ notified to repon the discove
'I three sprinider heads in the C-333.
4 On June 25, 1999, the report was updated and NRC-HQ notified to report five additional sprinkler heads in C-337 with similar corrosion.
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Docket No. 70-7001 GDP 99-1036 Page 2 of 4 On July 30,~ 1999, this report 'was updated and NRC-HQ notified when five additional corroded sprinkler heads were discovered in C-337. On July 31,1999, two additional corroded sprinkler heads were discovered in C-337. NRC-HQ was notified and the report was again updated.- On
' August 10, 1999, two corroded sprinkler heads were discovered in C-337 and NRC was ' notified
~ and the report updated. On August 22,1999, four corroded ' sprinkler heads were discovered in C-333. On August 28,1999, two adjacent sprinkler heads were discovered in C-337 system D-
-11; August 29,1999, two adjacent heads were discovered in C-337 system D-15 and system D-7 10; and on September 30,1999, two adjacent sprinkler heads were discovered in C-333 in system x
iB-15. NRC-HQ was notified and this report updated. The total number of corroded heads below
- exceeds the numbefs stated above, because operability of the system may not depend on a single T head. l-A specific operability determination is conducted when a' corroded head is found and includes the number of corroded heads and location.
. For all of the above discoveries, the systems were declared inoperable, LCO actions initiated and actions were immediately initiated to replace the sprinkler heads affecting system ' operability and following completion of this work, the systems were declared operable and LCO actions were
- exited.
The HPFW sprinkler systems in the process buildings are wet-pipe systems installed in the 1954 timeframe. The total number of sprinkler heads with external' mineral deposits discovered to date in 1999 is 133. The breakdown by building is: (number of corroded heads / total heads) C-310
=.0/606; C-315 = 0/92; C-331 = 0/12,610; C-333 = 47/24,877; C-337== 118/24,7%; C-335
= 2/13,368.
~ The replacement of sprinkler heads with corrosion deposits, which may affect the HPFW systems operability, provides reasonable assurance that the system can perform its intended function.
' CAUSE OF EVENT -
Although thS analysis to determine the root cause of the event has not been completed,
. preliminary results indicate that the deposits discovered on the sprinkler heads are the results of water leakage and ' subsequent evaporation.. The' deposits appear to be salts associated with typical constituents of the sprinkler system water chemistry, e.g., calcium, chloride, and sodium. It appears that the leakage is caused by corrosion of the interior copper gasket,' which is designed to provide a' seal between the body of the sprinkler heaaand the sprinkler " cap" or " button" (see attached diagram). The analysis to determine the cause of the button deterioration and the effect of the resulting deposits on the heads operability has not been completed. The USEC plant at Portsmouth,. Ohio is. involved in the investigation and the issue has been discussed with a representative of the Factory Mutual (FM) Insurance Company and Grinnell Corporation.
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Docket No. 70-7001 1 -
GDP 99-1036 Page 3 of 4 1
j L In addition to the testing ongoing at Paducah and Portsmouth, FM has agreed to con]
- at their laboratories to provide their expertise in this area. Several sprinkler heads have been L
removed from the HPFWS and 'sent to the FM metallurgy and hydraulics' laboratories for testin i
The.results of: FM's hydraulics test on'12 sprinkler heads submitted by PGDP have been
- receivedc; FM tested each head in their air oven sensitivity testing apparatus. Each head was screwed into the air' o'ven's water tes' t connection. The water pressure was adjusted to 5 psi and
- the air oven temperature rate-of-rise controller was then regulated to follow a temperature / time test prot 6 col to evaluate the sprinkler's operation sensitivity response. Six of the 12 sprinklers Lresponded satisfactorily, i.e. actuated at or below 212* F and expelled the cap flowing water, as.
- designed. Two o'f these sprinklers did not have visible mineral deposits. The remaining l
sprinklers, all-of which exhibited external mineral deposits, actuated at approximately 212' F, but-failed to eject their cap and gaskets at the required 5 psi water pressure. They required L
. increasing' pressure of 15 psi (2 sprinklers),' 30 psi (1 sprinkler) 55 psi (1 sprinkler) and 120 psi (2' sprinklers) to dislodge their cap'and gasket.
From these tests FM considered these 6
. sprinklers unreliable for automatic fire protection service. Three other heads were sent to FM's i
metallurgy labs for testing. The results of their metallurgy lab tests have not been received.
LA statistically based sprinkler head-sampling plan has been completed and approved. This will' provide _a method by.which sprinkler heads will be endomly chosen and removed from the spstem for analysis and' testing. This will include the removal of heads exhibiting the external mineral deposits and heads that do not. A laboratory procedure has been created to provide the,
controls for the testing bf the heads'that are removed. The results of this testing will be used to L
determine the overall effect of this problem on the HPFWS.
/In. addition, representatives from the BetziDearborn Water Management Group have visited the j'
plant and have been requested to provide tiseir expertise to assist in determining the cause of the
[
deterioration of the sprinkler heads copper gasket. They have agreed to assist in the development L
of a firewater-sampling plan and have made some recommendations. This water sampling and iy analysis will aid in determining the cause and scope of the water chemistry problem. Water -
l
! samples have been drawn from various selected fire sprinkler systems, the cooling tower basins
~
l'
' and HPFW tank and'sent to Betz for analysis. The' results of this and the sprinkler head testing effort will be used to determine the cause,.the effect, and the corrective ' actions necessary to
~
correct the problem. This report will be revised as the results of the testing and analysis becomes
' available. ~ A target'date for the next revision is November 5,1999.
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l Docket No. 70-7001 i
GDP 99-1036 Page 4 of 4
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EXTENT OF EXPOSURE OF INDIVIDUALS TO RADIATION OR TO RADIOACTIVE MATERIALS This event does not involve radioactive materials and no exposures have occurred.
l LESSONS LEARNED To'Be Determined l
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