ML20216D155
| ML20216D155 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek  |
| Issue date: | 09/02/1997 |
| From: | WOLF CREEK NUCLEAR OPERATING CORP. |
| To: | |
| Shared Package | |
| ML20216D152 | List: |
| References | |
| NUDOCS 9709090225 | |
| Download: ML20216D155 (12) | |
Text
Attachtnent IV to ET 97-0075
, Page 1 of 5 l
i ATTACHMENT IV _
PROPOSED TECHNICAL SPECIFICATION CHANGES CURRENT TECHNICAL SPECIFICATIONS
-9709090225'970902 PDR ADOCK 05000482' P. ; PDR ia
Attochment IV to ET 97-0075
'.. Pace 2 of 5 PLANT SYSTEMS
' AUXILIARY FEEDWATER SYSTEM tlMITING CONDITION FOR OPERATION 3.7.1.2 At least three independent steam generator auxiliary feedwater prp and :::eciated fl= p;ths shall be OPERABLhith;
-0 . Two-motor 4r4ven-49x4444ey-feedwater-pe:p:, :: h ::p:bleef being-
- =
- red-from-separate :::rg:ncy bu::::, :nd
-b. On: :t**m-tuebine driv:n : x444*ey-feed::ter pr; c:pabit Of bein; p=:r:d f re: :: OPERABL-E-ste:m : pply-syst+m.
APPLICABILITY: MODES 1, 2, and 3. .
b rsuem oh Nn ACT10N: h-in -
dCTICA1 l' *r C 4
- a. With-one auxiliary feedwater pump inoperable, restore the r:quir;dkM auxiliary feedwate pumpt to OPERABLE status within 72 houryor be -
inatleastHOTSTANDBYwithin@thenext6hoursandinHOTlSHUTDO mours. W d'% $cidag #*M""-
hD -*within the followi tOf;*M With two auxiliary feedwate pumps inoperable, bem *M$NOT g -tr-t STANDBYwithin6hoursandinHOTSHUTDOWNwithinthe'ollowing6@
hours.
%.n.
Q,e; With three auxiliary feedwater pumps inoperable, immediately initiate corrective action to restore at least one auxiliary feedwater to OPERABLE status as soon as possible.L*)
- t. -
SURVEILLANCE RE0VIREMENTS 4.7.1.2.1 Each auxiliary feedwater pump shall be demonstrated OPERABLE:
- a. At least once per quarter on a STAGGERED TEST BASIS by: l
- 1) Verifying that each motor-driven pump develops a discharge pressure of greater than or equal to 1535 psig on recirculation flow when tested pursuant to Specification 4.0.5;
- 2) Verifying that the steam turbine-driven pump develops a discharge pressure of greater than or equal to 1625 psig at a flow of greater than or equal to 120 gpm when the secondary steam supply pressure is greater than 900 psig. The provisions of Specification 4.0.4 are not applicable for entry into MODE 3;
r>
WOLF CREEK - UNIT 1 3/4 7-4 Amendment No. 77
_~_J
Attachment IV to ET 97-0075
- ,' Page 3 of 5 t
PLANT SYSTEMS i-
! BASES SAFETY VALVES (Continued)
Y = Maximum relieving capacity of any one safety valve in 1bs/ hour.
l l 3/4.7.1.2 AUXILIARY FEE 0 WATER SYSTEM The OPERABILITY of the Auxiliary Feedwater System ensures that the Reactor Coolant System can be cooled down to less than 350*F from normal operating conditions in the event of a total loss-of-offsite power.
Testing _of each electric motor-driven : ::,,m , fees..ter pump on a fixed orifice recirculation flow and ensuring a discharge pressure of greater than or equni to 1535 psig verifies the capability of each pump to deliver a total feed-waterflowatthepumpdischargeof575gpmandcreatinopressureof1221ysig(g.
tu the entrance of the steam generators. The deem' driven ::: li;ry ft;i:ter
@ pump is capable of delivering a total feedwater flow at the pump discharge of 1145 gpm and creating a pressure of 1221 psig to the entrance of the steam generators. This capacity is sufficient to ensure that adequate feedwater flow ,
is available to remove decay heat and reduce the Reactor Coolant System tempera- <
ture to less than 350'F when the RHR System may be placed into operation.
3/4.7.1.3 CONDENSATE STORAGE TANK The OPERABILITY of the condensate storage tank with the minimum water volume ensures that sufficient water is available to maintain the RCS at HOT STANDBY conditions for 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> with steam discharge to the atmosphere concurrent with total loss-of-offsite power and then a cooldown to 350'F at 50 F per hour. The contained water volume limit includes an allowance for water not usable because of tank discharge line location or other physical characteristics.
3/4.7.1.4 SPECIFIC ACTIVITY The limitations on Secondary Coolant System specific activity ensure that the resultant offsite radiation dose will be limited to a small fraction of 10 CFR Part 100 dose guideline values in the event-of a steam line rupture.
This dose also includes the effects of a coincident 1 gpm reactor to secondary tube leak in-the steam generator of the affected steam line.- These values are consistent with the assumptions used in the safety analyses.
f l WOLF' CREEK - UNIT l' B 3/4 7-2
8
. Attachment IV to ET 97-0075
. Page 4 of 5 CURRENT TECHNICAL SPECIFICATION (CTS) AND CTS BASES INSERTS INSERT At
- b. With one of the Essential Service Water flow paths to the turbine-driven auxiliary feedwater pump inoperable, restore the required supply flowpaths to OPERABLE status within 7 days, and within 10 days from discovery of failure to meet the LCO, or be in at least HOT STANDBY l within the next 0 hours0 days <br />0 hours <br />0 weeks <br />0 months <br /> and in HOT SHUTDOWN within the following 12 I hours,
- c. With one steam supply to the turbine-driven auxiliary feedwater pump inoperable, restora the steam supply to OPERABLE status within 7 days, and within 10 days from discovery of failure to meet the LCO, or be in at least HOT STANDBY 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 HOT SHUTDOWN within the following 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.
INSERT B:
l
- LCO 3.0.3 and all other LCO ACTIONS requiring MODE changes are suspended until one auxiliary feedwater train is restored to OPERABLE status.
INSERT C:
The Auxiliary Feedwater (AFW) System is configured into three trains. The AFW System is considered OPERABLE when the components and flow paths required to provide redundant AFW flow to the steam generators are OPERABLE. This requires that the two motor-driven AFW pumps be OPERABLE in two diverse paths, each capable of automatically transferring the suction from the condensate storage tank to an Essential Service Water (ESW) supply and supplying AFW to two steam generators. The turbine-driven AFW pump is required to be OPERABLE with redundant steam supplies from each of two main steam lines upstream of the MSIVs, and shall be capable of automatically transferring the suction from the condensate storage tank to redundant ESW supplies and supplying AFW to any of the steam generators. The piping, valves, instrumentation, and controls in the required flow paths also are required to be OPERABLE. The inoperability of a single supply line or a single suction isolation valve from an ESW train to the turbine-driven AFW pump causes a loss of redundancy in ESW supply to the pump but does not render the turbine-driven APW pump inoperable.
Therefore, with one ESW train inoperable, the associated motor-driven AFW train is considered inoperable; and one turbine-driven AFW pump supply line is considered inoperable. However, the turbine-driven AFW pump is OPERABLE based on the remaining OPERABLE ESW supply line.
The second completion time for ACTION a, b and c establishes a limit on the maximum time allowed for any combination of conditions to be inoperable during any continuous failure to meet the LCO. The 10 day completion time provides a limitation time allowed in this specified ACTION after discovery of failure to meet the LCO. The "and" between the completion times dictates that both completion times apply simultaneously, and the more restrictive must be met.
~ ' " -
8
. Attachment IV to ET 97-0075
. Page 5 of 5
. 1 If all three AFW trains are inoperable, the unit is in a seriously degraded condition with no safety related means for conducting a cooldown, and only limited means for conducting a cooldown with nonsafety related equipment. In i such a condition, the unit should not be perturbed by any action, including a power change, that might result in a trip. The seriousness of this condition l requires that action be started immediately to restore one AFW train to l OPERABLE status. In this case, LCO 3.0.3 is not applicable because it could i force the unit into a less safe condition.
l l
l
8
, Attachment V to ET 97-0075
. Page 1 of 7 l
l ATTACHMENT V PROPOSED TECHNICAL SPECIFICATION CHANGES IMPROVED TECHNICAL SPECIFICATIONS m
. Attachment V to ET 97-0075
. Page 2 of 7 MM System 3.7.5 3.7 PL M SYSTEMS.
3.7.5 Auxiliary feedwater (AFW) System LCO 3.7.5 Three AFW trains shall be OPERABLE.
! APPLICABILITY: MODES 1. 2. and 3.
ACTIONS COM)ITION REQUIRED ACTION COMPLETION TIME A. One steam supply to A.1 Restore steam supply 7 days turbine driven AW pop to OPERABLE status.
inoperable. E l
10 days from discovery of failure to meet the LCO Tb Q
_ Qg. One AFW train inoperable f.1 Restore AFW train to 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> for reasons other than OPERABLE status.
Condition A. M 10 days from discovery of-failure to meet the LCO (continued)
. = _ .
Attachment V to ET 97-0075
, ,' Page 3 of 7 3.7.5 ACTIONS (continued)
CONDITION REQUIRED ACTION COMPLETION TIME hg. O Required Action and f.1 Be in MODE 3, 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> associated Completi Time for Condition Atil or[notmet.
UC @)2 7 Be in H00E 4. 18 hours2.083333e-4 days <br />0.005 hours <br />2.97619e-5 weeks <br />6.849e-6 months <br /> 2
Two AFM trains inoperable.
. Three AFW trains F.1 NOTE -
j inoperable. LCO 3.0.3 and all other LCO Required Actions requiring H0DE changes are suspended until one AFW train is restored to OPERABLE status.
Initiate action to Immediately restore one AFV train to OPERABLE status.
0
. Attachment V to ET 97-0075
. Page 4 of 7 g 3,,
B 3.7.5 B 3.7 PLANT SYSTEMS B 3.7.5 Auxiliary Feedwater (AN) System BASES BACKGROUND The AN System automatically supplies feedwater to the steam generators to remove decay heat from the Reactor Coolant System upon the loss of normal feedwater supply. The AN pumps normally take suction through a comon suction line from the condensate storage tank (CST) (LCO 3.7.6). Should the CST become unavailable, cooling water is available from the Essential Service Water (ESW) system. Each motor driven AN pump is l supplied from its respective ESW train. The steam turbine driven AN pump is supplied from either ESW train. The AFW pumps discharge to the steam generator secondary side via separate and independent connections to the main feedwater (MN) piping outside contairinent. The steam generators function as a heat sink for core decay heat. The heat load is dissipated by releasing steam to the atmosphere from the steam generators via the main steam safety valves (HSSys) (LLO 3.7.1) or atmospheric relief valves (LCO 3.7.4). If the main condenser is available.
steam may be released via the steam dump valves and pumped back to the CST.
The AFW System consists of two motor driven AFW pumps and one steam turbine driven pump configured into three trains. Each motor driven pump provides 100% of the feedwater flow required for removal of decay heat from the reactor. The turbine driven-pump provides 200* of the capacity of a motor driven pump. The pumps are equipped with recirculation lines to prevent pump operation against a closed system. Each motor driven AN pump is powered from an independent Class 1E power supply and feeds two {
steam generators, although each pump has the capability to be locally aligned to feed other steam generators. The steam turbine driven AFW pump receives steam from two main steam lines upstream of the main steam isolation valves. Each of the steam feed lines will supply 100% of the requirements of the turbine ,
driven AFW pump.
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waum.ma % esweg % .im @-
scey, ,4 +we. cequiremenh e4 h turbhe. drwen ,
W P"Q-(continued) ,
WCGS ITS BASES B 3.7 25 5/15/97
s 6
Attachment V to ET 97-0075
. ,' Page 5 of 7 AFW System B 3.7.5 BASES mm ACTIONS @ er condib (continued) -
With one of the required AFM trains (pump or f path) inoperable for reasons other than Condition A. action must be taken to restore OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />. This Condition includes the loss of two steam supply line to the turbine driven AFW pug. The 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> Completion Time is easonable, based on redundant capabilities afforded by the AFI System, time needed for repairs, and the low probability __of a DBA occurring during this time period. {+ausw uprty hbe }
The second Completion Time for Required Action f.1 establishes a limit on the maximin time allowed for any combination of Conditions to be inoperable during any continuous failure to meet this100.
The 10 day Completion Time provides a limitation time allowed in this specified Condition after discovarr of failure to meet the -
LCO. This limit is considered reasonable for situations in which Conditions A ;.M C are entered concurrently. The etC connector between 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> and 10 days dictates that both Completion Times apply simultaneously, and the more restrictive must be met.
@f.1 and@L 2 When Required Action A.1 or B.1 cannot be completed within the required Completion Time, or if two AFW trains are inoperable ,
the unit must be placed in a H0DE in which the LCO does not apply. To achieve this status, the unit must be placed in at
-least H0DE 3 within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, and in H0DE 4 within 18 hours2.083333e-4 days <br />0.005 hours <br />2.97619e-5 weeks <br />6.849e-6 months <br />.
The allowed Completion Times are reasonable, based on operating experience, to reach the required unit conditions from full power conditions in an orderly manner and without challenging unit systems.
(continued)
WCGS ITS BASES B 3,7 30 5/15/97 i
'.. Attachment V to ET 97-0075 Page 6 of 7 AN System B 3,7,5 BkSES ACTIONS 1.1 (continued)
If all three AFW trains are inoperable, the unit is in a seriously degraded condition with no safety related means for conducting a cooldown, and only limited means for conducting a cooldown with nonsafety related equipment, In such a condition, the unit should not be perturbed by any action, including a power change, that might result in a trip. The seriousness of this condition requires that action be started immediately to restore one AFW train to OPERABLE status.
Required Action 5.1 is modified by a Note indicating that all
' required MODE changes or power reductions are suspended until one AFW train is restored to OPERABLE status. In this case, LCO 3.0.3 is not applicable because it could force the unit into a less safe condition.
SURVEILLANCE SR 3.7.5.1 REQUIREMENTS Verifying the correct alignment for manual, power operated, and automatic valves in the AFW System water and steam supply flow paths provides assurance that the proper flow paths will exist for AFW operation. This SR does not apply to valves that are locked, sealed, or otherwise secured in position, since they are verified to be in the correct position prior to locking, sealing, or securing.. This SR also does not apply to valves that cannot be inadvertently misa11gned, such as check valves. This Surveillance does not require any testing or valve manipulation; rather, it involves verification that those valves capable of being mispositioned are in the correct position.
In order for the TDAFP and EAFPs to be OPERABLE while the AFW system is in automatic control or above 10% RTP, the discharge flow control valves shall be in the full open position. The turbine and motor driven pumps remain OPERABLE with the discharge flow control valves throttled to maintain steam generator levels during plant heatup, cooldown, or if started due to an Auxiliary Feedwater Actuation Signal (AFAS) or manually started in anticipation of an AFAS.
(continued)
WCGS ITS BASES B 3,7 31 5/15/97
n
. Attachment V to ET 97-0075
, Page 7 of 7 IMPROVED TECHNICAL SPECIFICATION (ITS) AND ITS BASES INSERTS INSERT lt B. One ESW supply to B.1 Rostore ESW supply to 7 days turbine driven AFW OPERABLE status, pump inoperable AND l
i 10 days from discovery of failure to meet the LCO INSERT 2:
EL1 I With one of the two ESW supply lines in the turbine driven APW train i inoperable, action must be taken to restore the inoperable ESW supply line to OPERABLE status within 7 days. One inoperable ESW supply line in the turbine driven AFW train does not render the turbine driven AFW pump inoperable since the turbine oriven AFW train is provided with redundant ESW supply lines. The 7 day Completion Time is reasonable based on the following reasons:
- b. The availability of the preferred, non-safety grade supply of water from the CST;
- d. The low probability of an event occurring that requires the inoperable ESW supply line to the turbine driven AFW pump; and
- e. The 7-day Corapletion Time is consistent with the allowed Completion Time for one steam supply flow path to the turbine driven AFW pump.
The second Completion Time for Required Action B.1 establishes a limit on the maximum time allowed for any combination of Conditions to be inoperable during any continuous failure to meet this LCO.
The 10 day Con.pletion Time provides a limitation time allowed in this specified Condition after discovery of failure to meet the LCO. This limit'is considered reasonable ior situations in which Conditions A and B are entered concurrently. The AND connector between 7 days and 10 days dictates that both Completion Times apply simultaneously, and the more restrictive must be met.