I

.'

. .

'

- LN E

.

THERMAL POWER LEVEL, %

. 120112

(35, 112)(-34, 112) - 110-

| ACCEPTABLE

m; = 1.69 | *2 .0= -

OPE 10N(-47, 90)

| 86.85 90 (46, 90)..

| ACCEPTABLEI I| go| |

""

l |4 & 3 PUMP !| | OPERATION-

||

[l 70

|..

I (46, 64.85)(-47, 64.85) iI

| | 58.88 60 I..

I IACCEPTABLE l|

| 1 4, 3 & 2 PUMP 50 I ,..

I I CPERATION |

I I 40 I..

(-47, 36.88)I I | (46, 36.88),

I II 30 g, |

|.-

[ l I I

UNACCEPTABLE sI ., | 20 l IUNACCEPTABLE..

OPERATION 'I I "I NI N OPERATIONa I aI " "10

-| -1 :| |<--

-

f f ? f it I f I t t I I I I t |

-60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70,

a or

SMUD CYCLE 5 CORE PROTECTION . SAFETY LIMITS

CURVE REACTOR COOLANT DESIGN FLOW, GPM

: :'u;: K01 YH ORidlAL3 187,986

. SAC 9AMENTO MUNICIPAL UTILITY DISTRICT

-

. - - _ - _ - _ _ _ _ - - - _ .

iI.

Figure 2.3-2 PROTECTIVE SYSTEM MAXIMUM ALLOWABLE SETPOINTS,

REACTOR POWER IMBALANCE (CYCLE 5 ).

THERMAL POWER LEVEL, %

'08 ''(-16,108) (16,108)EpCCEPTABL !

m = 1.0 |4 PUMP 100 m = 1.0.

I 3PERATION | 2

(-32,92)|

, . go (32,92),

I I I II I 80.35 80 i |

ACCEPTABL E | ||

4 & 3 PUMP. 70 | |(32,64.35)(-32,64.35)| qPERATION |

.

| I 60 | [.

52.38 ! !|l .\CCEPTABLl | |I 4,3&2 PUMF

| I40(-32, 36.38) fPERATIOr, g

i I I |30

|1 --

I I! ! UNACCEPTABLE

| UNACCEPTABLE | |

OPERATION ,| |l ! OPERATION

~~'

fI |E7I I jo |

..

I e a au

"

i t i* I "I I I i 1= I =1 I I i

-60 -50 -40 -30 -20 -10 0 to 20 30 40 50 60

a?EA ,

eReactor Power Imbalance

SMUD CYCLE 5 MAXIMUM ALLOWABLE SETPOINTS .. :ttef

CURVE REACTOR COOLANT DESIGN FLOW, GPM -*'

| 1 387,600

2 288,374 $MU| 3 187,986 SACRAMENTO MUNICIPAL UTILITY DISTRICT

!'

. _ .

.

.

, .

FIGURE 3.5 2-1 Rod index Vs Power LevelRancho Seco Cycle 50 - 60 EFPD

110!

105 (197,102) (288, 102)_

100 _'

95 _

90 (280 92)_

85 (270,81)_

80 .

operation75 Not Allowed"

70 .

65 -

60*, "***"IC**d-,

55-

y 50 (122,50) (232,50)_

_

2 45 _

40 _

35 _

30 _

25 _

Operation20All **d_

15 (60,15}_

10 .

(0,6.6) 5 _

| 0 t i i i i t i t t t ' ' ' '

o 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300

Rod Index

t f f I I I I ' ' I

o 25 50 75 100 0 25 50 75 100

g i I f f

0 25 50 75 100

Bank 6,

|

PROPOSEDONLY

NOT YET OfflClAL1

$SMUDSACRAMENTO MUNICIPAL UTILITY DISTRICT

L, .

,,-,- -- - - - - . - - ..- - - - , - .

.

FIGURE 3.5.2-2 Rod index vs Power LevelRancho Seco Cycle 550 - 250 EFPD

110105 (259,102) (280, 102)-

100 _

95 (280,92)-

90 _

85 Operation_

Not Allowed80 (270,8C )_

*75

[g_

70 _

65 J_

60,; _

55; _

y 50 (196,50) (232,50)_

2 h5 _

ho _

35 _

30 -

_

25 .

20 Operation_

15 (118,15) Allowed_

(0,6,6)10 _

5 _

o i i i i i ' ' ' ' ' ' ' ' '

0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300Rod index

i , i i i i I I ' J

0 25 50 75 100 0 25 50 75 100

e i t t i

0 25 50 75 100

Bank 6*

-

PR3P03EDDNLYNui ki uccel

.

$sMunSACRAMENTO MUNICIPAL UTILITY DISTRICT-

~

;

FIGURE 3.5 2- 3 Rod index Vs Pcwer Level |Rancho Seco Cycle 5J

230 EFPD - EOC (APSR Out) 1

Four Pump Operation

.

110105 -

(244,102) (273,102)_

100 _

95 (267,92<.

90 $-

85 [ (240,80)_

80 Operation |

Not Allowedg>.

75 _

70 _

65 -

,, 60 _

55,- (174,50)_

y 50 -

2 45 _

40 Operation_

35 Allowed-

30 _

25 _

20 _

15 (96,15)_

10 _

5 _

0 t 0 3) e i i ., , , , , , , ,

0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300-

Rod index

t_ i i t i , , , , ,

0 25 50 -75 100 0 25 50 75 100

e i i i ,

0 25 50 75 100

Sank 6

PROPOSEDONLYNDT YEfOfflCIALl

esuuoSACRAMENTO MUNICIPAL UTILITY DISTRICT

.--. . .- . _. - - . . - .

. _ __ ___ . - _ _ .

FIGURE 3.5 2- 4 Rod index Vs Power LevelRancho Seco Cycle 50 - 60 EFPD3 Pump Operation

110 ,105

100 .(197,102)' (270,10:')_

95 .

90 _ operation85 Not Allowed-

80 _

75 _

70 Restricted.

65 (232,64)-

60,, _

55,- (122,50)_

50j -

ct 45 _

40 _

operation35 Allowed_

30 _,

25 _

20 _

15 (60,15)_ ,

10 .

(0,6.6) 5,

o e 's i , , , , , , , , , , ,

0 20 40 60 30 100 120 140 .160 180 200 220 240 260 280 300

Rod Inde>

i f f i i1 1 I 1 ..j0 25 50 75 100 0 25 50 75 100

I I t I i

o 25 50 75 100!

Bank 6!

f

PROPOSEDgyLy

NOT YET OFRug

gsuuoSACRAMENTO MUNICIPAL UTILITY DISTRICT.

'.. . . - .

_

FIGURE 3.5.2- 5 Rod Index Vs Power LevelRancho Seco Cycle 550 - 250 EFPD3 Pump Operation

110105

(259,102) (270,10t)_

too .

95 _

90 .

85[_

80 3_

Operationnot Allowed |75 ~

,n 4- (232,64)65 _

60,, _

55-

(196,50)_j 50 _

2 45 _

LO _

35 _

30 Operation_

25 Allowed-

20 _

15 (118,15)_

10(0,6.6) 5

_

0 i i i i i i i e i e i i i e

o 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300

Rod Index-

t

{ t__ t t I I f i t 1 i

0 25 50 75 100 0 25 50 75 100

t I f f f

0 25 50 75 100

Sank 6

Pil0P03ED ONLY'

enrveiorrelA|.neremkut iL|

|

9suuoSACRAMENTO MUNICIPAL UTILITY DISTRICT

l

---.

;

FIGURE 3 5.2-6 Red index vs Power Level !Rancho Seco Cycle 5 !

230 EFPD - EOC (APSR Out)3 Pump Operation

110105 (244,102)100

95 _

90 _

85 _

80 _

75 operation_

Not Allowed-70 _

65 _

60,, _

55 (174,50)- _

E 50 _

b 45 _

60 _

35 _

30 Operation_

25 AII **d_

20 .

15 (96,15)_

10 _

5 _

0 i (0 4) i i i i i , , , i , ,

0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300Rod index

1 i i i j | | t ; |

0 25 50 75 100 0 25 50 75 100

1 1 f f f

0 25 50 75 100

Bank 6

.

PROPOSECONLYId.tt i7 y ,i,

y r$o, N,,

Ili b LG

$SMUDSACRAMENTO MUNICIPAL UTILITY DISTRICT

.

*

.

FIGURE 3.5.2-7 APSR Withdrawal Vs Power LevelRancho Seco Cycle 5APSR Position Limits (0-600)

110 -

(6,102) (29,102)

100 -

(6,92) (30,92) RESTRICTEDREGION90 -

80 (0,80) 7,80)

70 -

,~

m

3 60 -

(100,50)_

*50 -,

O PERMISSIBLE# OPERATING

40 REGION--

g32 30 -

20 .

10 -

0 I f f f I I 1 I I ' I

o 10 20 30 40 50 60 70 80 90 100 110

APSR withdrawal, %

nai ioa, , r

,

h\h ft 3 e

esuuoSACRAMENTO MUNICIPAL UTILITY DISTRICT,

, e

.

FIGURE 3.5.2-8 APSR Withdrawal Vs Power LevelRancho Seco Cycle 5APSR Position Limits (50-2500)

110 -

(6,102) (32,102)RESTRICTED

100 -REGION

,92) (38,92)90 -

(0,80) 45,80)80

70 -e3

h 60 -

C(100,50)*

50 -%0 PERMISSIBLE** OPERATING

0 -REGION.

uv

3'

30-

20 -

10 -

0 ' ' ' ' ' ' ' ' ' ' '

O 10 20 30 40 50 60 70 80 90 100 110

.aPSR withdrawal, %

.

rnua edw dial-

NOT Ytl N iCIAL

$SMU=CACRAMENTO MUNICIPAL UTILITY DISTRICT,

I.

.

FIGURE 3 5.2-9 Coro imbalance Vs Power LevelRancho Seco Cycle 50 - 60 EFPDimbalance Envelope

[.

110 -

(-13,102) (23,102)

f100 RESTRICTED-

REGION J(-14,92) (23,92)90 -

80 -26,80) (26,80)-

o

j 70 -

3

j 60 -

/(-50,50) (50,50)50 .

e

J PERMISSIBLEo 40 OPERATING-

2 REGION

30 -

20 .

.

10 .

i i e t t i e i i

-50 -40 -30 -20 -10 0 10 20 30 40 50

Core imbalance, %

. nw aom bo. Y_

i$) 'i i i

g SACRAMEN'f 0 MUNICIPAL UTILITY DISTRICTsuuo

_- _ _ - - - - - -____

.

'..

FIGijRE 3.5.2-10 Core imbalance Vs Power LevelRancho Seco Cycle 550 250 EFPO (APSR in)Imbalance Envelope

110 i--;

(-18.102) (73,102) l

100 -

RESTRICTEDREGION (-21,92) (23,92)

3g ,_

80 -32,80) (26,80)_

70 _

3j 60 -

%

(-50.50) (50,50)50 -

PERMISSIBLE-

U 40 OPERATING-

j*

REGION

30 -

20 -

10 -

0 i ' ' ' ' ' ' ' ' 8

-50 -40 -30 -20 -10 0 10 20 30 40 50.

Lore imbalance, %

PRBPCSEDybygre.

h a l p{? f w a$a m!,_ _ .

li A. lP

$' SACRAMENTO MUNICIPAL UTILITY DISTRICTSMUD

-

+ aO

*

.

.

.

FIGURF 3 5.2-11 Core imbalance Vs Power Leve!Rancho Seco Cycle 5230 EFPD - EOC (APSR Out)Imbalance Envelope

~

110(-27,102) (14,102)

~

RESTRICTEDREGION (-28,92) (IO'92)

, .

90 -

'

(-28,80) (28,80)80 -

$ 70 -

3~

~

PERMISSIBLEs

OPERATING _(32,50)- - ~(-50,50)o 50 REGION-

e >.

'

[ 40 -

8"

30 -

0 THIS FIGURE VALID ONLY FOR OPERATION-

AFTER APSR WITHDRAWALto -

' ' ' ' ' ' ' ' ' ' '0-60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60

Core imbalance, %

.

PROPOSE [IDNLY

Nlif YEI Uffl

gSMUDSACRAMENTO MUNICIPAL UTILITY DISTRICT

.

. , - -_ __

.

RANCHO SECO UNIT 1

TECHNICAL SPECIFICATIONS

Figure 3.5.2-12

LOCA Limited Maximum Allowable Linear Heat Rate

*21

20 ..

g 19

".

.; 18 i

*

SALANCE OF CYCLE

16

FIRST 50 EFPD-[* .

! '' /=E 14 ,'

.

13

|12

0 2 4 6 8 10 12

Axiat 1,0 cation of Peak Power f rom Bottom of Core, f t.

PROPOSEDONLY'

Nul VfT OFRCIAL

$SMUD.

SACRAMENTO MUNICIPAL UTILITY DISTRICT

._.

'.*

'

.

RANCHO SECO UNIT 1

TECHNICAL SPECIFICATIONS

Design Features

53 REACTOR

Spectflcation j

, . 3 .1 - Reactor Core

5 3 1.1 The reactor core contains approximately 93.1 metric tons of slightlyenriched uranium dioxide pellets. The pellets are encapsulated inzircaloy-4 tubing to form fuel rods. Thereactorcoreismadeup(o{(2)1

177 fuel assemblies. Each fuel assembly contains 208 fuel rods.

5 31.2 The reactor core shall approximate a right circular cylinder with anequivalent diameter of 128.9 inches and an active height of 144 inches.(2)

5.3 1.3 The average enrichment of the in I core for Rancho Seco is a ,

nominal 2.57 weight percent of U Three fuel enrichments areused in the' Initial core.

:5 3.1.4 _There are 61' full-length control rod assemblies (CRA) and 8 axialpower ' shaping rod assemblies -(APSRA)= distributed in the reactor coreas shown in. FSAR figure 3 2 ,45 The full-length CRA contain a 134inch length' of silver-indium-cadmium alloy clad with stainless steel .The APSRA contain a 36 inch (gngth of silver-indium-cadmium alloyclad with stainless steel.-

3.5.1.5 The initial core will have 68 burnable poison' assemblies with! similar. dimensions as the full-length control rods. The claddingwill be zircaloy-4 ' filled with aiuminum oxide-boron carbide pellets.and placed in the core as shown in FSAR figure 3.2-2.

5. 3.:1.6 -Reload fuel assemblies and rods shall conform to. design and eval-uation described in the FSAR. A reload -core may also have bu'rnable 76poison assemblies with dimensions similar to the full-length control

.

rods with materials as specified in 5 3 1.5

5.3.2? ' Reactor Coolant System

5;3.2.1 Thereactorcoolant'systemshallbegsignedandconstructedin, . _

accordance with code requirements'

5 3.2.2 The -reactor coolant system and any connected: auxiliary systems-exposed to the reactor coolant conditions of. temperature andpressure, shall be designed for. a pressure .of 2,500 psig and a

shall be designed forja. temperature of 670 F.bg urizer surge line: temperature of 650 F. The pressurizer and pre

5.3 2.3 .The reactor coolant: system volume shall be less than 12,200 cubic_

feet..

5-4rroposed'Aa,endment No. 76

,

_ . -_ _ _