ML19332E890
| ML19332E890 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 12/04/1989 |
| From: | PUBLIC SERVICE CO. OF COLORADO |
| To: | |
| Shared Package | |
| ML19332E881 | List: |
| References | |
| NUDOCS 8912130110 | |
| Download: ML19332E890 (6) | |
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Fort St. Vrain #1-S Technical Specifications'-
Amen.dment No.
P, Page 3/4 1-24 t
-l SPECIFICATION SR 4.1.4 (Continued) f
' l' c.
The CORE AVERAGE TEMPERATURE is' equal to 80 l.
degrees F, and l
d.
Full decay of Xe-135, full buildup of Sm-149, l-and Pa-233 decay as a function of time after F
l
-shutdown.
l.
C.
When in REFUELING:
l
= 1.,
Prior to control rod pair withdrawal, if all control l
rod pairs:are not. fully inserted into fueled regions l'
prior to withdrawal action, and L' i
. l-2.
Prior -to the removal of the control rod pair in a l
region to be refueled or repaired.
l' 3.
In assessing the SHUTDOWN MARGIN the following
-l conditions shall be assumed:
P
-l
- a. ;The highest worth control rod pair capable of
^
l-l being withdrawn is fully withdrawn, I
l b.
Control rod pairs.
being withdrawn for.
p l-refueling / repair, SHUTDOWN MARGIN assessment, or E
l OPERABILITY test purposes, are fully withdrawn, I
- c. -All other OPERABLE control rod pairs are fully I
inserted into fueled regions and incapable of l
being withdrawn, l
d.
Inoperable control rod pairs are in their known
'l position or fully withdrawn, l-e.
For planned CORE ALTERATIONS, the core shall be l
in its most reactive configuration, 1
g----,
Fort St. Vrain'#1:
.c
' Technical Specifications-Amendment'No.
Page 3/4 1-28 3:
l' BASIS FOR SPECIFICATION LCO 3.1.4/SR 4.1.4 (Continued)___.
l The ACTION statement-of LCO 3.1.6, Control Rod Pair Position.
l
. Requirements-Shutdown, requires completion of.the assessment of
~
l the SHUTDOWN MARGIN within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.
l Within the-first 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> after. shutdown, the SHUTDOWN MARGIN is-3 l
significantly' larger:.than specified.due-to higher-core
<l temperatures and the presence of Xe-135 and Pa-233. A 12 hour1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> L
l delay ~ will not compromise the validity of this specification..
F l
, Assessment-of.the SHUTDOWN MARGIN prior to any' control rod pair l
withdrawal, if all control rod pairs are not fully inserted.
l prior to withdrawal to achieve. criticality, and prior to removal l
of a control. rod pair for refueling / repair, ensures that the l
requirements of-this specification will be met during these l
ACTIONS.
1 l
I e
r
-g_.
o
g Fort St. Vrain #1
^
T;chnical Specificattns Amendment'No.
Page 3/4 1-34
-l REACTIVITY CONTROL l 3/4.I.6 CONTROL ROD PAIR POSITION REQUIREMENTS - SHUTDOWN.
j l LIMITING CONDITION FOR OPERATION i
l 3.1.6 All ' control rod pairs in fueled regions shall be fully l
inserted and incapable of being withdrawn _except:*
r,.
l
.1.
Up to two control rod pairs may be removed from fueled l
regions, and I
l-
-2.
Additional control rod pairs may be withdrawn for
[
l SHUTDOWN MARGIN assessment or OPERABILITY tests.
.l APPLICABILITY: SHUTDOWN AND REFUELING l ACTION:
l A.
Within I hour af ter each reactor shutdown, if more tfian 10
'l two control rod pairs are-_not verified to be fully l
_ inserted, either:
l 1.
Insert-et least all but two control rod pairs to the p
l fully inserted position, or u
l 2.
Insert reserve shutdown material in at least those l
regions where control rod pairs are not verified to l
be fully inserted, beyond the allowable two.
1 l
B.
Subsequent to I hour after: reactor shutdown, with less-y l
than the_above requirements:
i
- l' 1.
Immediately suspend all operations involving CORE l
l ALTERATIONS, control rod pair movements resulting in 1
l positive reactivity changes or movement of l
IRRADIATED FUEL.
i I
,.e l*
The SHUTOOWN MARGIN requirements of LCO 3,1.4 (for SHUTDOWN and l
REFUELING) shall.be maintained for all these control rod pair l
configurations.
a
Fort St. Vrain #1 Technical Specificati:ns Amend:ent No.
Page 3/4 1-39 l BASIS FOR SPECIFICATION LCO 3.1.6/SR 4.1.6 (Continued)______.
l Demonstrating that a SHUTDOWN MARGIN of greater than or equal to 0.01 l delta k exists prior to removing more than one control rod drive l assembly from fueled regions ensures that criticality will not occur l and the SHUTDOWN MARGIN requirements will be maintained after the l control rod pair is removed,
Fort St. Vrain #1
~
Technical $pecifications Amendment No.
Page 3/4 1-47 l REACTIVITY CONTROL l 3/4.1.9 RESERVE SHUTDOWN SYSTEM - SHUTDOWN l LIMITING CONDITION FOR OPERATION _ _,
l 3.1.9 Reserve shutdown (RSD) units in control rod drive assemblies l
for which control rod pairs are capable of being withdrawn l
from fueled regions shall be OPERABLE (except RSD units in l
any control rod drive assemblies removed for l
refueling / repair) with:
l A.
At least 1500 psig pressure in their individual helium l
gas bottle supplies, and l
B.
At least 500 psig pressure in the Alternate Cooling l
Method (ACM) nitrogen bottles which provide a backup l
means of actuating the RSD hopper pressurization valves.
l APPLICABILITY:
SHUTDOWN and REFUELING l/fi10N: With Irss then the abeve required RSD units OPERABLE, within j.'
l 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> either:
l l
A.
Return all control rod pairs in fueled regions (except l
the ones removed for refueling / repair) to the fully l
19serted casition, or 1
8.
Ensure SHUTDOWN MARGIN requirements are met (LC0 3.1.4),
l or l
C.
Intert sufficient RSD material to maintain SHUTDOWN l
MARGIN requirements.
L