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{{Adams
#REDIRECT [[0CAN071701, Annual 10 CFR 50.46 Report for Calendar Year 2016, Emergency Core Cooling System Evaluation Changes]]
| number = ML17207A163
| issue date = 07/26/2017
| title = Arkansas Nuclear One, Units 1 and 2 - Annual 10 CFR 50.46 Report for Calendar Year 2016, Emergency Core Cooling System Evaluation Changes
| author name = Pyle S L
| author affiliation = Entergy Operations, Inc
| addressee name =
| addressee affiliation = NRC/Document Control Desk, NRC/NRR
| docket = 05000313, 05000368
| license number =
| contact person =
| case reference number = 0CAN071701
| document type = Annual Operating Report, Letter
| page count = 4
}}
 
=Text=
{{#Wiki_filter:0CAN071701 July 26, 2017 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC  20555 
 
==SUBJECT:==
Annual 10 CFR 50.46 Report for Calendar Year 2016 Emergency Core Cooling System Evaluation Changes Arkansas Nuclear One - Units 1 and 2 Docket Nos. 50-313 and 50-368 License Nos. DPR-51 and NPF-6  REFERENCE Entergy submittal to the NRC, "Annual 10 CFR 50.46 Report for Calendar Year 2015 Emergency Core Cooling System Evaluation Changes," dated June 22, 2016 (ML16175A383) 
 
==Dear Sir or Madam:==
 
10 CFR 50.46(a)(3)(ii) requires licensees to report annually each change to or error discovered in an acceptable evaluation model or in the application of such model for the emergency core cooling system (ECCS) that affects the peak cladding temperature (PCT). Entergy Operations, Inc. (Entergy), has reviewed the small and large break loss-of-coolant accident (LOCA) PCT evaluations for both Arkansas Nuclear One, Units 1 and 2 (ANO-1 and ANO-2).
 
No issues were identified for ANO-1 or ANO-2 in 2016 that impacted the results reported for the calendar year 2015 referenced above.
A summary / overview of the information required to be submitted each year is attached to this submittal.
 
This submittal fulfills the reporting requirements referenced above. This letter contains no new regulatory commitments.
Entergy Operations, Inc. 1448 S.R. 333 Russellville, AR  72802 Tel  479-858-4704 Stephenie L. Pyle Manager, Regulatory Assurance Arkansas Nuclear One 0CAN071701 Page 2 of 2 If you have any questions or require additional information, please contact me.
 
Sincerely,
 
ORIGINAL SIGNED BY STEPHENIE L. PYLE 
 
SLP/rwc 
 
==Attachment:==
Summary / Overview of Information for Arkansas Nuclear One, Units 1 and 2 10 CFR 50.46 Annual Report for 2016  cc: Mr. Kriss Kennedy Regional Administrator U. S. Nuclear Regulatory Commission, Region IV 1600 East Lamar Boulevard Arlington, TX 76011-4511  NRC Senior Resident Inspector Arkansas Nuclear One P.O. Box 310 London, AR 72847  U. S. Nuclear Regulatory Commission Attn: Mr. Thomas Wengert MS O-08B1A One White Flint North 11555 Rockville Pike Rockville, MD 20852 
 
ATTACHMENT TO  0CAN071701 Summary / Overview of Information for Arkansas Nuclear One, Units 1 and 2 10 CFR 50.46 Annual Report for 2016 Attachment to 0CAN071701 Page 1 of 1  Summary / Overview of Information for Arkansas Nuclear One, Units 1 and 2 10 CFR 50.46 Annual Report for 2016  Analysis of Record (AOR) Peak Clad Temperature (PCT), (°F) Evaluation Model (EM) Used AOR Date Adjustment as of End-of-Year (EOY 2015), (°F) Net PCT at the EOY 2015, (°F) New Adjustments for Calendar Year 2016, (°F) Net PCT at the EOY 2016, (°F) ANO-1 Small-Break Loss-of-Coolant Accident (SBLOCA) 1459 RELAP5 / MOD2-B&W February 2011 None 1459 (estimated) None (Note) 1459 (estimated) Large-Break Loss-of-Coolant Accident (LBLOCA) 2008.1 RELAP5 / MOD2-B&W July 2005 None 2008.1 (estimated) None (Note) 2008.1 (estimated) ANO-2 SBLOCA 2111 S2M October 2007 None 2111 (analyzed) None 2111 (analyzed) LBLOCA 2144 1999 EM January 2008 None 2144 (analyzed) None 2144 (analyzed)}}

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