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Category:E-Mail
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2024-08-01
[Table view] |
Text
Accession No. ML102940006
From: Tam, Peter Sent: Wednesday, October 20, 2010 4:00 PM To: 'hletheridge@aep.com'; mkscarpello@aep.com; jrwaters@aep.com Cc: Huang, Tai; Ward, Leonard; Mendiola, Anthony; Ulses, Anthony; Pascarelli, Robert
Subject:
D. C. Cook Unit 2 - Draft questions for the 10/21/10 conference call re. the proposed LBLOCA amendment (TAC ME1017)
Michael: Following please find draft questions regarding post-LOCA boric acid precipitation that we would discuss with you in the 10/21/10 conference call.
- 1. Information regarding the D.C. Cook Unit 2 NSSS:
- a. Volume of the lower plenum, core and upper plenum below the bottom elevation of the hot leg, each identified separately. Also provide heights of these regions
- b. Loop friction and geometry pressure losses from the core exit through the steam generators to the inlet nozzle of the reactor vessel. Also, provide the locked rotor RCP k-factor. Please provide the mass flow rates, flow areas, k-factors, and coolant temperatures for the pressure losses provided( upper plenum, hot legs, SGs, suction legs, RCPs, and discharge legs). Please include the reduced SG flow areas due to plugged tubes. Please also provide the loss from each of the intact cold legs through the annulus to a single broken cold leg. Please also provide the equivalent loop resistance for the broken loop and separately for the intact loop.
- c. Capacity and boron concentration of the RWST.
- d. Capacity of the condensate storage tank
- e. Flushing flow rate at the time of switch to simultaneous injection
- f. HPSI runout flow rate
- g. Capacities and boron concentrations for BIT storage tanks
- h. Flow rate into the RCS from the BIT
- 2. Please provide the following elevation data:
- a. bottom elevation of the suction leg horizontal leg piping, cold leg diameter
- b. top elevation of the cold leg at the reactor coolant pump discharge
- c. top elevation of the core (also height of core)
- d. bottom elevation of the downcomer
- 3. Please provide the limiting bottom and top skewed axial power shapes.
The NRC staff will finalize a list of questions based on the above, as well as several sets of draft questions previously transmitted to you by e-mail. You will be requested to formally respond to the formal RAI.
Peter S. Tam Senior Project Manager (for D. C. Cook and Monticello) Plant Licensing Branch III-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation
Tel. 301-415-1451 E-mail Properties Mail Envelope Properties (3D6B1F4F51D25E4E9B6C93FF92DAE5171443BF9B37)
Subject:
D. C. Cook Unit 2 - Draft questions for the 10/21/10 conference call re. the proposed LBLOCA amendment (TAC ME1017)
Sent Date: 10/20/2010 4:00:30 PM Received Date: 10/20/2010 4:00:00 PM From: Tam, Peter
Created By: Peter.Tam@nrc.gov
Recipients:
hletheridge@aep.com ('hletheridge@aep.com')
Tracking Status: None mkscarpello@aep.com (mkscarpello@aep.com)
Tracking Status: None jrwaters@aep.com (jrwaters@aep.com) Tracking Status: None Tai.Huang@nrc.gov (Huang, Tai)
Tracking Status: None Leonard.Ward@nrc.gov (Ward, Leonard)
Tracking Status: None Anthony.Mendiola@nrc.gov (Mendiola, Anthony)
Tracking Status: None Anthony.Ulses@nrc.gov (Ulses, Anthony)
Tracking Status: None Robert.Pascarelli@nrc.gov (Pascarelli, Robert)
Tracking Status: None
Post Office: HQCLSTR02.nrc.gov
Files Size Date & Time
MESSAGE 12090 10/20/2010
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Priority: olImportanceNormal ReplyRequested: False Return Notification: False
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