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Letter to Ontario Power Generation regarding Regulatory Hold Point 1

Regulatory Operations Branch

November 5, 2019

Mr. Dietmar Reiner
Senior Vice President, Nuclear Projects
Ontario Power Generation Inc.
1855 Energy Drive, 3C14
Courtice, ON L1E 0E7

SUBJECT: Darlington NGS - Unit 2 Return to Service: Request for CNSC Consent to Remove the Regulatory Hold Point Prior to Fuel Load

Dear Mr. Reiner:

The purpose of this letter is to respond to Ontario Power Generation’s (OPG) request [1] to remove Regulatory Hold Point (RHP-1), allowing fuel to be loaded in the refurbished Darlington Unit 2 reactor core.

Canadian Nuclear Safety Commission (CNSC) staff’s assessment [2, 3] concluded that OPG has met all the pre-requisites established by the Commission to remove RHP-1. Therefore, as the person authorized by the Commission and pursuant to Licence Condition 15.4 of the Darlington Nuclear Generating Station (DNGS) Power Reactor Operating Licence 13.01/2025, consent to remove RHP-1 is hereby granted and fuel may now be loaded into the Unit 2 core.

Yours sincerely,

Ramzi Jammal
Executive Vice-President and
Chief Regulatory Operations Officer
Regulatory Operations Branch

c.c: G. Frappier, N. Riendeau, C. Loreti, D. Desjardins, D. Nguyen, N. Abonasara, K. Hazelton, A. Mathai, C. Yacoub, Darlington Site Office


  1. OPG Letter, D. Reiner and S. Gregoris to R. Jammal, “Darlington NGS Refurbishment – Unit 2 Return to Service: Request for CNSC Consent Prior to Fuel Load (RHP 1)”, November 4, 2019, NK38-CORR-00531-21109.
  2. CNSC staff document entitled: “Request by Ontario Power Generation Inc. to Remove Regulatory Hold Point for Prior To Fuel Load for Unit 2”, dated October 21, 2019.
  3. CNSC memorandum: “Removal of Regulatory Hold Point 1 – Prior to Fuel Load for Darlington NGS Unit 2”, Dated November 5, 2019.

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