Letter Sequence RAI |
|---|
|
|
MONTHYEARML1001415002010-01-14014 January 2010
Acceptance Review Email, License Amendment Request, Revise Technical Specification 3.3.2, Engineered Safety Feature Actuation System (ESFAS) Instrumentation, for Extension of Completion Times
Project stage: Acceptance Review
ULNRC-05694, Application for Amendment to Facility Operating License NPF-30 Completion Time Extensions for TS 3.3.2 Engineered Safety Feature Actuation System (ESFAS) Instrumentation Functions TAC ME2822 (LDCN 09-0039)2010-04-22022 April 2010
Application for Amendment to Facility Operating License NPF-30 Completion Time Extensions for TS 3.3.2 Engineered Safety Feature Actuation System (ESFAS) Instrumentation Functions TAC ME2822 (LDCN 09-0039)
Project stage: Request
ML1011301132010-04-23023 April 2010
Email, Request for Additional Information, License Amendment Request, Revise Technical Specification 3.3.2, Engineered Safety Feature Actuation System (ESFAS) Instrumentation, for Extension of Completion Times
Project stage: RAI
ULNRC-05704, Application for Amendment to Facility Operating License NPF-30 Completion Time Extension for TS 3.3.2 Engineered Safety Feature Actuation System (ESFAS) Instrumentation Functions2010-05-14014 May 2010
Application for Amendment to Facility Operating License NPF-30 Completion Time Extension for TS 3.3.2 Engineered Safety Feature Actuation System (ESFAS) Instrumentation Functions
Project stage: Request
ULNRC-05724, Application for Amendment to Facility Operating License NPF-30 Completion Time Extensions for TS 3.3.2 Engineered Safety Feature Actuation System Instrumentation Functions (LDCN 09-0039 Supplement)2010-08-24024 August 2010
Application for Amendment to Facility Operating License NPF-30 Completion Time Extensions for TS 3.3.2 Engineered Safety Feature Actuation System Instrumentation Functions (LDCN 09-0039 Supplement)
Project stage: Supplement
ML1025102752010-09-0707 September 2010
Request for Additional Information, Round 2, License Amendment Request, Revise Technical Specification 3.3.2, Engineered Safety Feature Actuation System Instrumentation, for Extension of Completion Times
Project stage: RAI
ML1025102702010-09-0707 September 2010
Email Request for Additional Information, Round 2, License Amendment Request, Revise Technical Specification 3.3.2, Engineered Safety Feature Actuation System Instrumentation, for Extension of Completion Times
Project stage: RAI
ULNRC-05731, Completion Time Extensions for TS 3.3.2 Engineered Safety Feature Actuation System (ESFAS) Instrumentation Functions (LDCN 09-0039 Supplement)2010-09-29029 September 2010
Completion Time Extensions for TS 3.3.2 Engineered Safety Feature Actuation System (ESFAS) Instrumentation Functions (LDCN 09-0039 Supplement)
Project stage: Supplement
ML1029306742010-10-20020 October 2010
Request for Additional Information, Round 3, License Amendment Request, Revise Technical Specification 3.3.2, Engineered Safety Feature Actuation System (ESFAS) Instrumentation, for Extension of Completion Times
Project stage: RAI
ML1029306712010-10-20020 October 2010
Email, Request for Additional Information, Round 3, License Amendment Request, Revise Technical Specification 3.3.2, Engineered Safety Feature Actuation System (ESFAS) Instrumentation, for Extension of Completion Times
Project stage: RAI
ML1029803692010-10-25025 October 2010
Request for Additional Information, Round 4, License Amendment Request, Revise Technical Specification 3.3.2, Engineered Safety Feature Actuation System (ESFAS) Instrumentation, for Extension of Completion Times
Project stage: RAI
ML1029803312010-10-25025 October 2010
Email, Request for Additional Information, Round 4, License Amendment Request, Revise Technical Specification 3.3.2, Engineered Safety Feature Actuation System (ESFAS) Instrumentation, for Extension of Completion Times (ME2822)
Project stage: RAI
ULNRC-05738, Application for Amendment to Facility Operating License NPF-30 Completion Time Extensions for TS3.3.2 Engineered Safety Feature Actuation System (ESFAS) Instrumentation Functions (LDCN 09-0039)2010-11-0404 November 2010
Application for Amendment to Facility Operating License NPF-30 Completion Time Extensions for TS3.3.2 Engineered Safety Feature Actuation System (ESFAS) Instrumentation Functions (LDCN 09-0039)
Project stage: Request
ML1030202792010-11-0505 November 2010
Notice of Meeting with Union Electric Company to Discuss Licensees Planned Responses to Staff Requests for Additional Information Related to Callaway Plants Request to Revise TS 3.3.2, ESFAS Instrumentation Functions
Project stage: RAI
ML1034701472010-12-16016 December 2010
Summary of Meeting with Union Electric Company to Discuss Licensees Planned Responses to Staff Requests for Additional Information Related to Callaway Plants Request to Revise TS 3.3.2, ESFAS Instrumentation Functions
Project stage: RAI
ML1035103132010-12-16016 December 2010
Draft TS Mark-up Provided by Licensee as Clarification of Mutual Understanding Following NRC-Licensee TS Modification Discussions at 11/18/10 Public Mtg Re CT Extensions for TS 3.3.2 License Amendment Request
Project stage: Draft Request
ML1035102982010-12-16016 December 2010
E-mail, Draft TS Mark-up Provided by Licensee as Clarification of Mutual Understanding Following NRC-Licensee TS Modification Discussions at 11/18/10 Public Mtg Re CT Extensions for TS 3.3.2 License Amendment Request
Project stage: Draft Request
ML1101204702011-01-12012 January 2011
Notice of Meeting with Union Electric Company to Discuss Licensees Planned Responses to Staff Requests for Additional Information Callaway Plants Request to Revise TS 3.3.2, ESFAS Instrumentation Functions
Project stage: RAI
ML1104001662011-02-22022 February 2011
Summary of Meeting with Union Electric Company to Discuss Licensees Planned Responses to Staff Requests for Additional Information Callaway Plants Request to Revise TS 3.3.2, ESFAS Instrumentation Functions
Project stage: RAI
ULNRC-05737, Completion Time Extensions for TS 3.3.2 Engineered Safety Feature Actuation System (ESFAS) Instrumentation Functions, TAC No. ME2822 (LDCN 09-0039 Supplement)2011-02-23023 February 2011
Completion Time Extensions for TS 3.3.2 Engineered Safety Feature Actuation System (ESFAS) Instrumentation Functions, TAC No. ME2822 (LDCN 09-0039 Supplement)
Project stage: Supplement
ML1105405852011-02-23023 February 2011
Annual Reporting Form for Drug and Alcohol Tests, for Period Ending 2010
Project stage: Request
ML1116805362011-07-28028 July 2011
License Amendment, Issuance of Amendment No. 201, Revise Technical Specification 3.3.2, Engineered Safety Feature Actuation System (ESFAS) Instrumentation, for Extension of Completion Times
Project stage: Approval
2010-04-23
[Table View] |
Text
REQUEST FOR ADDITIONAL INFORMATION CALLAWAY PLANT, UNION ELECTRIC COMPANY, LICENSE AMENDMENT SUPPLEMENT (LCDN 09-0039) FOR COMPLETION TIME EXTENSIONS FOR TS 3.3.2, ENGINEERED SAFETY FEATURE ACTUATION SYSTEM (ESFAS) INSTRUMENTATION FUNCTIONS TAC Number ME2822 The NRC staff requests additional information to complete its review of the license amendment request for revision of Technical Specification (TS) 3.3.2, Engineered Safety Feature System (ESFAS)
Instrumentation Function 6.g., Trip of all Main Feedwater Pumps and Action Statement J, for the Condition of One or more main Feedwater Pumps trip channel(s) inoperable.
By [[letter::ULNRC-05665, Application for Amendment to Facility Operating License NPF-30 (LDCN 09-0039) Completion Time Extensions for TS 3.3.2 Engineered Safety Feature Actuation System (ESFAS) Instrumentation Functions|letter dated November 25, 2009]], Union Electric Company (licensee) proposed TS change to permit a 24-hour Completion Time (CT) for placing a single Main Feedwater (MFW) Pump separation group channel in trip. During this 24-hour period, with only one channel inoperable and prior to placing its separation group channel in a trip condition, the logic would still maintain the safety function of starting the Auxiliary Feedwater (AFW) Pumps if the unit experienced the loss of both Main Feedwater (MFW) Pumps due to the remaining separation group channels still being operable during that 24-hour period.
Subsequent to the November 25, 2009 amendment request, the NRC staff issued exigent amendment (ML101100665, ME3595 dated May 5, 2010) which permits placing multiple (one or more) inoperable MFW Pump separation group channels in trip for the existing 1-hour CT period, even if a loss of safety function condition exists. This loss of safety function can exist for either of two reasons: (1) separate condition entries are allowed for each MFW Pump trip function (as per an initial note in TS 3.3.2); or, (2) a subsequent trip of the running MFW pump during the 1-hour CT prior to the affected,Reset MFW pump, requiring LCO entry, having its separation group channels placed in trip. In its review of the exigent amendment, the NRC staff recognized that if a certain combination of channels were inoperable, then the loss of safety function condition would exist.
Based on the limited time of 1-hour, the regulatory consistency of TS actions required following loss of important equipment, and the significance of the safety function, the NRC staff approved the 1-hour CT.
The August 24, 2010 supplemental submittal, which incorporates the initial amendment with the exigent amendment changes, proposes that the Condition J. CT be increased to 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. This change would permit unavailability of the specified safety function of starting the AFW Pumps on loss of all MFW Pumps for the same two reasons as stated above, but now for a 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> CT.
Based on the above NRC staff review, the NRC staff has following three additional questions:
(a) What additional justification can be provided to clarify the industrys regulatory consistency by increasing the unavailability for the TS safety function from 1 to 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />?
(b) The NRC staff noted that the 24-hour CT may be used for operational and/or maintenance convenience, while the controls of a MFW Pump are in Reset. Since the stated intent for exigent amendment request discussed MFW pump operations during plant start-up and shutdown with one MFW pump in Reset, the increased CT would expose the plant to a
potential loss of the AFW actuation safety function for up to 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> should the separation group channels for the Reset MFW Pump not be placed in a trip condition and the running MFW Pump fail. What additional justification can you provide to justify the operational intent in employment of the proposed Condition J?
(c) The original November 2009 license amendment request was noticed to the public in the Federal Register on April 29, 2010. The August 2010 supplemental submittal expanded the scope of the original license amendment request by extending the loss of safety function duration from 1 to 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, but a No Significant Hazards Determination was not provided to address this change. Please describe what changes are needed to the No Significant Hazards Determination in order to complete the supplemental submittal.
