ML20128E813
| ML20128E813 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 02/04/1993 |
| From: | Steven Bloom Office of Nuclear Reactor Regulation |
| To: | Tira Patterson OMAHA PUBLIC POWER DISTRICT |
| References | |
| TAC-M85116, NUDOCS 9302110086 | |
| Download: ML20128E813 (4) | |
Text
f(
l xAhw
' February 4. 199f 6
(S.1
- Docket No. 5022P,5=
Mr. ' Tery L', Patterson - _
l Division Mauager.- Nuclear Operation Omaha Public Power District
,444 South 16th Street Mall Mailt Stop 8E/EP 4
,x Omaha, Nebraska-68102-2247-m,W
Dear Mr. Patterson:
SUBJECT:
SPENT FUEL POOL RERACK - REQUEST FOR ADDITIONAL INFORMATION (RAI FORT CALHOUN STATION, UNIT 1 (TAC NO. M85116)
- By letter dated December 7, 1992, you proposed revisions to amend Technical Saecificationi 2.8, 3.2 (Table 3-5), 4.4.2, 5.10.3, and Figure 2-10.
These L.
.clanges will allow-an increase in the number of spent fuel assemblies which may be stored in the spent fuel pool upon modification to the spent fuel pool storage racks.
To co1tinue our review we need additional information and a commitment from=you.
The commitment is to use Appendix A of Regulatory Guide
'DG-8006 Lif you-use diversifor the rerack. The enclosed questions and commitment were discossed by the NRC staff and your staff in a-telecon on e
f January 27, 1993. As discussed during the telecon, we anticipate.your' responses tozour request _ for additional information to be submitted within four weeks.
If you'have..any questions about this matter, please do not' hesitate to call me
.at (301)504-1313. -This requirement affects fewer than 10 respondents and, therefore,.is not subject to Office of_ Management and Budget review under t
Public' Law 96-511.
~
/5/
Sincerely, Stev n D.. Bloom, Project Manager-Project. Directorate'IV-1 Division:of Reactor Projects III/IV/V Office of Nuclear Reacto.r Regulation Enclosute:
a J.Al w.-
cc1w/ enclosure:
See next page-plSTRIBUTIONI
- DocketlFilej
. PD4-Reading file NRC & Local PDRs
-J.
Roe Mr Virgilio G. Hubbard P. Noonan.
LS. Bloom.
OGC:
ACRS (10)
PDIV'P1 ant. File.
'P.-Harrell', Region IV.
0FFICED PDIV-1/LA v i PDIV-1/PM-PDIV-1/D N
'NAME)
PNoona N b - SBlogNs't}'
'GHubbard DATEi 9 /d'93 ~
'2-/M/93 X'/I/93 0FFICIAL 0OCUMENT NAME: FC85116.RAl-g 090027.5
__ _ -py 9302110086 930204
~
^ * ' " _
~~ a w 8 k w-DR'ADOCK05000g5 h1F
[StAfC'%
UNITED STATES 8 '~
NUCLEAR REGULATORY COMMISSION g
g WASHING T ON, D. C. 205%
g4 7
4 4
e
*q
,/
Febr'Jary 4, 1993 Docket No. 50-285 Mr. Terry L. Patterson Division Manager - Nuclear Operation Omaha Public Power District 444 South 16th Street Hall Mail Stop BE/EP 4 Ornaha, Nebraska 68102-2247
Dear Mr. Patterson:
SUBJECT:
SPENT FVEL P00L RERACK - REQUEST FOR ADDITIONAL INFORMAT40N (RAI)
FORT CALHOUN STATION, UNIT I (TAC NO M85116)
By letter dated December 7, 1992, you proposed revisions to amend Ttchnical Specifications 2.8, 3.2 (Table 3-5), 4.4.2, 5.10.3, and Figure 2-10.
These changes will allow an increase in the number of spent fuel assemblie; which may be stored in the spent fuel pool upon modification to the spent tuel pool storage racks.
To continue our review we need additional information and a commitment from you.
The commitment is to use Appendix A of Regulatory GuiG DG-8006 if you use divers for the rerack. The enclosed questions and commitment were discussed by the NRC staff and your staff in a telecon or.
January 27, 1993. As discussed during the telecon, we anticipate your responses to our request for additional information to be submitted within four weeks.
If you have any questions about this matter, please do not hesitate to call me at (301)504-1313. This requirement affects fewer than 10 respondents and, therefore, is not subject to Office of Management and Budget review under Public Law 96-511.
Sincerely,
(
, /)
teven D. Bloom, Project Manager Project Directorate IV-1 Division of Reactor Projects III/IV/V Office of Nuclear Reactor Regulation
Enclosure:
RAI cc w/ enclosure:
See next page i
1
Mr.-Terry L. Patterson Omaha.Public Power District Fort Calhoun-Station, Unit No. I g j.
cc:
Harry H. Voigt, Esg.
LeBoeuf, Lamb, Leiby & MacRae 1875 Connecticut Avenue, NW Washington, D.C.
20009-5728 Mr. Jack Jensen, Chairman Washington County Board of Supervisors P'. air, Nebraska 68008-Mr. Raymond P. Mullikin, Resident Inspector U.S. Nuclear Regulatory Commission Post Office Box 309 Fort Calhoun, Nebraska 68023 Mr. Charles B. Brinkman, Manager Washington Nuclear Operations Combustion Engineering, Inc.
12300 Twinbrook Parkway, Suite 330 Rockville, MD 20852
-Regional Administrator, Region IV U.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76011 Harold Borchert, Director Division of Radiological Health Nebraska Department of Health 301 Centennial Mall, South Post Office Box 95007 Lincoln, Nebraska 68509 Mr. James W. Chase, Manager fort Calhoun Station Post Office Box 399 Fort Calhoun, Nebraska 68023
f
?W,
'o-
'[NCLOSURE!
'l q
QUESTIONS ON FT. CALHOUN RERACK 1
1.
The Holtec Licensing Report states that a moderator temperature of 4*C, I
corresponding to the maximum possible moderator density, was assumed for-the criticality analysis to assure that the.true reactivity will always be lower over the expected range of water temperatures.
However, since theSCALEcrosssectionlibraryasused-byNITAWLhasscattering matrices only at 20*C-and 277 C, explain how the reactivity.at 4 C was obtained.
2.
The reactivity calculations for the use of CEAs inserted into fuel assemblies assumed that the CEA was depleted to 75% of its initial boron-10 loading for conservatism. What amount of depletion is.
anticipated for the cycle life of a ty)ical CEA and what amount of core insertion during CEA lifetime is this
>ased on?
3.
Proposed Technical Specification 2.8(12) requires a minimum boron concentration of 100 ppm in the spent. fuel pool whenever storing unirradiated fuel in the pool. However, since credit is taken for soluble boron for accident conditions such as lateral motion of the rack modules under seismic conditions, this Technical Specification should require a minimum boron concentration in the spent fuel pool at all times.
i t
l l
.