ML081900169
| ML081900169 | |
| Person / Time | |
|---|---|
| Site: | Watts Bar  |
| Issue date: | 06/03/2008 |
| From: | NRC/RGN-II |
| To: | |
| References | |
| Download: ML081900169 (6) | |
See also: IR 05000390/2008301
Text
Final Submittal
(Blue Paper)
FINAL RO/SRO WRITTEN
EXAMINATION REFERENCES
AOI*30.2
FIRESAFESHUTDOWN
Rev. 27
Pace 17 of 1291
4.5
Safe Shutdown Logic Diagram
NOTES
(1) INInATING EVENT IS AN APP ENDIX R FIRE
(2) REFER TO SECTION 4.3 FOR A COMPLETE
DESCRIPTION OF THE SHum OWN KEYS. THEIR
FUNCTIONS AND COMPONENTS.
(3) LEGEND FOR DIAGRAM SYMBOLS AS FOLLOW S*
DESCRIPTION OF KEY
KEY NUMBER
I_~ ',"~M~' .~"'"
< 3' SAFETY FUNCTION OR E.ND
STATE TO BE ATTAINED
(4) OFFSITE POWER NOT CREDITED FOR ALTERNAW E SHUIDOW N.
(5) RCP THERMA L BARRIER COOLING REQUIRES SUPPORT OF
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Ba ttery Ce l l
Pa rameters
3 .8 .6
3 .8
ELECTRI CAL POWER SYSTEMS
3.8 .6
Ba tte r y Ce l l
Parameters
LCO
3. 8. 6
APPLICABILITY:
ACTI ONS
Batter y cell parameters
for
125 V vital batteries
a nd
12 5 V
diesel
ge ne r a tor
(DG)
b a t t eries shall be wi t hin
t he
l i mi ts
o f
Table
3 . 8 .6- 1 .
When associated
DC electrical p ower s ub s ys t e ms
and DGs are
required t o be OPERABLE .
-- - - - - - - ----------- - - - ----- - -- - - - ----NOTE- - - - - ---- - - - - - - - - - -- - - - - - - - - - - - ---- - -
Sep a r a t e
Cond i t i o n entry
i s all owed f or each battery bank.
A.
CONDI TIO N
One
o r
more
batteries wi t h one
o r
more batte r y
cel l parameter s
not
wi t h i n Ca t e go r y A
o r
B limits.
A.l
AND
A.2
AND
A. 3
REQUIRE D ACTION
Ve r i f y pilot cells
electrolyte leve l
and
fl oat vo l t a g e
mee t
Table 3. 8 .6-1
Category C limits .
Ve r i f y battery c el l
parameters meet
Table 3. 8 . 6-1
Category C limits.
Restore batter y c e l l
parameters to
Ca t e go ry A and B limit s
o f
Tabl e
3 . 8.6-1 .
COMPLETION TIME
I h our
2 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />
AND
Once per 7 days
t here after
31 days
(cont inued )
Wat t s
Ba r -Un i t
1
3. 8- 33
ACTIONS
(continued)
CONDITION
REQUIRED ACTION
Battery Cell Parameters
3.8 .6
COMPLETION TIME
B.
Required Action
and associated
Completi on Time of
Condition A not
met .
One o r
more
batteries with
average
electrolyte
temperature of the
representative
cells < 60°F for
vital batteries
and < 50°F for
batteries.
One o r
more
batteries with one
o r
more battery
cell parameters
not within
Category C values.
B.1
Declare associated
battery inoperable.
Immediately
SURVEILLANCE REQUIREMENTS
SURVEILLANCE
FREQUENCY
SR
3 .8 . 6 . 1
Watt s Bar-Unit
1
Verify battery cell parameters meet
Table 3 .8 .6-1 Category A limits .
3 .8-34
7 days
(cont i nue d )
SURVEILLANCE REQUIREMENTS
(cont inue d )
SURVEI LLANCE
Battery Cel l
Pa r ame t e rs
3 .8 . 6
FREQUENCY
SR
3 .8 . 6.2
SR
3 . 8 . 6 . 3
Watt s
Bar- Uni t
1
Ve r i fy battery ce l l parameters meet
Table
3 . 8 .6 - 1 Ca t ego ry B limits .
Verify average electrolyte temperatu re
o f representative cells is
~ 60°F
f or
vital batteries and
~ 50°F for the
batteries .
3 .8-3 5
92 da ys
AND
Once within
24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> after a
batt e r y
dis charge
< 11 0 V for
v i t a l batterie s
(113.5 V f or
vital battery V)
or 106 .5 V f or
DG batteries
AND
Once within
24 hou r s after a
battery
overcharge
> 150 V f or
v i t a l batter i es
(155 V f or vi t a l
battery V)
o r
145 V f or DG
batteries
92 days
Battery Cell Parameters
3 .8 .6
Table 3 .8 .6- 1
(page
1 o f
1)
Battery Cell Paramete rs Requ irements
CATEGORY A:
CATEGORY B:
CATEGORY C:
PARAMETER
LI MITS FOR EACH
LIMITS
FOR EACH
ALLOWABLE LIMIT
DES IGNATED PILOT
CONNECTED CELL
FOR EACH
CELL
CONNECTED CELL
Electrolyte Level
> Min i mum level
> Minimum level
Above top of
i nd i ca t i o n mark ,
indicat ion mark ,
plates,
a nd not
and
$
1 / 4 i nc h
and
~ 1 /4
i nc h
over f l owi ng
ab ove maximum
above ma x i mum
leve l
indicat ion
level indication
mark (a )
ma r k (a )
Floa t
Vol t age
~ 2 . 13
V
~ 2 . 13 V
> 2 . 07 V
Specific Gr avi ty
~ 1. 200
~ 1.195
Not mo r e than
(b ) ( c)
0 .020 bel ow
AND
a vera ge of all
- -
c onnected cell s
Average o f all
connected cells
AND
1.205
--
>
Average o f
a ll
c o nne c t e d cells
~ 1 .1 95
(a )
I t
is acceptable
f or the electrolyte level
t o t empo r a r i l y increase above
the specified maximum level during equal i zing charges provided i t
i s
no t
overflowing.
(b)
Co rrected f or electrolyte t e mpe r a t ur e and level .
Level cor r ect ion is
not
r equi red ,
however ,
when ba tte r y c ha r g i ng
i s
< 2 amps
whe n o n float
charge f or vital batteries and < 1 . 0 amp
f or
DG batteries.
(c l
A battery c ha r g i ng curren t
o f
< 2 amps
whe n on
f l oat charge
f o r
v i t a l
batteries and < 1 . 0 amp
f o r
DG b a tte r i e s is acceptable f o r meeting
specific gravity limi ts fo llowing a battery recharge ,
f or a maximum o f
31 days .
When charging current is
us e d t o satis fy s pe c i f ic gravit y
requ irement s ,
speci f ic g ravity of each conne c t e d cel l
s ha l l
be mea s ured
p r i or t o e xpi ration o f the
31 day a l l owa nce .
Wa t t s Bar-Unit 1
3 . 8- 36
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