ENS 41794: Difference between revisions
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| event date = 04/26/2005 EDT | | event date = 04/26/2005 EDT | ||
| last update date = 06/24/2005 | | last update date = 06/24/2005 | ||
| title = Part 21 Notification - Critical Power Determination | | title = Part 21 Notification - Critical Power Determination for Ge14 and Ge12 Fuel with Zircaloy Spacers | ||
| event text = The following is a portion of a facsimile received on June 24, 2005 from GE Energy, reference - MFN 05-058 Rev 1: | | event text = The following is a portion of a facsimile received on June 24, 2005 from GE Energy, reference - MFN 05-058 Rev 1: | ||
ATTACHMENT 2 - 60-Day interim Report Notification per �21.21(a)(2), and Transfer of Information per �21.21(b) | ATTACHMENT 2 - 60-Day interim Report Notification per �21.21(a)(2), and Transfer of Information per �21.21(b) | ||
Latest revision as of 22:20, 1 March 2018
ENS Event | |
|---|---|
04:00 Apr 26, 2005 | |
| Title | Part 21 Notification - Critical Power Determination for Ge14 and Ge12 Fuel with Zircaloy Spacers |
| Event Description | {{#Wiki_filter:The following is a portion of a facsimile received on June 24, 2005 from GE Energy, reference - MFN 05-058 Rev 1:
ATTACHMENT 2 - 60-Day interim Report Notification per �21.21(a)(2), and Transfer of Information per �21.21(b) (i) Name and address of the individual informing the Commission: J. S. Post, Manager, Engineering Quality &Safety Evaluations, GE Energy - Nuclear, 3901 Castle Hayne Road, Wilmington, NC 28401. (ii) Identification of the facility, the activity, or the basic component supplied for such facility or such activity within the United States, which may fail to comply or contain a defect: The affected and potentially affected plants are identified in Attachment 1. This concern is limited to plants that have fresh or once-burned GE14 or GE12 fuel with Zircaloy spacers. GE12 fuel with Inconel spacers is not affected. (iii) Identification of the firm constructing the facility or supplying the basic component, which may fail to comply or contain a defect: Global Nuclear Fuel-Americas, LLC, Wilmington, NC. (iv) Nature of the defect or failure to comply and safety hazard, which could be created by such defect or failure to comply: During review of GE14 ATLAS critical power tests results, it was discovered that springs on the Zircaloy test spacers used in the GE14 and GE12 critical power testing were deformed, possibly during the testing. This resulted in a potentially non-conservative critical power determination for fuel bundle corner pin locations. This non-conservatism potentially impacts the calculated margin to the Operating Limit Minimum Critical Power Ratio (OLMCPR), the Safety Limit MCPR (SLMCPR), the Rod Withdrawal Error (RWE) analysis, and the R-factors used in the on-line 3D core simulator. GE has completed the evaluation of the impact on the critical power determination, and has completed the evaluation of the impact on the R-factors. GE has performed a preliminary evaluation of the impact on the margin to the OLMCPR, the impact on the SLMCPR, and the impact on the RWE event. Potentially affected plants have been informed and have taken appropriate compensatory actions. (v) The date on which the information of such a potential defect or failure to comply was obtained: This concern was identified in the GE safety evaluation program on April 26, 2005. (vi) In the case of a basic component which may contain a defect or failure to comply, the number and locations of all such components in use at, supplied for, or being supplied for one or more facilities or activities subject to the regulations in this part: The basic component that may contain a defect is the critical power determination for fresh and once-burned GE14 and GE12 fuel with Zircaloy spacers. GE12 fuel with Inconel spacers and other GNF fuels are not affected. In the US, only GE14 is affected since all GE12 designs in the US have Inconel spacers. (vii) The corrective action which has been, is being, or will be taken: the name of the individual or organization responsible for the action; and the length of time that has been or will be taken to complete the action (note, these are actions specifically associated with the identified Potential Reportable Condition evaluation): GE has completed the evaluation of the impact on the critical power determination and has completed the evaluation of the impact on the R-factors. GE has performed a preliminary evaluation of the impact on the margin to the OLMCPR, the impact on the SLMCPR, and the impact on the RWE event. Plants that may have non-conservative process computer calculated OLMCPR margins have taken compensatory action as necessary based on the magnitude of the non-conservatism to prevent inadvertently exceeding the OLMCPR during plant operating maneuvers. Additional corrective actions planned are as follows: 1. Complete the current-cycle analyses to confirm the non-conservative MFLCPR impact (September 20, 2005). 2. Complete the analysis for previous cycle(s) extending to the previous three years of operation to determine which plants may have a non-conservative MFLCPR (December 15, 2005). 3. Complete the analyses to confirm that no plant has a SLMCPR impact greater than or equal to the reportable threshold of 0.01 (September 20, 2005). 4. Determine and provide the necessary data for plants that perform their own SLMCPR calculations, or that operate with fresh fuel batches of non-GE fuel along with second cycle affected GE14 fuel (September 30, 2005). 5. Complete the evaluation to confirm that the RWE analyses do not impact the OLMCPR (September 20, 2005). 6. Provide bundle R-factor and software updates for the on-line 30 core simulator (beginning in August 2005, and extending through the balance of 2005). (viii) Any advice related to the potential defect or failure to comply about the facility, activity, or basic component that has been, is being, or will be given to purchasers or licensees: Affected plants should continue to work with their GE Customer Account Leader to obtain information as plant-specific calculations are completed. ATTACHMENT 1 - Affected and Potentially Affected Plants for Current Operating Cycle [ABSTRACTED] (a) Impact on MFLCPR: Transfer of Information; preliminary analysis indicates MFLCPR impact, GE does not have sufficient information to determine if the OLMCPR could have been exceeded Clinton, Brunswick 1 & 2, Nine Mile Point 2, Fermi 2, FitzPatrick, Dresden 2, LaSalle 1 & 2, Limerick 1 & 2, Peach Bottom 2 & 3, Quad Cities 2, Perry 1, Cooper, Duane Arnold, Monticello, and Hope Creek. (b) Impact on SLMCPR: Transfer of Information; GE does not have sufficient information to determine if there is an impact on the SLMCPR greater than or equal to 0.01 Browns Ferry 2 & 3 (c) Impact of Rod Withdrawal Error (RWE) on OLMCPR: Transfer of Information; GE does not do the analysis for RWE (info provided via telephone during notification to Ops Center) Browns Ferry 2 & 3 }}[[Event description::Description::{{#Regex_clear:The following is a portion of a facsimile received on June 24, 2005 from GE Energy, reference - MFN 05-058 Rev 1: ATTACHMENT 2 - 60-Day interim Report Notification per �21.21(a)(2), and Transfer of Information per �21.21(b) (i) Name and address of the individual informing the Commission: J. S. Post, Manager, Engineering Quality &Safety Evaluations, GE Energy - Nuclear, 3901 Castle Hayne Road, Wilmington, NC 28401. (ii) Identification of the facility, the activity, or the basic component supplied for such facility or such activity within the United States, which may fail to comply or contain a defect: The affected and potentially affected plants are identified in Attachment 1. This concern is limited to plants that have fresh or once-burned GE14 or GE12 fuel with Zircaloy spacers. GE12 fuel with Inconel spacers is not affected. (iii) Identification of the firm constructing the facility or supplying the basic component, which may fail to comply or contain a defect: Global Nuclear Fuel-Americas, LLC, Wilmington, NC. (iv) Nature of the defect or failure to comply and safety hazard, which could be created by such defect or failure to comply: During review of GE14 ATLAS critical power tests results, it was discovered that springs on the Zircaloy test spacers used in the GE14 and GE12 critical power testing were deformed, possibly during the testing. This resulted in a potentially non-conservative critical power determination for fuel bundle corner pin locations. This non-conservatism potentially impacts the calculated margin to the Operating Limit Minimum Critical Power Ratio (OLMCPR), the Safety Limit MCPR (SLMCPR), the Rod Withdrawal Error (RWE) analysis, and the R-factors used in the on-line 3D core simulator. GE has completed the evaluation of the impact on the critical power determination, and has completed the evaluation of the impact on the R-factors. GE has performed a preliminary evaluation of the impact on the margin to the OLMCPR, the impact on the SLMCPR, and the impact on the RWE event. Potentially affected plants have been informed and have taken appropriate compensatory actions. (v) The date on which the information of such a potential defect or failure to comply was obtained: This concern was identified in the GE safety evaluation program on April 26, 2005. (vi) In the case of a basic component which may contain a defect or failure to comply, the number and locations of all such components in use at, supplied for, or being supplied for one or more facilities or activities subject to the regulations in this part: The basic component that may contain a defect is the critical power determination for fresh and once-burned GE14 and GE12 fuel with Zircaloy spacers. GE12 fuel with Inconel spacers and other GNF fuels are not affected. In the US, only GE14 is affected since all GE12 designs in the US have Inconel spacers. (vii) The corrective action which has been, is being, or will be taken: the name of the individual or organization responsible for the action; and the length of time that has been or will be taken to complete the action (note, these are actions specifically associated with the identified Potential Reportable Condition evaluation): GE has completed the evaluation of the impact on the critical power determination and has completed the evaluation of the impact on the R-factors. GE has performed a preliminary evaluation of the impact on the margin to the OLMCPR, the impact on the SLMCPR, and the impact on the RWE event. Plants that may have non-conservative process computer calculated OLMCPR margins have taken compensatory action as necessary based on the magnitude of the non-conservatism to prevent inadvertently exceeding the OLMCPR during plant operating maneuvers. Additional corrective actions planned are as follows: 1. Complete the current-cycle analyses to confirm the non-conservative MFLCPR impact (September 20, 2005). 2. Complete the analysis for previous cycle(s) extending to the previous three years of operation to determine which plants may have a non-conservative MFLCPR (December 15, 2005). 3. Complete the analyses to confirm that no plant has a SLMCPR impact greater than or equal to the reportable threshold of 0.01 (September 20, 2005). 4. Determine and provide the necessary data for plants that perform their own SLMCPR calculations, or that operate with fresh fuel batches of non-GE fuel along with second cycle affected GE14 fuel (September 30, 2005). 5. Complete the evaluation to confirm that the RWE analyses do not impact the OLMCPR (September 20, 2005). 6. Provide bundle R-factor and software updates for the on-line 30 core simulator (beginning in August 2005, and extending through the balance of 2005). (viii) Any advice related to the potential defect or failure to comply about the facility, activity, or basic component that has been, is being, or will be given to purchasers or licensees: Affected plants should continue to work with their GE Customer Account Leader to obtain information as plant-specific calculations are completed. ATTACHMENT 1 - Affected and Potentially Affected Plants for Current Operating Cycle [ABSTRACTED] (a) Impact on MFLCPR: Transfer of Information; preliminary analysis indicates MFLCPR impact, GE does not have sufficient information to determine if the OLMCPR could have been exceeded Clinton, Brunswick 1 & 2, Nine Mile Point 2, Fermi 2, FitzPatrick, Dresden 2, LaSalle 1 & 2, Limerick 1 & 2, Peach Bottom 2 & 3, Quad Cities 2, Perry 1, Cooper, Duane Arnold, Monticello, and Hope Creek. (b) Impact on SLMCPR: Transfer of Information; GE does not have sufficient information to determine if there is an impact on the SLMCPR greater than or equal to 0.01 Browns Ferry 2 & 3 (c) Impact of Rod Withdrawal Error (RWE) on OLMCPR: Transfer of Information; GE does not do the analysis for RWE (info provided via telephone during notification to Ops Center) Browns Ferry 2 & 3 }}| ]] |
| Where | |
|---|---|
| Ge Energy Wilmington, North Carolina (NRC Region 1) | |
| Organization: | Ge Energy |
| Reporting | |
| 10 CFR 21.21 | |
| Time - Person (Reporting Time:+1425.58 h59.399 days <br />8.486 weeks <br />1.953 months <br />) | |
| Opened: | Jason S. Post 13:35 Jun 24, 2005 |
| NRC Officer: | Steve Sandin |
| Last Updated: | Jun 24, 2005 |
| 41794 - NRC Website | |
Ge Energy with 10 CFR 21.21 | |
WEEKMONTHYEARENS 417942005-04-26T04:00:00026 April 2005 04:00:00
[Table view]10 CFR 21.21 Part 21 Notification - Critical Power Determination for Ge14 and Ge12 Fuel with Zircaloy Spacers 2005-04-26T04:00:00 | |