ML20086D534
| ML20086D534 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 06/27/1995 |
| From: | OMAHA PUBLIC POWER DISTRICT |
| To: | |
| Shared Package | |
| ML20086D354 | List: |
| References | |
| NUDOCS 9507100230 | |
| Download: ML20086D534 (28) | |
Text
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l TECHNICAL SPECIFICATIONS - FIGURES I
TARLF OF CONTENTS PAGE WHICH FIGURE DESCRIPTION HGURE YOLLOWS l
11 TMLP Safety Limits 4 Pump Operations.............................. 1 3 1-2 Axial Power Distribution LSSS for 4 Pump Operations..................... 13 2-1A RCS Pressure-Temperature Limits for Hestup........................... 2-6 l
2-1B RCS Pressure-Te+we Limits for Cooldown......................... 2-6 2-3 Predicted F adiation Induced NDIT Shift............................. 2-6 2~19i 2-11 MIN BAST Level vs Stored BAST Concentration........................ e 2-19i i
A-19--
2 12 Boric Acid Solubility in Water
}
2-10 Spent Fuel Pool Region 2 Storage Criteria............................ 2-38 2-8 Flux Peaking Augmentation Factors................................ 2 53
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l 9507100230 950627 A =a - t No.,.,,.,.,.,.,.,,..,. 2,. 4 61 vut PDR ADOCK 05000285 P
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2.0 fMITTNG CONDITTONS F0k G NWATTON 4
\\
2.2 Chemical and Volume conttel Svstem Anni bility l
Applies o the operational status of the chemical and volume entrol system.
f Obiective I
To define the conditions of the chemical and volume co' I system j
necessary to safe reactor operation.
1 Snecifications j
t l
(1)
When fuel is i the reactor and the reactor i suberitical, there l
i shall be at 1 one flow path to the core or borie dd in,fection.
This flow path be from the SIRW tank, th at least 10,000 gals.
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available at refue ng baron concentrati or from a BAST which meets the requi.
of Figure 2-11 f a SIRW tank boren concentration at the ical speciff tion limit.
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(2)
The reactor shall not be criti unless all the.following min'imum f
requirements are met i
i a.
At least two charging p shall be operable.
j b.
One boric acid transfer shall be operable.
i c.
The minimum volume of ora water contained in the boric acid i
storage tank (s) (
is d on the BAST and SIRW tank l
boron concentratic The mini required volume curve is
[
i shown in Figure 2-1.
Depending n the flow paths available,-
J j
this volume of b tad water can either the combined volume j
i of the two BAST, or can be contain in a specific EAST. The l
l
' BAST.is defi as the tank, gravity eed valve, pump and l
?
associated p' ing. The ambient tempe ture of the boric acid l
tank soluti CH-11A and CH-11B shall t the temperature j
l
[
requiremen of Figure 2-12.
l d.
System ping and valves shall be operable ch that one of the fall four conditions will be satisfied.
If piping or 1
valv become inoperable and a condition chang is required, six (6) ours are allowed when changing from one c ition listed l
be to another condition listed below.
In the vent that the l
ition change cannot be completed within the s1 (6) hours l
2 l
lowed. the unit shall be placea in at least HOT l
within six (6) hours, in at least suocritical and <3
'F within l
the next six (6) hours and in at least COLD SHUTDOWN
' thin the l
following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br /> unless corrective measures are compi ted.
l 4
j 2-17 Amenoment No. 131 i
L-
-.-.,-.. - - -.~. - - -
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j 3MTTTNG CONDTTTONS FOR OPEttATTON 2.
l 2.2 Chsud and Volume Contmf System (nmemteri) i dl.
He reemreri BAST volume of Figure 2-11 can be comninen h e
11A ami G-11B wnen both tanzs and LCV-218-3 are opendde.
l d2.
When i.CV-218-3 is im ;r hie or the SIEW tank vahnne beinw Technical S. 2-. 4- - 2.2(1) h then each mas bc i
Mala ami comam the awad vainme af Egure 2 r 4
___ =
to the
,.l. -...-..- of the SIEW tank Technical S;+ DJ oma l
b j
f l
d3.
BAST G-11B is I"-f=e h1a, then BAST G-umabee i
j and\\
- the, wad volume of Egms 2-11 I.cy.218-3 n'en be yr:=5 i
d4.
When G-IIAisIn-g-J h'=, then G-11B nmstbe--- :a
=
and c= nam myua volume of
-11 and LCV-218-3innst be l
W '*
f f
e.
I.2 Vel inauw on inservice BAST be om mMe i
MadiMim of M'd== Rowa" N j
(3) i During power opp. etiren the...*...~........ g N 2nay be mnrHGA to aljoW M CEE of the followmg connitions to exist at time. If the sysium is not renared to meet the l..l........ -w within the '
5;+ V the reacun shan be M i
l in the hot shutddwn candMem in 4 in the cold shutdown ennriMrm wakin an eda *asi 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />.
l i
'One of the opemble -
pmuns znay removed from service pu,M two l
a.
' la within 24 h 6W p=:ms are l
b.
Both boric a::id p
, may be out of service 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> provided that both I
j BASTS meet the c.waw of Figure 2-11.
l i
trz: Amei en each inservice *=
" -d boric acid tarimay c.
Onelevel4 l
be out of
'ce icz 24 aoms.
may be removed from service for 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> ruv ' that either of the I
d.
One
= of 2.2(2)d3 or 2.2(2)d4 above is met.
j
=adi f
l B3bl and vohnne comrol system provides ci of the reacror ennine y baron l
- Ihe 9-mi This is norrnady a >
, hi by using any one of the three hkpin one of the two boric acid currms. An attem'a edad of bc - ;= wiH be p dm j
imummy series v,'
g pamns cfirecdy from the SIEW wosgs tank. A third me2had will 4
l and the safety injec==n numns.
l is '= Juwd three m!rm=r carns.
Mnenamem No. 42,:22, 2-18 I
m
--....mm---
-r, m...-.-
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,+,--...--,.-.-r v-.%..+.,-,w-e------,
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,,-~..,,---.---,,,,,,w
,-g---
r----w,-,--*w---a,,,u-=r
--we-
2.$ LIMITING CONDITIONS FOR OPERATION 2.2\\ Chemical and Volume Control System (Continued)
(
(1) The boric acid pumps can deliver the BAST contents (2.5-4.5 weight ercent concentration of boric acid) to the charging pumps.
The anks e located above the charging pumps so that the boric acid wil flow b
ravity without being pumped.
(2) The fety injection pumps can take suction from the SIRW t k which mainta ns a boric acid concentration greater than the req red refueli concentration.
(3) The charg g pumps can take their suctions by gravity rom either the boric acid nks or the SIRW tank.
Each concentrated ric acid tank containing 2.5-4.5 w ght percent boric acid has sufficient oron to bring the plant to a col shutdown condition.
Boric acid pumps are ch of sufficient capacity to eed all three charging l pumps at their maximum apacity.
l The concentrated boric ac storage tank is siz for 2.5-4.5 weight percent!
boric acid solution and is apable of storing lution up to 4.5 weight percent solution. All compo ents of the sys m are capable of maintaining 4.5 weight percent solution.
he elevation f the concentrated boric acid tank is sufficiently above the harging p p suction so as to provide adequate gravity flow to the cha ing pu s.
Figure 2-12 contains a 10*F bias t a ount for temperature measurement uncertainty. An administrative pro ure to monitor the temperature of the,
I BASTS and boric acid system piping the Auxiliary Building ensures that l
t the temperature requirements of F ure -12 are met.
Should the system I
temperature be unacceptable for erati at the current boric acid concentration, immediate steps ill be ta en to reduce the boric acid concentration or raise the te erature of e system such that the concentration is within the cceptable rang of Figure 2-12.
The SIRW tank contents ar sufficient to borat the reactor coolant in order i
to reach cold shutdown any time during core fe.
l The limits on compone operability and the time p *iods for inoperability were selected on th asis of the redundancy indica'. d above and engineering judgment.
j References (1) USAR, S tion 9.2 l
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endment No.131 2-19
.--.._._.~ _ _, _,_
2.0 LIMITING CONDITIONS FOR OPERATION 2.2 Chemical and Volume Control System 2.2.1 Boric Acid Flow Paths - Shutdown Applicability Applies to the operational status of the boric acid flow paths in MODES 4 and 5 when fuel is in the reactor.
Objective To assure operability of equipment required to add negative reactivity.
Specification As a minimum, one of the following boric acid flow paths from an OPERABLE borated water source shall be OPERABLE:
A flow path from boric acid storage tank CH-il A via either a boric acid J
a.
transfer pump or a gravity feed connection and a charging pump to the Reactor Coolant System.
b.
A flow path from boric acid storage tank CH-11B via either a boric acid transfer pump or a gravity feed connection and a charging pump to the Reactor Coolant System.
c.
A flow path from both boric acid storage tanks (CH-il A and CH-llB) via either a boric acid transfer pump or gravity feed connection and a charging pump to the Reactor Coolant System.
d.
A flow path from the SIRW tank via either a charging pump or a high pressure safety injection pump to the Reactor Coolant System.
Reauired Actions (1)
With none of the above boric acid flow paths OPERABLE, suspend all operations involving CORE ALTERATIONS or positive reactivity changes.
2-17 Amendment No.4M,
~. -
.... - =
L l.
2.0 LIMITING CONDITIONS FOR OPERATION 2.2 Chemical and Volume Control System (Continued) l' 2.2.2 Boric Acid Flow Paths - Operating i
Apolicability 1
Applies to the operational status of the boric acid flow paths whenever the reactor coolant temperature (T u) is greater than or equal to 210 F.
eo Obiective l-To assure operability of equipment required to add negative reactivity.
Specification At least two of the following boric acid How paths from OPERABLE borated water sources shall be OPERABLE :
A flow path from boric acid storage tank CH-ll A, via either a boric acid a.
transfer pump or a gravity feed connection and a charging pump to the Reactor Coolant System.
l b.
A flow path from boric acid storage tank CH-llB, via either a boric acid.
trcnsfer pump or a gravity feed connection and a charging pump to the Reactor Cooiant System.
A flow path from both boric acid storage tanks (CH-ll A and CH-llB) via c.
either a boric acid transfer pump or gravity feed connection and a charging pump to the Reactor Coolant System.
d.
A flow path from the SIRW tank via a charging pump to the Reactor Coolant System.
Reauired Actions (1)
With only one of the above required boric acid flow paths to the Reactor Coolant System OPERABLE, restore to at least two OPERABLE boric acid flow paths to the Reactor Coolant System within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.
(2)
With the required actions of (1) not met, or with none of the above required boric acid flow paths to the Reactor Coolant System OPERABLE, be in at least HOT SHUTDOWN within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, in at least suberitical and < 300aF within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, and in at least COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
2-18 Amendment No. 43,103,131,157,
l 2.0 LIMITING CONDITIONS FOR OPERATION 2.2 Chemical and Volume Control System (Continued) 2.2.3 Charging Pumos - Shutdown Applicability Applies to the operational status of charging pumps in MODES 4 and 5 when fuel is in the reactor.
Objective To assure operability of equipment required to add negative reactivity.
Specification At least one charging pump or one high pressure safety injection pump in the boric acid flow path required to be OPERABLE pursuant to Specification 2.2.1 shall be OPERABLE.
Required Actions (1)
With no charging pump or high pressure safety injection pump OPERABLE, suspend all operations involving CORE ALTERATIONS or positive reactivity
- changes, i
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I 2-19 Amendment No. 4&h
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- 2.0 LIMITING CONDITIONS FOR OPERATION l
2.2 Chec ical and Volume Control System (Continued) l 2.2.4 Charging Pumps - Ooerating l
l Applicability l
I Applies to the operational status of charging pumps whenever the reactor coolant j
temperature (T a) is greater than or equal to 210 F.
m I
f.
Obiective I
To assure operability of equipment required to add negative reactivity.
Specification At least two charging pumps shall be OPERABLE.
Reauired Actions (1)
With only one charging pump OPERABLE, restore to at least two OPERABLE charging pumps within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.
(2)
With the required actions of (1) not met, or with no charging pumps OPERABLE, be in at least HOT SHUTDOWN within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, in at least subcritical and <300 F within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, and in at least COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
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l 2-19a Amendment No.
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,......._..,__,,m...
,.,..~,..-,-,.m.
,,._,..,-,,,..,_..-....-.,,-,----_,.,.v.-_
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l 2.0 LIMITING CONDITIONS FOR OPERATION 2.2 Chemical and Volume Control System (Continued) 2.2.5 Boric Acid Transfer Pumos - Shutdown Aeolicability Applies to the operational status of the boric acid transfer pumps in MODES 4 and 5 when fuel is in the reactor.
1 Obiec'tive To assure operability of equipment required to add negative reactivity.
l Soecification At least one boric acid transfer pump shall be OPERABLE if the flow path through the boric acid transfer pump in Specification 2.2.1 is OPERABLE.
Required Actions (1)
With no boric acid transfer pump OPERABLE as required to complete the flow path of Specification 2.2.1, suspend all operations involving CORE ALTERATIONS or positive reactivity changes.
2-19b Amendment No.
y
,w re--n,,
,m e-
,--.7r,,--
asw,,,
-,,,,w w w-.
crw
,-r,-.
.-r
,e,-
,-e..
. -+
i 2.0 LIMITING CONDITIONS FOR OPERATION 2.2 Chemical and Volume Control System (Continued) 2.2,6 Boric Acid Transfer Pumps - Operating Applicability Applies to the operational status of the boric acid transfer pumps whenever the reactor coolant temperature (T y is greater than or equal to 210"F.
Obiective To assure operability of equipment required to add negative reactivity.
Specification At least the boric acid transfer pump (s) in the boric acid flow path (s) required to be OPERABLE pursuant to Specification 2.2.2 shall be OPERABLE if the flow path (s) through the boric acid transfer pump (s) in Specification 2.2.2 is OPERABLE.
Reauired Actions (1)
With one boric acid transfer pump required to be OPERABLE to complete one j
of the two boric acid flow paths of Specification 2.2.2 inoperable, restore the boric acid transfer pump to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.
(2)
With the required actions of (1) not met, or with two boric acid transfer pumps required to be OPERABLE to complete both of the boric acid flow paths of Specification 2.2.2 inoperable, be in at least HOT SHUTDOWN within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, in at least subcritical and <300 F within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, and in at least COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
2-19c Amendment No.
[
2.0 LIMITING CONDITIONS FOR OPERATION 2.2 Chemical and Volume Control System (Continued) 2.2.7 Borated Water Source - Shutdown Applicability Applies to the operational status of borated water sources in MODES 4 and 5 when fuel is in the reactor.
Obiective To assure operability of equipment required to add negative reactivity.
Soecification As a minimum, one of the following borated water sources shall be OPERABLE:
a.
Boric acid storage tank CH-ll A with the contents of the tank in accordance with Figure 2-11 for a SIRW tank boron concentration at REFUELING BORON CONCENTRATION, and with the ambient temperature of the boric acid solution greater than or equal to the solubility temperature of Figure 2-12.
b.
Boric acid storage tank CH-1IB with the contents of the tank in accordance with Figure 2-11 for a SIRW tank boron concentration at REFUELING BORON CONCENTRATION, and with the ambient temperature of the boric acid solution greater than or equal to the solubility temperature of Figure 2-12.
c.
Both boric acid storage tanks CH-11 A and CH-1IB with the combined contents of both tanks in accordance with Figure 2-11 for a SIRW tank boron concentration at REFUELING BORON CONCENTRATION, and with the ambient temperature of the boric acid solution greater than or equal to the solubility temperature of Figure 2-12.
d.
The SIRW tank with:
1.
A minimum useable borated water volume of 10,000 gallons, 2.
A minimum boron concentration of REFUELING BORON CONCENTRATION, and 3.
A minimum solution temperature of 50 *F.
1 1
2-19d Amendment No.
l 2.0 LIMITING CONDITIONS FOR OPERATION 2.2 Chemical and Volume Control System (Continued) 2.2.7 Borated Water Source - Shutdown (Continued)
Reauired Actions (1)
With no borated water source OPERABLE, suspend all operations involving l
CORE ALTERATIONS or positive reactivity changes.
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2-19e Amendment No, i
. ~.. _,,, -. _., _, _, _, _.... - - -
1 I
l 2.0 LIMITING CONDITIONS FOR OPERATION 2.2 Chemical and Volume Control System (Continued) 2.2.8 Borated Water Sources - Operating l
Applicability Applies to the operational status of borated water sources whenever the reactor coolant temperature (TJ is greater than or equal to 210 F.
Obiective To assure operability of equipment required to add negative reactivity.
Specification Both of the following borated water sources shall be OPERABLE:
a.
At least one boric acid storage tank (CH-il A or CH-IIB) with the contents of the tank in accordance with Figure 2-11, or both boric acid storage tanks (CH-II A and CH-llB) with the combined contents of both tanks in accordance with Figure 2-11, and with the ambient temperature of the boric acid solution greater than or equal to the solubility temperature of Figure 2-12.
b.
The SIRW tank with:
1.
A minimum useable borated water volume of 25,000 gallons, 2.
A minimum boron concentration of REFUELING BOPON CONCENTRATION, and 3.
A minimum solution temperature of 50 F.
Required Actions (1)
With the above required boric acid storage tank (s) inoperable, restore the tank (s) to OPERABLE status witilin 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.
(2)
With the SIRW tank inoperable, be in at least HOT SHUTDOWN within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, in at least subcritical and <300 F within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, and in at least COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
(3)
With the required actions of (1) not met, or with no OPERABLE borated water source, be in at least HOT SHUTDOWN within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, in at least subcritical and <300 F within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, and in at least COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
2-19f Amendment No.
2.0 LIMITING CONDITIONS FOR OPERATION 2.2 Chunical and Volume Control System (Continued)
Basis The chemical and volume control system provides control of the reactor coolant system boren inventory.* This is normally accomplished by using any one of the three charging pumps in series with one of the two boric acid pumps. An alternate method of boration is to use the charging pumps directly from the SIRW tank. A third method is to depressurize and use the safety injection pumps.
Borated water sources There are three sources of borated water available, boric acid storage tank CH-ll A, boric acid storage tank CH-11B, and the SIRW tank. An additional source that is allowed is to have the required volume combined between CH-11 A and CH-1IB. Each boric acid source has sufficient boron to bring the plant to a cold shutdown condition.
Whenever the reactor coolant temperature (T ) is greater than or equal to 210 F, two borated water sources must be operable in order to ensure sufficient capacity in conjunction with an assumed single failure. For a borated water source to be considered operable, tank volume, baron concentration, and temperature of the contained boric acid solution must be within their respective requirements.
In Modes 4 and 5 when fuel is in the reactor, only one of these sources must be operable.
One source is acceptable during these modes without consideration of a single failure on the basis of the stable reactivity condition of the reactor and the additional restrictions prohibiting core alterations and positive reactivity changes in the event the single source becomes inoperable. If no sources are operable, restore at least one source to operable status.
Boric acid flow paths i
Consistent with the requirement to maintain two borated water sources operable when the RCS temperature is greater than or equal to 210 F, a minimum of two boric acid flow paths from operable borated water sources must also be operable. For a flow path to be considered operable, boric acid must be capable of being transported from the operable borated water source to the reactor coolant system. Consistent with the requirements for borated water sources, 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> is allowed to restore the system to two operable flow paths, i
l 2-19g Amendment No.
Y
2.0 LIMITING CONDITIONS FOR OPERATION 2.2 Chemical and Volume Control System (Continued)
Basis (Continued)
The flow paths available depend on which sources of borated water are operable. A flow path from a boric acid storage tank may be through the gravity feed connection or a boric acid transfer pump. When one of the operable sources is the combined contents of both boric acid storage tanks, then the flow path from this source requires that a flow path from each tank to the RCS be operable. This flow path can be established by using various combinations of gravity feed connections and/or boric acid transfer pumps. Both tanks could also be aligned to a single boric acid transfer pump since the specification requires, when using this flow path, that a flow path from the SIRW tank be operable. Therefore, single j
failure criteria is met by maintaining the additional flew path from the SIRW tank.
In Modes 4 and 5 when fuel is in the reactor, only one flow path must be operable. One flow path is acceptable during these modes without consideration of a single failure on the basis of the stable reactivity condition of the reactor and the additional restrictions prohibiting core alterations and positive reactivity changes in the event the single flow path becomes inoperable. If no flow path is operable, restore at least one flow path to operable status.
Boric Acid Transfer Pumps Boric acid transfer pumps need only be operable if required to complete an operable boric acid flow path.
Whenever the reactor coolant temperature (Ta) is greater than or equal to 210 F, two flow paths from operable borated water sources are required to be operable. The flow path from an operable boric acid storage tank may be through the gravity feed connection or a boric acid transfer pump. If the gravity feed connection from the operable boric acid storage tank is inoperable, then a boric acid transfer pump must be operable in order to complete an operable flow path. The specification allows 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> to restore one boric acid transfer pump if it is required to complete a flow path. In this situation, the one inoperable pump renders one required flow path inoperable. The specification requires a plant shutdown if two boric acid transfer pumps are inoperable that are required to complete two flow paths.
In this situation, the inoperable pumps render both required flow pat';s inoperable.
In Modes 4 and 5 when fuel is in the reactor, only one flow path must be operable. This is consistent with the number of operable borated water sources required during these modes. If the gravity feed connection from the operable boric acid storage tank is inoperable, then a boric acid transfer pump must be operable in order to complete an operable flow path.
Boric acid transfer pumps are each of sufficient capacity to feed all three charging pumps at their maximum capacity.
2-19h Amendment No.
l l
2.0 LIMITING CONDITIONS FOR OPERATION l
2.2 Chemical and Volume Control System (Continued) l Basis (Continued)
Charging Pumps
. Whenever the reactor coolant temperature (T u) is greater than or equal to 210 F, two eo charging pumps must be operable in order to ensure it is possible to inject concentrated boric acid into the reactor coolant system with an assumed single failure. With only one pump operable, 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> is allowed to restore the system to two operable charging pumps. This is i
l consistent with the allowed outage time for the borated water sources and flow paths required j
during these modes.
L
[
In Modes 4 and 5 when fuel is in the reactor, only one charging pump or high pressure i
safety' injection pump must be operable. This is consistent with the number of operable l
borated water sources and flow paths required during these modes. A pump is required in l
order to complete an operable flow path to the reactor coolant system. There are additional restrictions on the use of high pressure safety injection pumps contained in Technical Specification 2.3 to ensure that the reactor vessel is not overpressurized.
Figure 2-12 contains a 10 F bias to account for temperature measurement uncertainty. An administrative procedure to monitor the temperature of the BASTS and boric acid system piping in the Auxiliary Building ensures that the temperature requirements of Figure 2-12 are met. Should the system temperature be unacceptable for operation at the current boric acid concentration, steps will be taken to reduce the boric acid concentration or raise the temperature of the system such that the concentration is within the acceptable range of Figure 2-12.
The limits on component operability and the time periods for inoperability were selected on the basis of the redundancy indicated above and NUREG-0212 Revision 2. The allowed i
outage times for the various components are consistent such that a support system has the same allowed outage time as the supported system.
Referencss (1) USAR Section 9.2 l
i-2-19i Amendment No.
l L
TABLE 3-2 (Continued)
MINIMUM FREOUENCIES FOR CHECKS. CALIBRATIONS AND TESTING OF ENGINEERED SAFETY FEATURES. INSTRUMENTATION AND CONI'ROLS Channel Description Surveillance Function Frecuency Surveillance Method 14.
(continued) b.
Calibrate R
b.
Known pressure and differential pressure applied to pressure and level sensorg __ __leveI is knYin.
C n b..ts.
ecif +hg mi Cr c ; y;. !
15.
Doric Acid Tank Level a.
Check
-D-W a.
p..._,...L de, i... :- :.i.-
i.
e.
o i.
e
., :..m,,.; r,.,...,:. i...- :-
c: '%
o c.
v-
-mrt== :,.._.. ;,.,.n a
,,, i,,i m.,
i, i..
~.: _.. :. : _a:--._..._ __..:,, u I:--ay-[.:a[-'[r_,__[._
D
'- - ( e-s!--- -W-n p,
Verifg -thof t mperAThre es soaNo bb-t 16.
Bon. Ac. Tank Tem r-m.
Check
-B-- W
-C' x.-z: :mp n::::: & ;S_- !=
i a.
atu ' '::::!-
m.,,_,-..
- x___,
x __
17.
Steam Generator Low a.
Check S
a.
Compare four independent pressure Pressure Signal (SGLS) indications.
h.
Test Q
b.
Simulated signal.
l c.
Calibrate R
c.
Known pressure applied to sensors to verify trip points, logic operation, block permissive, auto reset and valve closures.
3-11 Og #;. 7 R/A;/-7y_
Amendment No. 434R-
_ _ = = _ _ _ _ _ _ _
. - - _._.~. _ -. --.. _._._ - - -
1 TABLE 3-2 (Continued)
MINIMUM FREOUENCIES FOR CHECKS. CALIBRATIONS AND TESTING OF ENGINEERED SAFETY FEATURES. INSTRUMENTATION AND CONTROLS I
Channel Descrintion SurveiBance Function Fremmency L.. '" = " ' ' ' '
Verif- - - ~ - -
re i s w eb. ims. 5, D(6)
C:-;-- y th# -rempero 18.
IRW Tank Temperature a.
Check a.
- a ;:- "
1_, ;.
h.
Test Q
h.
Measure temperature of SIRW tank l
with standard laboratory instru-nients.
1 19.
Recirculation Actuation s.
Test R
a.
Manual initiation.
l Switches 20.
Recirculation Actuation a.
Test Q
a.
Part of test 3(a) using built-in testing l
Logic systents to initiate STLS.
l h.
Test R
b.
Cosnplete auteenetic test initiated i
sensor operation.
I 21.
4.16 KV Emergency Bus a.
Check S
a.
Verify voltage readings are above l
Low Voltage (Loss of alarm initiation on degraded voltage j
Voltage and Degraded level - supervisory lights 'on".
Voltage) h.
Test Q
b.
U.i +:!":;: relay operation sinus-g lated one circuit at a tinsa.
3 i
c.
Calibrate R
c.
Known voltage applied to sensors and circuit breaker trip actuation logie verified.
4 3-12 Amendment No. 44,443d63-i
TABLE 3-2 (Continued)
SilNikfUht FREOUENCIES FOR CIIECKS. CALIBRATIONS AND TESTING OF ENGINEERED SAFETY FEATURES. INSTRUMENTATION AND CONTROLS Channel Description Surveillance Function Freauencv, Surveillance Method 22.
Check S
a.
Compare independent level readmgs.
Water Level Low (Wide Range) h.
Calihiate R
h.
Known signal applied to sensor.
l h.
Check S
a.
Compare independent pressure readmgs.
Pressure Low h.
Calibrate R
h.
Known signal applied to sensor.
l c.
Calibrate R
a.
Known signal applied to sensor.
Differential Pressure liigh a.
Test Q
a.
Functional check of initiation circuits.
l d.
Actuation Circuitry h.
Test P
h.
System functional test of AFW initiation circuits.
NOTES: (1)
Not required unless pressurizer pressure is above 1700 psia.
(2)
CRilS monitors are the containment atmosphere gaseous radiation monitor and the Auxiliary Building Exhaust Stack gaseous radiation monitor.
(3)
Not required unless steam generator pressure is above 600 psia.
(4)
QP - Quarterly during designated modes and prior to taking the reactor critical if not completed within the previous 92 days (not applicable _
l to a fag trip recovery).
30 F W (6) MaY EC 9 t>i red w e ou 3-12a Amdment No 51,55,122,-M3-le SS +han loS*F.
ky-J
TABLE 3-4 (Cottinued) l MINIMUM REOUENCIES FOR SAMPLING TESTS l
Type of Measurtsnent Sample and Analysis and Analysis Freauencies 1
1.
Reactor Coolant (Continued)
(c) Cold Shutdown (1) Chloride i per 3 days (Operating Mode 4) m (d) Refueling Shutdown (1) Chloride 1 per 3 days j
(Operating Mode 5)
(2) Boron Concentration i per 3 days
- i (e) Refueling Operation (1) Chloride 1 per 3 days *
(2) Boron Concentration 1 per shift
- i 2.
SIRW Tank Boron Concentration-1 per 31 da s l
3.
Concentrated Boric Boron Concentration 1 perJf days Acid Tanks 4.
Si Tanks Boron Concentration i per 31 days 5.
Spent Fuel Pool Boron Concentration I per 31 days 6.
Steam Generator Blowdown Isotopic Analysis for Dose 1 per 7 days'*
(Operating Modes I and 2)
Equivalent I-131 (1)
Until the radioactivity of the reactor coolant is restored to < 1 Ci/gm DOSE EQUIVALENT I-131.
(2)
Sample to be taken after a minimum of 2 EFPD and 20 days of power operation have elapsed since reactor was suberitical for 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> or longer.
(3)
Boron and chloride sampling / analyses are not required wben the core has been off loaded. Reinitiate boron and chloride sampling / analyses one shift prior to reloading fuel into the cavity to assure adequate shutdown margin and allowable chloride levels are met.
(4)
When Steam Generator Dose Equivalent I-131 exceeds 50 percent of the limits in Specification 2.20, the sampling and analysis frequency shall be increased to a minimum of 5 times per week. When Steam Generator Dose Equivalent I-131 exceeds 75 percent of this limit, the sampling and analysis frequency shall be increased to a minimum of once per day.
3 19 Amendment No. 23.67,35, ! 2 !. ! ? 3, W
U.S. Nuclear Regulatory Commission LIC-95-0135 1
ATTACHMENT B j
4
DISCUSSION, JUSTIFICATION AND NO SIGNIFICANT HAZARDS CONSIDERATIONS DISCUSSION AND JUSTIFICATION The Omaha Public Power District (0 PPD) proposes to revise the Fort Calhoun Station Unit No.1 Technical Specification (TS) 2.2 on the Chemical and Volume Control System (CVCS) to reformat, clarify the requirements, and be more consistent with the requirements of the Combustion Engineering Standard Technical Specifications (STS) as presented in NUREG-0212 Revision 2.
Specification 2.2(1)
TS 2.2(1)' specifies the requirements for borated water sources and flow paths when the reactor is subcritical and fuel is in the reactor.
In order for a flow path to be operable, a charging or high pressure safety injection pump is required to be operable to inject the boric acid solution into the Reactor
. Coolant System. Currently this specification does not state any operability requirements-for boric acid transfer pumps, charging pumps or high pressure safety injection pumps.
In addition, this specification does not state any required actions to be taken if the borated water source or flow path is not operable.
To correct these concerns, it is proposed that the requirements for the CVCS during shutdown be incorporated into separate Limiting Conditions for Operations (LCOs) that will address the requirements for borated water sources, boric acid flow paths, charging pumps, and boric acid transfer pumps, similar to CE Standard Technical Specifications 3.1.2.1, 3.1.2.3, 3.1.2.5, and 3.1.2.7 (NUREG-0212 Rev 2).
Applicability It is proposed that the specification be reworded from when the reactor is subcritical and fuel is in the reactor, to state that these requirements are applicable in Modes 4 and 5 when fuel is in the reactor.
Specifications It is proposed to incorporate separate LCOs for borated water sources, boric acid flow paths, charging pumps, and boric acid transfer pumps in Modes 4 and 5 when fuel is in the reactor. The allowed outage time is consistent with the allowed outage time of NUREG-0212 Revision 2 at 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.
Currently the Modifications of Minimum Requirements stated in TS 2.2(3) only address allowed outage times during Power Operations, and not Modes 3, 4, or 5.
1
l DISCUSSION AND JUSTIFICATION (Continued)
Required Actions It is proposed that required actions be added consistent with NUREG-0212 Revision 2.
The actions will require core alterations and positive reactivity changes to be suspended if there are no borated water sources, flow paths, or pumps operable that are required to inject boric acid solution into the reactor coolant system.
Soecification 2.2(2) l l
TS 2.2(2) specifies the minimum requirements for borated water sources.
L charging pumps, boric acid flow paths, boric acid transfer pumps and level instrumentation on the boric acid storage tanks when the reactor is critical.
Currently this specification has conflicting information. TS 2.2(2) contains l
information defining the boric acid storage tank as the tank, gravity feed, l
and boric acid transfer pump.
However, TS 2.2(2) addresses the requirements for boric acid transfer pumps separately.
To correct this concern, it is proposed that the requirements for the CVCS, whenever the reactor coolant temperature (T.i,) is greater than or equal to c
210*F, be incorporated into separate Limiting Conditions for Operation which will address the requirements for borated water sources, boric acid flow paths, charging pumps, and boric acid transfer pumps, similar to CE Standard Technical Specifications 3.1.2.2, 3.1.2.4, 3.1.2.6, and 3.1.2.8 (NUREG-0212 Rev 2).
Applicability It is proposed that the specification be reworded from "the reactor shall not be made critical," to state that these requirements are applicable whenever the reactor coolant temperature (T,,i,) is greater than or equal to 210'F.
Specifications It is proposed to incorporate separate LCOs for borated water sources, boric acid flow paths, charging pumps, and boric acid transfer pumps when the RCS temperature is greater than or equal to 210'F. The allowed outage time is consistent with the allowed outage time of NUREG-0212 Revision 2 and between the various components.
Currently, TS 2.2(3) is inconsistent as it allows a boric acid storage tank to be inoperable for 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> but a charging pump can only be inoperable for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
It is proposed that the Safety Injection and Refueling Water (SIRW) tank contain at least 25,000 useable gallons of borated water.
This volume is more than sufficient to reach cold shutdown at any expected refueling boron concentration.
As documented in CEN-391(0), reviewed by the NRC for issuance of Amendment 131, a volume of 21,788 gallons is required if the boron concentration is 1900 ppm.
2'
DISCUSSION AND JUSTIFICATION (Continued)
It is proposed to delete operability requirements for level instrumentation on the boric acid storage tanks.
Level instrumentation by itself does not fulfill a safety function. The level instrumentation does not actuate any safety functions, and the boric acid storage tanks are readily accessible to determine levels locally. The STS does not include operability requirements for boric acid level instrumentation as part of the reactivity control system LCO. The STS does include operability requirements for boric acid storage tank level instrumentation as part of the accident monitoring instrumentation.
FCS does not include boric acid storage tank level instrumentation as part of the accident monitoring instrumentation. However, FCS has operability requirements for Volume Control Tank level instrumentation as part of the Alternate Shutdown Panel requirements contained in TS 2.15.
Additionally, level instrumentation on the boric acid storage tanks does not meet any of the four criteria for inclusion into Technical Specifications as presented in the Final Policy Statement on Technical Specifications Improvements.
This instrumentation is not installed instrumentation used to detect a significant degradation of the RCS boundary, a design feature or operating restriction that is an initial condition of a Design Basis Accident, a component that is part of the primary success path or actuates to mitigate a DBA, nor is it a component that has been shown to be significant to public health and safety.
It is not the intent to abandon use of this level instrumentation; however, its testing and maintenance will be controlled outside of the TS.
Specification 2.2(3)
TS 2.2(3) specifies the Modifications of Minimum Requirements which are i
allowed during Power Operation. This specification is inconsistent with TS 2.2(2) which states the minimum requirements.
TS 2.2(2) states that system piping and valves shall be operable such that one of four conditions is i
satisfied, and lists the four flow paths allowed to meet the minimum requirements.
If the minimum requirements are met, no LC0 is entered.
However, TS 2.2(3) states that two of the four flow paths allowed are limited to a 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> outage time.
In addition, this specification is incomplete as it does not address components during Modes 3, 4, and 5.
To correct these concerns, it is proposed that the requirements for the CVCS during when the RCS temperature is greater than or equal to 210 F be incorporated into separate LCOs.
It is proposed that the Modifications of Minimum Requirements be added as Required Actions to the individual LCOs.
i 3
t l
l-c J
l l
DISCUSSION AND JUSTIFICATION (Continued)
Surveillance reauirements l
Borated Water Sources l
The surveillance requirements contained in STS 4.1.2.7.a and 4.1.2.8.a to verify the boron concentration, volume of boated water, and temperature of the boric acid tanks are similar to the present requirements of FCS TS.
TS 3.2, Table 3-4, items 2 and 3 address surveillance of boron concentration in the SIRW tank and boric acid storage tanks, respectively.
It is proposed to revise the frequency from monthly to weekly for boric acid storage tanks, to be consistent with NUREG-0212. No changes are proposed for the frequency of sampling the SIRW tank. Obtaining representative samples frm the SIRW l
tank requires an extended period of recirculation. Operating / testing history supports a monthly frequency as the boron concentration does not fall below l
the requirements.
TS 3.1, Table 3-2, item 15.a addresses surveillance of boric acid storage tank level.
It is proposed to revise the wording to state that the level will be verified and to change the frequency from daily to weekly to be consistent with NUREG-0212. Additionally, it is proposed to delete the requirements to functionally test and calibrate the level instrumentation based on deletion of the operability requirements.
TS 3.1, Table 3-2, item 13.a addresses surveillance of SIRW tank level.
The frequency will be maintained at once per shift since this surveillance requirement also fulfills the surveillance requirement for TS 2.3 on the Emergency Core Cooling System.
TS 3.1, Table 3-2, item 16.a addresses surveillance of the boric acid storage tank temperature.
It is proposed to revise the frequency of this surveillance from daily to weekly, and to reword the requirements to state that the temperature must be verified, to be consistent with NUREG-0212.
The surveillance requirement contained in STS 4.1.2.7.b. and 4.1.2.8.b to verify the borated water temperature of the Refueling Water Tank is similar to the present requirements of FCS TS 3.1, Table 3-2, item 18.a. to verify the temperature of the SIRW tank.
Both the STS and the FCS surveillance frequency is daily.
It is proposed to revise the FCS surveillance requirement to state that the temperature will be verified when the outside air temperature is less than 50 F or greater than 105'F.
The temperatures are based on the limit of 50 F stated in TS 2.3(1)a. and the 105 F assumption stated in Section 14.16 (Table 14.16-2) of the Updated Safety Analysis Report (USAR).
4
DISCUSSION AND JUSTIFICATION (Continued) l In addition, it is proposed to revise the frequency of the surveillance to 1
measure the temperature of the SIRW tank with standard lab instruments from quarterly to a refueling frequency.
The STS does not contain a surveillance on the SIRW tank level instrumentation as part of the reactivity control or the emergency core cooling systems specifications.
The STS does contain SIRW tank level instrumentation as part of the accident monitoring specifications i
and requires a monthly channel check and calibration on a refueling frequency.
Boric Acid Flow Paths
)
The requirements of STS 4.1.2.la and 4.1.2.2a to verify the temperature of the
' heat traced portion of the boric acid flow paths is not applicable to FCS as there is no heat tracing. No changes are proposed.
l The requirements of STS 4.1.2.2c to verify that each automatic valve actuates to its correct position once per 18 months on a SIAS signal is addressed by FCS TS 3.1, Table 3-2, item 3.
No changes are proposed.
The requirements of STS 4.1.2.2b to verify that each valve in the flow path i
that is not locked, sealed, or otherwise secured in position, is in its correct position once per 31 days is unnecessary and inconsistent with the remainder of the FCS TS.
FCS TS do not require periodic verification for system line-ups with the exception of containment isolation valves.
Therefore, no changes are proposed.
The requirements of STS 4.1.2.2d to verify that each boric acid flow path can deliver sufficient flow at least once per 18 months is unnecessary as active components are addressed by FCS TS 3.3 which controls ASME surveillance requirements. Therefore, no changes are proposed.
Charging Pumps The surveillance requirements contained in STS 4.1.2.3 and 4.1.2.4 to demonstrate that the charging pumps are operable are similar to FCS TS 3.3 which controls'ASME surveillance requirements. Therefore, no changes are proposed.
Boric Acid Transfer Pumps The surveillance requirements contained in STS 4.1.2.5 and 4.1.2.6 to demonstrate that the boric acid pumps are operable are similar to FCS TS 3.3 which controls ASME surveillance requirements. Therefore, no changes are proposed.
5
BASIS FOR NO SIGNIFICANT HAZARDS CONSIDERATION:
The proposed changes do not involve significant hazards consideration because operation of Fort Calhoun Station Unit No. 1 in accordance with these changes would not:
(1)
Involve a significant increase in the probability or consequences of an accident previously evaluated.
The proposed changes do not involve a significant increase in the probability or consequences of an accident previously evaluated. The proposed changes incorporate required actions, restrictions, and i
surveillance requirements for the Chemical and Volume Control System l
(CVCS) similar to Combustion Engineering Standard Technical Specifications (NUREG-0212 Revision 2).
Technical Specification (TS) 2.2(1) specifies the requirements for borated water sources and flow paths when the reactor is subcritical and fuel is in the reactor.
In order for a flow path to be operable, a charging or high pressure safety injection pump is required to be operable to inject the boric acid solution into the Reactor Coolant System.
Currently this specification does not state any operability requirements for boric acid transfer pumps, charging pumps or high pressure safety injection pumps.
In addition, this specification does not state any required actions to be taken if the borated water source or flow path is not operable.
Therefore, the proposed changes incorporate requirements for the CVCS during shutdown into separate Limiting Conditions for Operations (LCOs) that will address the requirements for borated water sources, boric acid flow paths, charging pumps, and boric acid transfer pumps.
The proposed changes delete operability and surveillance requirements I
for level instrumentation on the boric acid storage tanks.
Level instrumentation by itself does not fulfill a safety function.
The proposed changes will still require verification of tank level.
Additionally, level instrumentation on the boric acid storage tanks does
)
not meet any of the four criteria for inclusion into Technical Specifications as presented in the Final Policy Statement on Technical Specifications Improvements.
This instrumentation is not installed j
instrumentation used to detect a significant degradation of the RCS boundary, a design feature or operating restriction that is an initial condition of a Design Basis Accident, a component that is part of the primary success path or actuates to mitigate a DBA, nor is it a component that has been shown to be significant to public health and safety.
Therefore, testing and maintenance of the level instrumentation will be controlled outside of the TS.
6
i
\\
BASIS FOR NO SIGNIFICANT HAZARDS CONSIDERATION (Continued):
TS 2.2(3) specifies the Modifications of Minimum Requirements that are allowed during Power Operation. This specification is inconsistent with TS 2.2(2) which states the minimum requirements and is incomplete as it does not address components during Modes 3, 4, and 5.
The proposed changes incorporates consistent allowed outage times for the various components, and additional required actions for component inoperability during Modes 4 and 5 when fuel is in the reactor.
The proposed changes incorporate additional operability requirements for the CVCS and required actions to be taken for CVCS component inoperability during Modes 4 and 5 when fuel is in the reactor.
The proposed changes delete inconsistencies and clarify operability l
requirements for the CVCS whenever the reactor coolant temperature (Ta) is greater than or equal to 210'F, and ensures that operation of the system is consistent with its design bases.
The proposed changes also revise the allowed outage time for CVCS components from 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> to 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> based on Standard Technical Specifications.
This change is insignificant based on the FCS plant specific probabilistic risk assessment.
Therefore, the proposed changes do not involve a significant increase in the probability or consequences of an accident previously evaluated.
(2)
Create the possibility of a new or different kind of accident from any previously analyzed.
There will be no physical alterations to the plant configuration, changes to setpoint values, or changes to the implementation of 4
setpoints or limits as a result of this proposed change.
No new modes of operation are proposed.
Therefore, the proposed change does not i
create the possibility of a new or different kind of accident from any previously analyzed.
(3)
Involve a significant reduction in a margin of safety.
The proposed changes incorporate additional operability requirements, delete inconsistencies, and clarify operability requirements for the CVCS to ensure that operation of the system is consistent with its design bases. Therefore, the proposed changes do not involve a significant reduction in a margin of safety.
Therefore, based on the above considerations, it is OPPD's position that this proposed amendment does not involve significant hazards considerations as defined by 10 CFR 50.92 and the proposed changes will not result in a condition which significantly alters the impact of the Station on the environment.
Thus, the proposed changes meet the eligibility criteria for categorical exclusion set forth in 10 CFR 51.22(c)(9), and pursuant to 10 CFR 51.22(b) no environmental assessment need be prepared.
7
,.