ML101400492
| ML101400492 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 05/20/2010 |
| From: | Patricia Anderson Entergy Nuclear Operations |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| Download: ML101400492 (4) | |
Text
May 20,2010 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Palisades 27780 Blue Star Memorial Highway Covert, MI 49043 Tel 269 7642000 Paula K. Anderson Licensing Manager 10 CFR 50.46
Subject:
Annual Report of Changes in Emergency Core Cooling System Models for Large and Small Break LOCA Palisades Nuclear Plant Docket 50-255 License No. DPR-20
Dear Sir or Madam:
Entergy Nuclear Operations, Inc. (ENO) is submitting this annual report of changes in the emergency core cooling system (ECCS) models for the Palisades Nuclear Plant (PNP). The report is submitted in accordance with 10 CFR 50.46(a)(3)(ii).
Areva Condition Report (CR) 2009-2309 was written to address issues related to S-RELAP5 code errors. These issues impacted the large break loss of coolant accident (LOCA) analyses for Cycle 21. Idaho National Laboratory (INL) announced that the errors involved coding of point kinetics and heat conduction models.
Corrections provided by I were installed S-RELAP5. The estimated change based large break is -22 degrees Fahrenheit. contains the large break LOCA peak clad temperature (PCT) summary. contains the small break LOCA PCT summary. There are no changes to the small break LOCA since the 2009 30-day report. This report covers the period from May 20, 2009, through May 20, 2010.
This letter contains no new commitments and no revisions to existing commitments.
pkalbed : Large Break Loss of Coolant Accident Peak Cladding Temp. Summary : Small Break Loss of Coolant Accident Peak Cladding Temp. Summary CC Administrator, Region III, USNRC Project Manager, Palisades, USNRC Resident Inspector, Palisades, USNRC
.6.PCT (OF)
PCT (OF)
PCT (Last Acceptable Model Resultsl New Cycle 21 Analysis 1740 10 CFR 50.46 Changes CR 2009-337 S-RELAP5 Radiation to Fluid Correlation Under
-27 1713 Predicts the Radiative Heat Transfer PCT (2009 Annual Report) 1713 10 CFR 50.46 Changes CR 2009-2309 S-RELAP5 Kinetics and Heat Conduction
-22 1691 Model PCT (2010 Annual Report) 1691 Page 1 of 1
~PCT eF)
PCT (OF)
PCT (Last Acceptable Model Results) New Cycle 21 Analysis 1734 10 CFR 50.46 Changes CR 2009-337 S-RELAP5 Radiation to Fluid Correlation Under
-64 Predicts the Radiative Heat Transfer PCT (2009 Annual Report) 1670 10 CFR 50.46 Changes CR 2009-2309 S-RELAP5 Kinetics Model
+4 PCT (2009 30-Day Report) 1674 PCT (2010 Annual Report) 1674 Page 1 of 1