ML082480671
| ML082480671 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 08/27/2008 |
| From: | Bauder D Calvert Cliffs, Constellation Energy Group, Nuclear Generation Group |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML082480669 | List: |
| References | |
| GL-04-002 | |
| Download: ML082480671 (2) | |
Text
Calvert Cliffs Nuclear Power Plant 0.*:.
stellatio En rgye Nuclear Generation Group U. S. Nuclear Regulatory Commission Washington, DC 20555 1650 Calvert Cliffs Parkway Lusby, Maryland 20657 August 27,2008 ATTENTION:
SUBJECT:
REFERENCES:
Document Control Desk Calvert Cliffs Nuclear Power Plant Unit Nos. I & 2; Docket Nos. 50-317 & 50-318 License Amendment Request:
Replacement of the Trisodium Phosphate Buffer with a Sodium Tetraborate Buffer (a)
NRC Generic Letter 2004-02, "Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at Pressurized-Water Reactors," dated September 13,2004 (b)
Letter from Mr. J. A. Spina (CCNPP) to Document Control Desk (NRC),
dated June 18, 2008, Request for Extension for Completion of Activities Related to Generic Letter 2004-02 Pursuant to 10 CFR 50.90, Calvert Cliffs Nuclear Power Plant (CCNPP) hereby requests an amendment to Renewed Operating License Nos. DPR-53 and DPR-69 to change the containment buffering agent from trisodium phosphate (TSP) to sodium tetraborate (STB). The purpose of this change is to minimize the potential for sump screen blockage concerns under post-loss-of-coolant accident conditions due to a potential adverse chemical interaction between trisodium phosphate and certain insulation materials used in Containment.
This request is an integral part of CCNPPs response to Generic Letter 2004-02 (Reference a) and represents one of the remaining modifications required to achieve full compliance with the requirements of Generic Letter 2004-02 as documented in Reference (b).
Calvert Cliffs Nuclear Power Plant has evaluated the proposed change in accordance with 10 CFR 50.91(a)(l) using the criteria of 10 CFR 50.92(c) and has determined that this proposed change involves no significant hazards considerations as described in Attac hment (l).
The proposed changes to the Technical Specifications are shown in Attachment (2).
Conforming changes to the Technical Specification Bases will be made during implementation of the proposed change.
The buffering agent calculation supporting the requested change is included as Attachment (3). As discussed in Reference (b),
Calvert Cliffs Nuclear Power Plant requests approval ofthe proposed amendment as soon as possible with implementation to occur no later than June 1, 2009 (Unit I) and the spring 2009 refueling outage for Unit 2.
Document Control Desk August 27, 2008 Page 2 Should you have questions regarding this matter, please contact Mr. Jay S. Gaines at (410) 495-5219.
STATE OF MARYLAND TO WIT:
COUNTY OF CALVERT 1, Douglas R. Bauder, being duly sworn, state that 1am Plant General Manager - Calvert Cliffs Nuclear Power Plant, Inc. (CCNPP), and that I am duly authorized to execute and file this License Amendment Request 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 prac. e a d I believe it to be reliable.
Subscribed and sworn before me, a Notary Public in and for the State of Maryland and County of Ca.lve,e. r
, this~ day of QugtA'.:>t
, 2008.
WITt-lESS my Hand and Notarial Seal:
My Commission Expires:
DRB/RDW/bjd
- MIt L Hunter NOTARY rvtIl~
CIIMIt CouI..,.Il"II'~7.lfI!tIiljjjldr ----r-l~~"'-------
..O,JDt/10 Attachments:
(1)
(2)
(3)
Analysis ofthe Proposed Changes Markup ofTechnical Specification Pages Mass of Sodium Tetraborate Decahydrate Buffer Required for Post-LOCA Containment Building Sump pH Control cc:
D. V. Pickett, NRC S. J. Collins, NRC Resident Inspector, NRC S. Gray, DNR