ML040280490

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Facsimile Transmission, Draft Request for Additional Information
ML040280490
Person / Time
Site: Seabrook NextEra Energy icon.png
Issue date: 01/28/2004
From: Nerses V
NRC/NRR/DLPM/LPD1
To: Darrell Roberts
NRC/NRR/DLPM/LPD1
References
TAC MC1097
Download: ML040280490 (3)


Text

January 28, 2004 MEMORANDUM TO: Darrell J. Roberts, Acting Chief, Section 2 Project Directorate I Division of Licensing Project Management Office of Nuclear Reactor Regulation FROM: Victor Nerses, Sr. Project Manager, Section 2 /RA/

Project Directorate I Division of Licensing Project Management Office of Nuclear Reactor Regulation

SUBJECT:

SEABROOK STATION, UNIT NO. 1, FACSIMILE TRANSMISSION, DRAFT REQUEST FOR ADDITIONAL INFORMATION (TAC NO.

MC1097)

The attached draft RAI was transmitted by facsimile on January 28, 2004, to Mr. OKeefe of FPL Energy Seabrook, LLC (the licensee). This draft RAI was transmitted to facilitate the technical review being conducted by NRR staff. The RAI was related to the licensees October 6, 2003, submittal regarding the implementation of alternate source term Review of the RAI would allow the licensee to determine and agree upon a schedule to respond to the RAI. This memorandum and the attachment do not convey or represent an NRC staff position regarding the licensees request.

Docket No. 50-443

Attachment:

Draft RAI

January 28, 2004 MEMORANDUM TO: Darrell J. Roberts, Acting Chief, Section 2 Project Directorate I Division of Licensing Project Management Office of Nuclear Reactor Regulation FROM: Victor Nerses, Sr. Project Manager, Section 2 /RA/

Project Directorate I Division of Licensing Project Management Office of Nuclear Reactor Regulation

SUBJECT:

SEABROOK STATION, UNIT NO. 1, FACSIMILE TRANSMISSION, DRAFT REQUEST FOR ADDITIONAL INFORMATION (TAC NO.

MC1097)

The attached draft RAI was transmitted by facsimile on January 28, 2004, to Mr. OKeefe of FPL Energy Seabrook, LLC (the licensee). This draft RAI was transmitted to facilitate the technical review being conducted by NRR staff. The RAI was related to the licensees October 6, 2003, submittal regarding the implementation of alternate source term Review of the RAI would allow the licensee to determine and agree upon a schedule to respond to the RAI. This memorandum and the attachment do not convey or represent an NRC staff position regarding the licensees request.

Docket No. 50-443

Attachment:

Draft RAI DISTRIBUTION PUBLIC D. Roberts V. Nerses C. Lauron PDI-2 Reading Accession Number: ML040280490 *memo from Lund OFFICE PDI-2/PM EMCB/SC*

NAME VNerses LLund DATE 1/28/04 1/26/04 OFFICIAL RECORD COPY

DRAFT REQUEST FOR ADDITIONAL INFORMATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION FACILITY OPERATING LICENSE NO. NPF-86 FPL ENERGY SEABROOK, LLC SEABROOK STATION DOCKET NO. 50-443 TAC NO. MC1097 The fission products which result from significant core damage can be limited from escaping the containment environment through chemical means. In particular, elemental iodine formed during the accident can be held in the liquid phase in the sump if the sump is at a pH of 7.0 or greater.

Sump pH is dependent on the post-LOCA production of acids (Hydroiodic Acid, Hydrochloric Acid, and Nitric Acid) and the post-LOCA production and/or addition of bases (Cesium Hydroxide and Sodium Pentaborate).

1. The staff requests the licensee to provide additional details related to the assumptions used in calculating sump pH. Specifically, the staff requests the licensee to list the sources of post-LOCA acid generation affecting the sump pH and the mechanism of acid formation for each source (e.g., formation of HCl from the decomposition of cable insulation).

In addition, the staff requests a time dependent list of the calculated post-LOCA acid generation and sump pH values similar to the following example table.

Time (hours) HCl moles HI moles HNO3 moles pH 2 102 .3 4 7.12

2. The staff requests the licensee to demonstrate how the sump pH will be maintained above 7 for the period of 30 days.
3. If the sump pH was determined through the use of a computer code, the staff requests the licensee to identify the code and to detail the input and output of the code.

If the sump pH was determined through another analysis, the staff requests the licensee to provide details of the calculations including assumptions.

ATTACHMENT