ML042430027

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RAI, Modify Technical Specification 2.3.(4)
ML042430027
Person / Time
Site: Fort Calhoun 
(DPR-040)
Issue date: 08/27/2004
From: Wang A
NRC/NRR/DLPM/LPD4
To: Ridenoure R
Omaha Public Power District
Wang A,/NRR/DLPM/415-1445
References
TAC MC3214
Download: ML042430027 (4)


Text

August 27, 2004 Mr. R. T. Ridenoure Division Manager - Nuclear Operations Omaha Public Power District Fort Calhoun Station FC-2-4 Adm.

Post Office Box 550 Fort Calhoun, NE 68023-0550

SUBJECT:

FORT CALHOUN STATION, UNIT NO. 1 - REQUEST FOR ADDITIONAL INFORMATION (TAC NO. MC3214)

Dear Mr. Ridenoure:

By letter dated May 21, 2004, Omaha Public Power District (OPPD) submitted an amendment request for the Fort Calhoun Station, Unit 1. OPPD proposed to modify Technical Specification 2.3.(4), which concerns the volume of trisodium phosphate required in operating Modes 1 and

2. The staff has completed its preliminary review of this submittal and has determined it needs additional information to complete the review. Our request for additional information is enclosed. This request was discussed with Thomas Matthews of your staff and it was agreed that a response would be provided within 30 days of receipt of this letter.

Sincerely,

/RA/

Alan B. Wang, Project Manager, Section 2 Project Directorate IV Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-285

Enclosure:

Request for Additional Information cc w/encl: See next page

August 27, 2004 Mr. R. T. Ridenoure Division Manager - Nuclear Operations Omaha Public Power District Fort Calhoun Station FC-2-4 Adm.

Post Office Box 550 Fort Calhoun, NE 68023-0550

SUBJECT:

FORT CALHOUN STATION, UNIT NO. 1 - REQUEST FOR ADDITIONAL INFORMATION (TAC NO. MC3214)

Dear Mr. Ridenoure:

By letter dated May 21, 2004, Omaha Public Power District (OPPD) submitted an amendment request for the Fort Calhoun Station, Unit 1. OPPD proposed to modify Technical Specification 2.3.(4), which concerns the volume of trisodium phosphate required in operating Modes 1 and

2. The staff has completed its preliminary review of this submittal and has determined it needs additional information to complete the review. Our request for additional information is enclosed. This request was discussed with Thomas Matthews of your staff and it was agreed that a response would be provided within 30 days of receipt of this letter.

Sincerely,

/RA/

Alan B. Wang, Project Manager, Section 2 Project Directorate IV Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-285 DISTRIBUTION:

PUBLIC

Enclosure:

Request for Additional Information PDIV-2 Reading RidsNrrDlpmPdiv (HBerkow) cc w/encl: See next page RidsNrrLAEPeyton RidsNrrPMAWang RidsOgcRp RidsAcrsAcnwMailCenter CJohnson (RidsRegion4MailCenter)

YDiaz-Castillo ADAMS ACCESSION NO.: ML042430027 Nrr-088 OFFICE PDIV-2/PM PDIV-2/LA PDIV-2/SC NAME AWang:mp EPeyton SDembek DATE 8/27/04 8/27/04 8/27/04 DOCUMENT NAME: C:\\ORPCheckout\\FileNET\\ML042430027.wpd OFFICIAL RECORD COPY

Ft. Calhoun Station, Unit 1 cc:

Winston & Strawn ATTN: James R. Curtiss, Esq.

1400 L Street, N.W.

Washington, DC 20005-3502 Chairman Washington County Board of Supervisors P.O. Box 466 Blair, NE 68008 Mr. John Kramer, Resident Inspector U.S. Nuclear Regulatory Commission P.O. Box 310 Fort Calhoun, NE 68023 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-4005 Ms. Sue Semerera, Section Administrator Nebraska Health and Human Services Systems Division of Public Health Assurance Consumer Services Section 301 Cententiall Mall, South P.O. Box 95007 Lincoln, NE 68509-5007 Mr. David J. Bannister, Manager Fort Calhoun Station Omaha Public Power District Fort Calhoun Station FC-1-1 Plant P.O. Box 550 Fort Calhoun, NE 68023-0550 Mr. John B. Herman Manager - Nuclear Licensing Omaha Public Power District Fort Calhoun Station FC-2-4 Adm.

P.O. Box 550 Fort Calhoun, NE 68023-0550 Mr. Daniel K. McGhee Bureau of Radiological Health Iowa Department of Public Health 401 SW 7th Street, Suite D Des Moines, IA 50309 Mr. Richard P. Clemens Division Manager - Nuclear Assessments Omaha Public Power District Fort Calhoun Station P.O. Box 550 Fort Calhoun, NE 68023-0550

REQUEST FOR ADDITIONAL INFORMATION LICENSE AMENDMENT REQUEST RELATED TO CHANGES IN TRISODIUM PHOSPHATE (TSP) VOLUME REQUIREMENTS OMAHA PUBLIC POWER DISTRICT FORT CALHOUN STATION, UNIT NO. 1 DOCKET NO. 50-285 By letter dated May 21, 2004, Omaha Public Power District (OPPD) submitted an amendment request for the Fort Calhoun Station, Unit 1 (FCS) to modify the Basis for Technical Specification 2.3(4), "Emergency Core Cooling System." The proposed change would delete the specified fixed volume of TSP requirement and would use a new Figure 2-3, "TSP Volume Required for RCS Critical Boron Concentration (ARO, HZP, No Xenon)," instead. Figure 2-3 provides a graph of the volume of TSP required over the operating cycle. The staff has completed its preliminary review of this amendment request and has determined that the following additional information is needed to complete the review.

1.

Figure 2-3 denotes a linear relationship between the minimum volume required of TSP to maintain pH above 7 associated with various reactor coolant system critical boron concentrations. OPPD should clarify if other mechanisms causing loss of TSP besides densification exist and how they were incorporated in the process of construction of the graph in Figure 2-3.

2.

On page 6 of the submittal, OPPD stated that due to densification, the volume of TSP in the baskets typically decreases by approximately 5 percent. The densification process causes a proportional increase in density by reducing the volume. If there is no mass loss of TSP during the entire cycle, the amount of TSP corresponding to 131.9 ft3 would produce a low pH value at the beginning of cycle when boric acid concentration is high and a high pH value at the end of the cycle when boric acid concentration is low. What are these values of pH? Wont the high pH value at the end of the cycle negatively impact the equipment environmental qualification? Please explain.

3.

Do the hydrated forms of TSP have different densities than the dodecahydrate form? If a difference exists, provide its value for a hydrated TSP with specific moisture content (in 47-57% range) used in your calculations.