ML052210385
| ML052210385 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 08/04/2005 |
| From: | Constellation Energy Group |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| BL-03-001 | |
| Download: ML052210385 (3) | |
Text
B.
Calvert Cliffs Nuclear Power Plant Constellation Generation Group, LLC 1650 Calvert Cliffs Parkway Lusby, Maryland 20657 I
Constellation Energy August 4, 2005 U. S. Nuclear Regulatory Commission Washington, DC 20555 ATT'ENTION:
Document Control Desk
SUBJECT:
Calvert Cliffs Nuclear Power Plant Unit Nos. I & 2; Docket Nos. 50-317 & 50-318
Response
to Request for Additional Information Bulletin 2003-01, "Potential Impact of Debris Blockage on Recirculation at Pressurized-Water Reactors" Regarding NRC Emergency Sump
REFERENCE:
(a)
Letter from Mr. G. Vanderheyden (CCNPP) to Document Control Desk (NRC), dated November 8, 2004, Response to Request for Additional Information Regarding NRC Bulletin 2003-01, "Potential Impact of Debris Blockage on Emergency Sump Recirculation at Pressurized-Water Reactors" By letter dated November 8, 2004 (Reference a), Calvert Cliffs Nuclear Power Plant, Inc. (CCNPP) provided a response to a request for additional information regarding Nuclear Regulatory Commission (NRC)Bulletin 2003-01. On July 5, 2005, CCNPP and NRC personnel held a teleconference to discuss CCNPP's November 8, 2004 response. Below are the three additional NRC questions and CCNPP responses addressed at this teleconference.
Requested Information (1)
What plant procedure contains the steps required to refill the RAYT [refueling water tank] post sump swap-over during LOCA [loss-of-coolant accident]?
CCNPP Resnonse Recirculation actuation signal (RAS) is the CCNPP automatic signal which performs the sump swap-over function during LOCA. EOP-05-1, Loss of Coolant Accident, Revision 21 (Unit 1), page 63, step X, states, "IF RAS ACTUATED, THEN REFILL THE RWT."
Also EOP-08-1, Functional Recovery Procedure, Revision 29 (Unit 1), Appendix 3, page 70, step F states, "IF RAS ACTUATED, THEN REFILL THE RWT." Similar steps are contained in Unit 2 procedures.
$Q03
Document Control Desk August 4, 2005 Page 2 Requested Information (2)
JWhat plant procedure contains the step for injection from refilled RW7?
CCNPP Respons Calvert Cliffs Nuclear Power Plant Unit I Procedure EOP-08-1, Revision 29, Appendix 3, page 81, step H.1.1j provides the actions required to inject from the refilled RWT. Similar steps are contained in Unit 2 procedure.
Requested Information (3)
What additional actions will be taken to enhance guidance for cooldown to adequately address the desire for an aggressive cooldown.
CCNPP Response We believe existing procedures adequately address the desire for aggressive cooldown. However, after the teleconference, we have made changes to EOP-05 and EOP-08 basis documents to ensure that it is clear that the cooldown should be as aggressive as current plant conditions allow. This is not a change in philosophy, but a clarification to specify existing expectations. The following statement was added: "The operator controlled cooldown should be aggressive to achieve cold shutdown as quickly as plant conditions allow." This change has been forwarded to License Operator training personnel to ensure that it is incorporated into applicable training programs.
Document Control Desk August 4, 2005 Page 3 Should you have questions regarding this matter, please contact Mr. L. S. Larragoite at (410) 495-4922.
Very truly yours, STATE OF MARYLAND COUNTY OF CALVERT
- TO WIT:
I, Bruce S. Montgomery, being duly sworn, state that I am Manager - Calvert Cliffs Nuclear Power Plant (CCNPP) Engineering Services, and that I am duly authorized to execute and file this response on behalf of CCNPP. To the best of my knowledge and belief, the statements contained in this document are true and correct. To the extent that these statements are not based on my personal knowledge, they are based upon information provided by other CCNPP employees and/or consultants. Such information has been reviewed in accordance with company practice and I believe it to be reliable.
70 /U I
Sub cribe and sworn before mn, a Notary Polic inand for the State of Maryland and County of Nov7
/2,
, this 4 day of -4a4cuoY
,2005.
P- /
WITNESS my Hand and Notarial Seal:
My Commission Expires:
Dotate Publica-l l
Date' BSM/GT/bjd cc:
P. D. Milano, NRC S. J. Collins, NRC Resident Inspector, NRC R. 1. McLean, DNR