ML060390109
| ML060390109 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 02/05/2006 |
| From: | Plant Licensing Branch III-2 |
| To: | |
| chawla M, NRR/DORL, 415-8371 | |
| Shared Package | |
| ML060250224 | List: |
| References | |
| TAC MC5811, TAC MC5812 | |
| Download: ML060390109 (18) | |
Text
Spent Fuel Pool Storage 3.7.17 3.7 PLANT SYSTEMS
-
<-,
3.7.17 Spent Fuel Pool Storage LCO 3.7.17 The combination of initial enrichment, burnup and decay time of each fuel assembly stored in the spent fuel pool shall be within the Unrestricted Region of Figure 3.7.17-1 or in accordance with Specification 4.3.1.1.
APPLICABILflY: Whenever any fuel assembly is stored in the spent fuel storage pool.
ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. Requirements of the LCO A. 1 ------------- NOTE-------------
not met. LCO 3.0.3 is not applicable.
Initiate action to move the Immediately noncomplying fuel assembly to an acceptable location.
Prairie Island Unit 1 - Amendment No. 4-58, 172 Units I and 2 3.7.17-1 Unit 2 - Amendment No. 449, 1621
Spent Fuel Pool Storage 3.7.17 SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.7.17.1 Verify by administrative means the initial Prior to storing enrichment, burnup and decay time of the fuel or moving the assembly is in accordance with Figure 3.7.17-1 or fuel assembly Specification 4.3. 1.1. I SR 3.7.17.2 Verify spent fuel pool inventory. Within 7 days after completion of a spent fuel pool fuel handling campaign Prairie Island Unit I - Amendment No. 158, 172 Units 1 and 2 3.7.17-2 Unit 2 - Amendment No. I4, 162
Spent Fuel Pool Storage 3.7.17
-o years
-5 years 35000 -10 year
-15 year!
-20 year.
30000 25000 E 20000 15000
~ ---4--K t - - 1 <r; 10000 I------.-.-
l . ..-
I..l..j --- 1 RESTRICTED
--
1*
7TF iM - -
5000 0
1 2 3 4 5 InMtial Enrichment (%U235)
Figure 3.7.17-1 Spent Fuel Pool Unrestricted Region Burnup and Decay Time Requirements Prairie Island Unit I - Amendment No. 4148 172 Units 1 and 2 3.7.17-3 Unit 2 - Amendment No. 149, 162
Design Features 4.0 4.0 DESIGN FEATURES (continued) 4.3 Fuel Storage 4.3.1 Criticality 4.3.1.1 The spent fuel storage racks are designed and shall be maintained with:
- a. Fuel assemblies having a maximum U-235 enrichment of 5.0 weight percent;
- b. k4fr < 1.0 iif fully flooded with unborated water, which includes an allowance for uncertainties as described in Reference 1; C. kefr< 0.95 if fully flooded with water borated to 730 ppm, which includes an allowance for uncertainties as described in Reference 1;
- d. A nominal 9.5 inch center to center distance between fuel assemblies placed in the fuel storage racks;
- e. New or spent fuel assemblies with a combination of discharge burnup, initial enrichment and decay time in the "unrestricted range" of Figure 3.7.17-1 may be allowed unrestricted storage in the fuel storage racks; and
- f. New or spent fuel assemblies with a combination of discharge burnup, initial enrichment and decay time in the "restricted range" of Figure 3.7.17-1 will be stored in compliance with Figures 4.3.1-1 through 4.3.1-4.
Prairie Island Unit I - Amendment No. 4 , 72 Units land 2 4.0-2 Unit 2-AmendmentNo. 49, 162
Design Features 4.0 4.0 DESIGN FEATURES 4.3 Fuel Storage (continued) 4.3.3 Capacity The spent ftuel storage pool is designed and shall be maintained with a storage capacity limited to no more than 1386 fuel assemblies not including those assemblies which can be returned to the reactor. The southeast corner of the small pool serves as the spent fuel cask lay down area. To facilitate plant evolutions, four additional storage racks, with a combined capacity of 196, may be temporarily installed in the cask lay down area to provide a total of 1582 storage locations (Ref. 3).
REFERENCES 1. "Prairie Island Units 1 & 2 Spent Fuel Pool Criticality Analysis",
Calculation Note Number CN-WFE-03-40, Westinghouse Electric Company, November 11, 2004.
- 2. "Criticality Analysis of the Prairie Island Units 1 & 2 Fresh and Spent Fuel Racks", Westinghouse Commercial Nuclear Fuel Division, February 1993.
- 3. USAR, Section 10.2.
Prairie Island Unit 1 - Amendment No. 148, 172 Units 1 and 2 4.0-4 Unit 2 - Amendment No. 449, 162
Design Features 4.0 I IX E Fresh Fuel: Must be less than or equal to Nominal 4.95 w/o 235U No restrictions on burnup Assemblies with GAD shall have a minimum of 4 fuel rods with a minimum concentration of 4.0 w/o Gd 2O3.
[I Burned Fuel: Must satisfy minimum burnup requirements of Figures 4.3.1-3 or 4.3.1-4 depending on presence of GAD rods in fresh fuel Figure 4.3.1-1 Spent Fuel Pool Burned/Fresh Checkerboard Cell Layout Prairie Island Unit 1 - Amendment No. 4-58, 1721 Units 1 and 2 4.0-5 Unit 2 - Amendment No. 449, 1621
Design Features 4.0 Interface I
Fresh Fuel: Must be less than or equal to nominal 4.95 w/o 235U No restrictions on burnup Burned Fuel: 3x3 Checkerboard Region Must satisfy minimum burnup requirements of Figure 4.3.1-3 or 4.3.1-4 I Burned Fuel: All Cell Unrestricted Region Must satisfy minimum burnup requirements of Figure 3.7.17-1 I Figure 4.3.1-2 Spent Fuel Pool Checkerboard Interface Requirements Prairie Island Unit 1 - Amendment No. 45, 172l Units 1 and 2 4.0-6 Unit 2 - Amendment No. 4141, 16
Design Features 4.0
..
7iI7-----'-
- J- ----
- -
-- - -Z 1- -F-I-A-
-Oyears J-Oyears 50000 .t--
i- - .-- - 4 -. __ -5 years A
45000 .1 _ j ___. lyears
-4 -- years
.- ;- .-/
J +
450I- -2 years I- 4------ ' -- L-..-- --
40000
----- 1 _ I ,g '---------A ._ ._ .!. ,
35000 0 30000 I.-
rL 25000 m -I-. L1
!. _ A 7 X -If --
_ _ -T.--1 20000 4-j- _y IgZ 4---L j L 15000 1 t NOTACCEP-TAB--LEX---: : :-- i=
10000 t i 5000 I-F
-jfI 0.
2 3 4 5 Initial Enrli.hment (%U235)
Figure 4.3.1-3 Spent Fuel Pool Checkerboard Region Burnup and Decay Time Requirements
- No GAD Prairie Island Unit 1 - Amendment No. +-l 17,2 Units 1 and 2 4.0-7 Unit 2 - Amendment No. 4-9, 162
Design Features 4.0 45000 T
X Fl KFI § V- T -0 years
- 5 years IO-1years I -I 15 years 40000
_-20 years 35000 4 4+ I 0 .......... EP ACC S _T___ j [i . -! //4 -
............ F -
30000
._____. .-T --I l_ . ,. . t _-
I--
25000 _ 4
- - ACCEPTABLE - A, 3
.4l fi Ir<.1IT -i m 20000 177 4iI77I7 - IIT7T§I T7 A - -
I.-..
- 4..
15000 10000
-1 I Li
.-.
+i+i...I .{
.
1t47I I
. .4L4..... --
NOTACCEPTABLE L
-T V - *1--
-i I - -t
.5000 T .-.--r---
1-
-
VN i -.- 1
.41 -
4----
-
0 - h- 1 2 3 4 5 Initial Enrichment (%U235)
Figure 4.3.1-4 Spent Fuel Pool Checkerboard Region Burnup and Decay Time Requirements - Fuel with GAD Prairie Island Unit 1 - Amendment No. 5,172 Units l and 2 4.0-8 Unit 2 - Amendment No. 44 162
Spent Fuel Pool Storage 3.7.17 3.7 PLANT SYSTEMS 3.7.17 Spent Fuel Pool Storage LCO 3.7.17 The combination of initial enrichment, burnup and decay time of each fuel assembly stored in the spent fuel pool shall be within the Unrestricted Region of Figure 3.7.17-- 1 or in accordance with Specification 4.3.1.1.
APPLICABILITY: Whenever any fuel assembly is stored in the spent fuel storage pool.
ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. Requirements of the LCO A. 1 --- - NOTE -------------
not met. LCO 3.0.3 is not applicable.
Initiate action to move the Immediately noncomplying fuel assembly to an acceptable location.
Prairie Island Unit 1 - Amendment No. 4-n, 172 Units I and 2 3.7.17-1 Unit 2 - Amendment No. 449, 162
Spent Fuel Pool Storage 3.7.17 SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.7.17.1 Verify by administrative means the initial Prior to storing enrichment, burnup and decay time of the fuel or moving the assembly is in accordance with Figure 3.7.17-1 or fuel assembly Specification 4.3.1.1.
SR 3.7.17.2 Verify spent fuel pool inventory. Within 7 days after completion of a spent fuel pool fuel handling campaign Prairie Island Unit 1 - Amendment No. 4-58, 172 Units 1 and 2 3.7.17-2 Unit 2 - Amendment No. 4, 1624
Spent Fuel Pool Storage 3.7.17
-0 years 35000 I_1 t. I.__,.- I 1- I .
-5 years
- 10 years
-- -- 1 - l -- ----. f.- --
-15 years
_------ - . _..-----@ _ .4_-- --
-20 years 30000 _ _
_L -t--t
.. 4..._.,..-
, -! .~ s 4.j .... y 25000 SI-
!-t--t- ---- ---
~ t-,--- -t------t-
~ -/I l 20000 3.
,;
15000 1 Xtl_ LL 1--tILt
-X-10000 1 / XI---1-l-- - i --.
5000
--1-!--t--l-- ...
I1 --
t -- !~~ i j III' 1--'
-- ------
0 1 2 3 4 5 InitIal Enrichment (%U235)
Figure 3.7.17-1 Spent Fuel Pool Unrestricted Region Burnup and Decay Time Requirements Prairie Island Unit 1 - Amendment No. -18,172 1 Units I and 2 3.7.17-3 Unit 2 - Amendment No. 449, 162
Design Features 4.0 4.0 DESIGN FEATURES (continued) 4.3 Fuel Storage 4.3.1 Criticality 4.3.1.1 The spent fuel storage racks are designed and shall be maintained with:
- a. Fuel assemblies having a maximum U-235 enrichment of 5.0 weight percent;
- b. keff < 1.0 if fully flooded with unborated water, which includes an allowance for uncertainties as described in Reference 1; C. keff < 0.95 if fully flooded with water borated to 730 ppm, which includes an allowance for uncertainties as described in Reference 1;
- d. A nominal 9.5 inch center to center distance between fuel assemblies placed in the fuel storage racks;
- e. New or spent fuel assemblies with a combination of discharge burnup, initial enrichment and decay time in the "unrestricted range" of Figure 3.7.17-1 may be allowed unrestricted storage in the fuel storage racks; and
- f. New or spent fuel assemblies with a combination of discharge burnup, initial enrichment and decay time in the "restricted range" of Figure 3.7.17-1 will be stored in compliance with Figures 4.3.1-1 through 4.3.1-4.
Prairie Island Unit I - Amendment No. 4- 172 Units l and 2 4.0-2 Unit 2 - Amendment No. 449 162
Design Features 4.0 4.0 DESIGN FEATURES 4.3 Fuel Storage (continued) 4.3.3 Capacity The spent fuel storage pool is designed and shall be maintained with a storage capacity limited to no more than 1386 fuel assemblies not including those assemblies which can be returned to the reactor. The southeast corner of the small pool serves as the spent fuel cask lay down area. To facilitate plant evolutions, four additional storage racks, with a combined capacity of 196, may be temporarily installed in the cask lay down area to provide a total of 1582 storage locations (Ref. 3).
REFERENCES 1. "Prairie Island Units 1 & 2 Spent Fuel Pool Criticality Analysis",
Calculation Note Number CN-WFE-03-40, Westinghouse Electric Company, November 11, 2004.
- 2. "Criticality Analysis of the Prairie Island Units 1 & 2 Fresh and Spent Fuel Racks", Westinghouse Commercial Nuclear Fuel Division, February 1993.
- 3. USAR, Section 10.2.
Prairie Island Unit 1 - Amendment No. 4-5i, 172 Units 1 and 2 4.0-4 Unit 2 - Amendment No. 449, 162 l
Design Features 4.0 I I Fresh Fuel: Must be less than or equal to Nominal 4.95 w/o 235U No restrictions on burnup Assemblies with GAD shall have a minimum of 4 fuel rods with a minimum concentration of 4.0 w/o Gd2O3 .
Burned Fuel: Must satisfy minimum burnup requirements of
[ l Figures 4.3.1-3 or 4.3.1-4 depending on presence of GAD rods in fresh fuel Figure 4.3.1-1 I Spent Fuel Pool Burned/Fresh Checkerboard Cell Layout Prairie Island Unit 1 - Amendment No. 458, 172 Units 1 and 2 4.0-5 Unit 2 - Amendment No. 449, 1621
Design Features
- 4.0
,,I 1: x" -,;,: :
ii " j I:Is:, 11, RI.:
,i, ,
Interface - I I II I . ; 1:
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. 3,
_________ .1. . I I II Fresh Fuel: Must be less than or equal to nominal 4.95 w/o 235U No restrictions on burnup Burned Fuel: 3x3 Checkerboard Region Must satisfy minimum burnup requirements of Figure 4.3.1-3 or 4.3.1-4 I Burned Fuel: All Cell Unrestricted Region Must satisfy minimum burnup requirements cf Figure 3.7.17-1 I Figure 4.3.1-2 I Spent Fuel Pool Checkerboard Interface Requirements Prairie Island Unit 1 - Amendment No. 1-59, 172 Units 1 and 2 4.0-6 Unit 2 - Amendment No. 449, 162 1
Design Features 4.0
-O years 50000
-5 years
-10 years
-15 years 45000 -20 years 40000 35000 M 30000 I-3:
7f*71 IJtiz
_____________ I Z- 25000 C
- m. A
. o^ , 1 4--....- .--.
- .. I -
- I , , .. ..4..._.... r _ I.4....
._._ __ __.t.
20000 / -j-D fW - -- --- ---- -- - .- -
--
._'._J . j . _. _.i ./_. + _ , _
'.4
/U ! . - I
..- .. r- - .I 15000
--t--,--NOT ACCEPTABLE -+
--. - !v T .. I 10000 5000 0
1 2 3 4 5 Initial Enrichment (%U235)
Figure 4.3.1-3 Spent Fuel Pool Checkerboard Region Burnup and Decay Time Requirements
- No GAD Prairie Island Unit 1 - Amendment No. 454 172 Units 1 and 2 4.0-7 Unit 2 - Amendment No. 4l49, 162
Design Features 4.0 I I I . I . I . I I . . . I i 45000 l - 4 -
-0 years
. I +
l l--
I
_.- _ . .. _ --Vi -5 years
-1O years S-t- . .j....-.f.. - - -. ,- - -
- 15 years 40000
- - ;-t-_ . -- --
- W _ . e--- -20 years
. -. _. t 1---
--- . .-- -.. --- 1-771 --
.
35000 f -- I
. I -.- . 1 30000 4 r r-4-j-. .1.
I:
f ii I
.
izi!i7ii7 IlITI.
.1 _________
_________
____ ___
I~-
E 25000 ACCEPTABLE ... -
m.0 M~20000
.K417-LI
.- ,-. -
lijii7ii711J77.ij 15000 2- tX27J 4i27+/-1 K I -.
10000 NOT ACCEPTABLE L + V - '----v -+/-
5000
-
k I
.i.b.i 7F $1 0
1 2 3 4 5 Initial Enrichment (%U235)
Figure 4.3.1-4 Spent Fuel Pool Checkerboard Region Burnup and Decay Time Requirements - Fuel with GAD Prairie Island Unit 1 - Amendment No. 4-5.8, 172 Units l and 2 4.0-8 Unit 2-Amendment No. 449, 162