ML18054A821

Proposed Tech Specs Sections 1.0,2.0 & 3.0,incorporating New Requirements for Shutdown Cooling Sys Operation

ML18054A821
Person / Time
Site:	Palisades
Issue date:	06/28/1989
From:	CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:
Shared Package
ML18054A819	List: ML18054A818 ML18054A820 ML18054A821
References
NUDOCS 8907030280
Download: ML18054A821 (20)

Text

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• ATTACHMENT 1 Consumers Power Company Palisade's Plant *

• Docket 50-255 ** PROPOSED TECHNICAL SPECIFICATION PAGE CHANGES OC0689-0140-NL04 8907030280 PDR ADOeK 05000255 p PDC June 28, 1989 ,, ' 9 Pages v' \\, I 1.* SECTION. 1.0 1.1 1. 2 1.3 1.4 2.0 * ** PALISADES PLANT TECHNICAL SPECIFICATIONS DESCRIPTION DEFINITIONS REACTOR OPERATING CONDITIONS PROTECTIVE SYSTEMS INSTRUMENTATION SURVEILLANCE MISCELLANEOUS DEFINITIONS SAFETY LIMITS AND LIMITING SAFETY SYSTEM SETTINGS PAGE NO 1-1 1-1 1-3 1-3 1-4 2-1 2.1 SAFETY LIMITS -;REACTOR CORE 2-1 2.2 SAFETY LIMITS -PRIMARY COOLANT SYSTEM PRESSURE .2-3 2.3 SAFETY SYSTEM SETTINGS -REACTOR PROTECTIVE SYSTEM 2-4 Table 2.3.1 Reactor Protective System Trip Setting Limits 2-5 3.0 3.0 3.1 3 .. 1.1 Figure 3-0 3 .1. 2 Figure.3-1 Figure 3-2

• Figure. 3-3 3.1. 3 .3.1.4 3.1. 5 3.1. 6 3.1. 7 3.1. 8 3.1. 9 3.2 3.4 3.5 3.6 3 *. 8 *3.9 TSP0689-0140-NL04 LIMITING CONDITIONS FOR OPERATION APPLICABILITY PRIMARY COOLANT SYSTEM Operable Components Reactor Inlet .. Temperature vs. Operating Pressure Heatup and Cooldown Rates

• Pressure -Temperature Limits for Heatup Pressure -Temperature Limits for Cooldown Temperature Limits for.Hydro -Test Minimum Conditions for Criticality . Maximum Primary Coolant Radioactivity Primary Coolant System Leakage Limits Maximum Primary Coolant Oxygen and Halogens Concentrations Primary and Secondary Safety Valves. Overpressure Protection Systems . Shutdown.

Cooling CHEMICAL AND VOLUME CONTROL SYSTEM EMERGENCY CORE COOLING SYSTEM CONTAINMENT COOLING STEAM AND FEEDWATER SYSTEMS CONTAINMENT SYSTEl-l:

ELECTRICAL SYSTEMS OPERATIONS EFFLUENT RELEASE (DEtETED)

' i 3-1 3-1 3-lb. 3-lb 3-3a 3-4 3-9 3-10 3-11 3-12* 3-17 3-20 3-23 3-25 3-25a 3-25c 3-26 3-34 3-38 3-40 3-41 3-46 3-50 Amendment No. $1, $7, 8$, .l0S, llS, I I '3. 1. 3.1. 9 PRIMARY .ANT SYSTEM (PCS) (Continued)

• • SHUTDOWN COOLING -This section only applies with fuel in the reactor. a. PCS.Temperature

>260°F and <325°F At least two of the loops or trains listed below shall be operable and at least one loop or train shall be in operation:

1. Primary Coolant System Loop 1 consisting of an operable Steam Generator and at least one operable.

Primary Coolant Pump (PCP). 2. Primary Coolant .System Loop 2 consisting of an operable Steam Generator and at least one operable I_>rimary Coolant Pump (PCP). 3. Shutdown Cooling Train A. 4. Shutdown Cooling Train B. EXCEPTION:

All PCPs and Shutdown Cooling may be intentionally secured provided:

' ACTION-a. No operations are permitted that would cause reduction of the PCS boron concentration, AND .. Core outlet temperature stays at least 10°F. below' saturation temperature.

I I I I I I I I I I I I I I I I I I I /, I I I I I I I I I I I I I I A. If only 1 PCS 16op is operable and no SDC, trains are operable:_, ( 1. Immediately initiate corrective action to return a second loop or train to operable status. : I I /. I B. 'If only 1 SDC train is operable and no PCS loops are.operable:

l c. 1. Immediately initiate corrective action to return a *second loop or train to operable status, 2:-If a second loop or .train cannot be returned to operable status be less than 200°F within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. If no PCS loops or Shutdown Cooling trains are in operation when required:

I I I I / I I I l 1. Immediately suspend all operations involving a I reduction in PCS boron concentration, I I 2:-Immediately initiate corrective action to return the I required loops or trains to operation.

I 3-25c Amendment No. TSP0689-0140-NL04

'..3. 1. 3.1. 9 PRIMARY SYSTEM (PCS) (Continued)

• SHUTDOWN COOLING (Continued)

• b. PCS. Temperature

-Loops_ Filled At least one of the loops or trains listed below shall be operable and in operation and one additional loop or train shall be operable or the secondary side water level of each steam generator shall be higher than minus 84%: 1. Primary Coolant System Loop 1 consisting of an operable Steam Generator and at least one operable Primary Coolant Pump (PCP). 2. Primary Coolant System Loop 2 consisting of an operable Steam Generator and at least one operable Primary Coolant Pump (PCP). 3. Shutdown Cooling Train A. 4. Shutdown*Cooling Train B. EXCEPTION:

All PCPs and Shutdown Cooling may be intentionally secured provided:

ACTION A. If only one PCS loop or SDC train is operable when two are required:

1. Immediately initiate corrective action to return the required loops or trains to operable status. B. If a required Steam Generator has less than the specified water level: c. 1. Immediately initiate corrective action to restore the required Steam Generator wate.r level. If no PCS loops or Shutdown Cooling trains are in operation when required:*

1. Immediately suspend all operations involving a reduction in PCS boron concentration,

• Al'.ID 2:-Immediately initiate corrective action to return the required loops or trains to operation.

3-25d Amendment No. TSP0689-0140-NL04 I I I I t I I I ./ I I I I I / I I I I I I I I I I I I I I I I I /' I I I I I I I I I I . I I I / I I /* ... I I I I I IJ \ 3.1. 3.1. 9 *

• PRIMARY COOLANT SYSTEM (PCS) (Continued)

SHUTDOWN COOLING (Continued)

--c. PCS Temperature

-Loops not filled -. . --Two Shutdown Cooling trains (SDC) shall be operable, and at least one train shall be in operation.

EXCEPTIONS:

1. One SDC train may be intentionally rendered inoperable for testing or maintenance provided:

a. The other SDC-train is in operation.

2. All Shutdown Cooling may be intentionally secured provided:

ACTION a. No.operations are permitted that would cause reduction of the PCS boron concentration, AND b. Core outlet temperature.does not exceed 200°F. A. If only one SDC train is operable when two are required:

1. Immediately initiate corrective action to return two trains to operable status. B. If no SDC trains are in operation when required:

1. Immediately suspend all operations involving a reduction in PCS boron concentration, AND 2. Immediately initiate corrective action to return the required tr:ains to operation.

3-25e Amendment No. TSP0689-0140-NL04 I I I I 1 I I I I I I I I I I I I I I I I I I I I I I I *1 I I I !' I I I I I I ./ I I I 9 .1. PRIMARY SYSTEM (Continued) 3.1. 9 SHUTDOWN COOLING (Continued)

• • BASIS A shutdown cooling train may vary in actual component configuration, method of operation and control, but it shall always accomplish the objective of transferring decay heat from the reactor to Lake Michigan as the ultimate heat sink. As a minimum, a shutdown.

cooling train requires:

a shutdown cooling pump, one component cooling water pump, one service water pump, and appropriate piping, valves and controls for the equipment to perform its function.

All of this equipment must also have adequate electrical power to be operable. "Loops filled" means the Primary Coolant system (PCS) loops are intact, not blocked by dams and totally filled with _coolant.

This permits partial draining of the PCS provided air has not entered PCS The loops are considered "not filled" after the PCS has been drained so ?ir has entered the loops and.air sweeps have not been completed to remove the air. Once the PCS loops have been drained to any extent (install steam generator nozzle dams* for example)*

there could be sufficient air trapped in the upper portion of the steam generator u-tubes,,even after the PCS water level is raised, to prevent in the PCS. For this reaion, the steam generators.cannot be considered operable when* the PCS loops are not completely filled with coolant and the air sweeps completed.*

With the PCS temperature.>200°F and <325°F a single primary coolant loop or shutdown cooling_ train provides sufficient heat capability for removing decay heat. Natural circulation .is adequate for core heat. removal, however it may not provide adequate mixing of the PCS coolant* during PCS boron concentration changes. T"herefore, forced circulatiqn is required during these operating except during intervals when the required loops or trains can be intentionally rendered inoperable provided additional constraints are followed.

Single failure considerations require a second loop or train (either PCS or shutdown.

cooling) be operable.

With the PCS temperature

<200°F and the loops filled, a single primary coolant loop or shutdown cooling train provides sufficient heat removal capability for removing decay heat. The steam generators remove heat by

• bulk heating of the secondary side water rather than creating steam. Natural circulation is adequate as a backup means for core heat .removal_, however it may not provide c;idequate mixing of the PCS coolant. du.ring PCS boron concentration changes. In additon, it is difficult to maintain PCS temperature

<200°F, if the only method. of core heat removal is natural circulation.

Therefore' force_d circulation is required during these operating conditions, except during intervals when the required _loops *_o_r_ trains can be intentionally secured provided additional constraints are followed.

• *s:lng1e*

failure consideranons require* a second* loop, train, or the secondary side water ],eve! of both steam generators be above minus 84%. A steam generator secondary water'level of at least a minus 84% is sufficient to natural circulation in the PCS. 3-25f Amendment No. TSP0689-0140-NL04 I I I I I I I I I I I I I I I I I I ) I I I I I I I I j I I I I I I I I I I I I I I I I I I I I I I I I I '.

v' .-----l *

• 3.1. PRIMARY COOLANT SYSTEM (PCS) (Continued)

3. 1. 9 SHUTDOWN COOLING (Continued)

• BASIS-(Continuear*

• With the PCS temperature and the loops not filled, a single shutdown cooling. train provides sufficient heat removal capability for removing decay heat. To provide adequate mixing o.f the PCS coolant during PCS boron concentration changes, forced circulation is required during this operating condition except during intervals when the required trains can be intentionally rendered inoperable provided additional constraints are followed.

Single failure considerations, and the unavailability of the steam generators as a heat removing component, require that a second \l shutdown cooling train be operable.

All forced circulation may be isolated provided actions are taken to prevent dilution of the PCS and avoid situations that could produce steam in.the reactor vessel. When the P.CS temperature is >200°F and <325°F, maintaining subcooling ensures availability of single phase naturaL circulation.

When the PCS is exceeding 200°F ensures the availability of a single phase circulation.

A redundant train of SDC may be intentionally rendered inoperable for testing ormaintenance for any time interv'al provided the.other SDC train is in operation.

No time limit is specified because the time interval that is needed for each required evolution could vary. This. method .*oJ operating equipment is c6nsistent with the intent rif Generic Letter 88-17, Loss of De.cay Heat Removal. It is recommended that equipment, be . and tested as appropriate to create an acceptable level of confidence that the systems will be able to perform t_heir decay heat removal function.

Therefore, appropriate testing or maintenance is considered prudent and justified, without any specific time* litnit related to equipment that may .be inoperable to permit such evolutions.

In all cases, th.e intent is to t*ake reasonaQle actions to minimize the use of exception No. 1. of specification 3,1.9.c. If it is required to use exception No. 1 of specification 3.1.9.c, SDC will not be rendered inoperable where PCS temperature is close to 200°F or the PCS heatup would result in the PCS temperatu,re e_xceeding 200°f in a relatively short period of time. 3-25g Amendment No. TSP0689-0140-NL04 I I I I I I I I l I I I I I I I I *1 I I I I I I I ./ /. I I I I /* I I I I I '/ I I 3.7 3.7.3 *

• ELECTRICAL SYSTEMS (Continued)

SHUTDOWN COOLING ELECTRICAL REQUIREMENTS With the primary coolant -at <325 °F' and -with fuel in reactor, t_he shutdown cooling train(s) shall be electrically powered as follows: a. If one train of shutdown cooling is required to meet specification 3.I;9: 1. The appropriate engineered safeguards bus (IC or ID) shall be operable and capable of beirig supplied by offsite power and an operable diesel generator.

OR 2. Have two trains of shutdown cooling operable, and. meet all the requirements of 3.7.3.b below. b. If two trains of shutdown cooling are required to meet specification 3.I.9, one engineered safeguards bus (IC or ID) shall be operable capable of b_eing supplied by offsite power while the 'other engineered safeguards bus (ID or IC) is operable and capable of being supplied by an operable diesel generator.

ACTION-With less than the required electrical sources A. Immediately initiate action to suspend core alterations, AND B. Immediately initiate action to suspend movement of_* irradiated fuel,

• AND c. Immediately suspend crane operations over irradiated, ,.fuel, AND D. Suspend operations with a potential for draining.the PCS or *fuel pool, AND E. Initiate action to restore required electrical sources to operable status. 3-45a Amendment No. TSP0689-0I40-NL04 I I I I I / I I I I I I I I I I I I I I I I I I ./ I I I I I I I I I I I I I I I */ I ./ '/ I I I I ./ -I I I I.' ,, .. " .3, 7 3.7.3 (Continued)

• SHUTDOWN COOLING ELECTRICAL REQUIREMENTS (Continued)

Basis The operability of the minimum specified power sources and associated distribution systems during shutdown and refueling ensures that: 1. The plant can be maintained in the shutdown or refueling operating condition for extended time periods, arid 2. Sufficient control capability is available for maintaining the plant status. When a single train of shutdown cooling must be operable to meet the minimum equipment operability requirements to_ remove decay heat, that train must still function following the_ loss of one electric supply (off site power. or diesel generator). . . When two trains of shutdown cooling must be operable to meet the minimum equipment operability requirements to remove decay heat, the loss of any single pump or the loss of one electrical supply (offsite power or diesE!l generator)_

must still leave a shutdown cooling train'.operable.

The action statements will

• the occur*rence of postulated events, however, they not preclude thE! orderly completion of an activity, such as fuel movement or crane operation, in order to get into a safe and conservative position.

-. 3-45b Amendment No. TSP0689-0140-NL04 I I I I I -I I I I I I I I I I I I I I I I I I I I I I -/ I / 1/

.. ... /' * * --Table 4.2.2 (Contd) Minimum Frequencies for Equipment Tests 12. Iodine Removal System The .Iodine Removal System shall be demonstrated operable:

a. At least once per 31 days by verifying that each valve (manual, power operated or automafic) in the flow path that is not locked, sealed or otherwise secured in position, is in its correct position.

b. At once per 6 months by: 1. Verifying that tanks T-102 and T-103 contain the minimum required volumes. 2. Verifying the concentration of hydrazine iri T-102 and sodium hydroxide in T-103. At least once per cycle, during shutdown, by verifying that automatic valve in the flow path actuates to its correct position.

13. Containment Purge and Ventilation Isolation Valves 14. The Containment Pui;ge and Ventilation Isolation Valves shall be determined closed: a. At least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> by checking the valve position indicator in the control room b. At least once every 6 months by performing a leak rate test . between the Steam penerator Water Level For any steam generator*

requirec;l to mee.t the shutdown cooling requirements of specification 3.1.9, its secondary water level shall be verified at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> to be above minus 84%. 4-15b Amendment TSP0689-0140-NL04 I I I I I OC0689-0140-NL04

• ATTACHMENT 2 Consumers Power Company Palisades.Plant Docket 50-255

• MARKED UP TECHNICAL SPECIFICATION PAGES June 28, 1989 9 Pages

,;., INSERT SECTION 1.0 1. l 1.2 l. 3 1.4 2.0 *

• PALISADES PLANT TECHNICAL SPECIFICATIONS TABLE OF CONTENTS -APPENDIX A DESCRIPTION DEFINITIONS REACTOR OPERATING CONDITIONS PROTECTIVE SYSTEMS INSTRUMENTATION SURVEILLANCE MISCELLANEOUS DEFINITIONS SAFETY LIMITS AND LIMITING SAFETY SYSTEM SETTINGS 2. l

• SAFETY LIMITS -REACTOR CORE . . . 2.2 SAFETY LIMITS -PRIMARY COOLANT SYSTEM PRESSURE 2.3 LIMITING SAFETY SYSTEM SETTINGS -REACTOR PROTECTIVE SYSTEM Table Reattor Protective System Trip Setting Limits 3.0 LIMITING CONDITIONS FOR OPERATION 3.0 APPLICABILITY . . 3. l PRIMARY-COOLANT SYSTEM Operable Components

3. L l *Figure 3-0 3. l. 2 Figure 3-1 Figure 2

• Figure 3-3 3. l. 3 3. l.4 3. l.5 3. l.6 Reactor Inlet Tempetac*ure vs Operating Pressure*

Heatup Cooldown Rates

• Pressure -Temperature Limits for Heatup Pressure Limits for Cooldown Pressure -Temperature Limits for Hydro Test Minimum Conditions for Criticality Maximum Primary Coolant Radioactivity Primary Coolant System Leakage Limits Maximum Primary* Coolant Oxygen and Halogens.

Concentrations 3.1.7 Primary and Secondary Safety Valves ..........

es P ct 3.1.q 1.t.-f40WV\

Coo\; YI 3. 2 CBEMICAL AND LUME CONTROL SYSTEM

• 3

• 3 EM!ltG!NCY CORE SYSTEM 3.4 CONTAINMENT COOLING 3.5. STEAM AND FEEDWATER SYSTEMS 3.6 CONTAINMENT SYSTEM 3.7 ELECTRICAL SYSTEMS 3 *,-8 ---* * -* --REFUELING OPERATIONS

-.. 3. 9 EFFLUENT RELEASE (DELETED) . i PAGE 1-1 1-1 1-3 1-3 1-4 2-1 2-1 2-3 2-4 2-5 03 3-1 3-1 3-lb 3-lb 3-3a. 3*4 3-9 3-10 3-11 3-12 3-17 3-20 3-23 3-25 3-26 3-29 3-34 3-38 3-40 3-41 3-46 3-50 . Amendment No. Jl, 7, 8J, c: tH, , . TSP1088-0181-NL04

• NEW

/ '* ,,( 3. 1. PRIMARY COOLANT SYSTEM (PC.S) (Continued)

SHUTDOWN COOLING -This section only applies with fuel in the \

,..

., . a. PCS Temperature

>200°F and <325°F At least two of the or trains listed below shall be operable and at least one loop or train shall be in operation:

1. Primary Coolant System Loop 1 consisting of an operable Steam Generator and at least one operable Primary Coolant Pump (PCP). 2. Primary Coolant System Loop 2 consisting of an operable Steam Generator and at least one operable Primary Coolant Pump (PCP). 3. Shutdown Cooling Train A. 4. Shutdown Cooling Train B. EXCEPTION:

All PCPs and Shutdown Cool fog mar be intentionally secured" provided:

AC::TION a. No operations are permitted that w:ould _cause *reduction of the PCS boron concentration, AND Core outlet tempe.rature

• stays at least 10°F belOw sat.uration ) } 1 A. If only 1 PCS, Loop is operable and no SDC trains are operable: ) 1. Immediately initiate corrective action to -return a' . second loop or train to operable -st.atus. B. If only 1 *snc train is operable and no PCS loops are ope.rable:

1. Immediately initiate corrective action to return a* second loop or train to operable status, AND . ' *z:-If a second loop or train cannot be returned to operable status be less*. than 200°F within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. -G.-If noPCS.loops,or.

S_hytdoW!J.

Cooling trains are in operation when required:

• * .. 1. Immediately suspend all operations involving a reduction in PCS boron concentration, AND Z:-Immediately initiate corrective action .to return the required loops or trains to operation.

_,,,,* 3-25c* Amendment No. / TSP0689-0140-NL04 f / ,.,," / / t: I l

• i . ,/ ! I I I -\ I j l i ! I -/ ' I ..

PA&!? .. 3.1. . PRIMARY COOLANT SYSTEM (PCS) (Continued) ,r,. 3.1. 9 SHUTDOWN COOLING (Continued) . b. PCS TemJ)erature Loops Filled At least one of the loops or trains listed below shall be operable and in operation and one additional loop or train shall be operable or the secondary side water level of each steam generator shall be higher than.minus 84%: 1. Primary Coolant System Loop l consisting of an oper*able Steam Generator.

and* at least one Primary Coolant Puinp (PCP)*. 2. Primary Coolant System ioop 2 consisting of an operable Steam Generator and at least one operable Primary Coolant Pump (PCP). 3. Shutdown Cooling Train A. 4. Shutdown Cooling Train B. EXCEPTION: .All PCPs and Sh.utdown Cooling may be intentionally secured *' . *' provided: . . a. No operations*

are perm;ltt'ed that would cause reduction of the PCS boron concentration, AND b:"'"'" Core outlet temperature does not exceed 200°F

• ACTION A. If only one PCS loop or SDC train is operable when two a:re required:

1. Immediately .initiate corrective action to return the required loops or trains to operable status. B. If a required Steam Gene*rator

'has less than the specified water level: 1. Immediately initiate corrective action to restore the required Steam Generator water C. If no PCS loops or Shutd .. own Cooling trains are in *operation when** required:

---

* -* 1. Immediately suspend all operations involving a reduction in PCS boron concentration, AND Immediately initiate corrective action to return the *required loops or trains to operation.

3-25d Amendment Ne:: __ __,/ . TSP0689-0140-NL04 3.1. 3. 1. 9 ***

• PRIMARY COOLANT SYSTEM (PCS) (Continued)

SHuTDOWN COOLING (Continued):

--c. PCS Temperature

-Loops not filled Two Shutdown Cooling trains (SDC) shall be operable, and at least one train shall be in operation.

EXCEPTIONS:

1. One SDC train may be intentionally rendered inoperable for testing or maintenance provided:

a.

• The other SDC train is in operation.

2. All Shutdown Cooling may be intentionally secured . provided:

ACTION A. B. a. No* operations are permitted that would cause reduction of the PCS boron concentration, AND b. Core outlet temperature does not exceed 200°F *. If only one* SDC train is operable when two are required:

1. Immediately initiate.

corrective action to return two trains to operable status. ,_. If no SDC trains are in operation when Immediately suspend all operations involving a reduction in PCS boron" concentration, Immediately initiate corrective action to return the required trains to operation.

3-25e ...... --------*-. Amendment.

No. --------------------

TSP0689-0140-NL04

)*

" '*' NEvvtft&-6" ( 3.1. (Continued)

3. L9 SHUTDOWN COOLING (Continued)

A shutdown cooling train may vary in actual component configuration, method of operation and control, but it shall always accomplish objective of transferring decay heat from the reactor to Lake Michigan as the ultimate heat sink. As a minimum, a shutdown cooling train requires:

a shutdown cooling pump, one component cooling .water pump, one service water pump, and appropriate piping, valves and controls for the equipment to perform its function.

All of this equipment must also have power to be operabl.e. "Loops filled" means the Primary .. Coolant. system (PCS) ioops are intact, not blocked by dams and totally filled with coolant. This permits partial draining of the PCS J>rovided air has not entered the PCS loops. The loops are considered "not filled" after the PCS has been drained so air has entered the loops and air sweeps have not been completed to remove the air. Once the PCS loops have been drained to any extent (install steam generator nozzle dams for example) there could be sufficient air trapped in the upper portion of the generator u-tubes, even after the PCS water level* is raised, to prevent natural circulation in the PCS. For this reason., the steam generators cannot.be considered.operable when the PCS loops are not completely filled with coolant and the air sweeps completed.

With the PCS temperature*

>200°F and <325°F a single primary coolant loop or shutdown cooling train provides sufficient heat removal capability for removing decay heat. Natural circulation is adequate for core heat removal, however it may not provide adequate mixing of the PCS coolant. during.PCS boron concentration changes.*

Therefore, forced circulation is required during these operating conditions, except during when the required loops_or trains can be intentionally rendered inoperable provided additional constraints are followed.

Single failure cons.iderations require a second loop or train .(either PCS or shutdown cooling) be operable.

With the PCS temperature

<200°F and the loops filled, a single primary coolant loop or shutdown cooling train provides sufficient heat removal capability for removing decay heat. The steam generators remove by bulk heating of the secondary side water rather than creating steam. Natural circulation is adequate as.a backup means for core heat removal, however it may not provide adequate mixing of the PCS coolant during PCS boron concentration changes. In additon, it* is difficult to maintain PCS temperature if the only method of core heat removal is natural circulation.

Therefore, forced circulation is required during these operating conditions, except during intervals when the required loops or trains can be intentionally_

secure.<L

_ .. . _ constraints are followed.

Single failure considerations require a second . --;'"'" . loop, train, or the secondary side water level of both steam generators

• be above minus 84%. A steam generator secondary water level of at least a minus 84% is sufficient to support natural circulation in the PCS. 3-25f . Amendment No. *-----* ------TSP0689-0140-NL04

'i " I

• NEW PA&b

• 3 .1. PRIMARY COOLANT SYSTEM (PCS) (Continued) 3.1. 9

• S-HtJTDOwN.

COOLING (Continued)

BASIS (Continued)

With the PCS temperature

S200°F and the loops not filled, a single shutdown cooling train provides sufficient heat removal capability for removing decay h*eat. To provide adequate mixing of the PCS coolant during PCS boron concentration changes, forced circulation is required during this operating condition except during intervals when the required trains can .be intentionally rendered inoperable provided additional constraints are followed.

Single failure considerations, and the unavailability of the steam generators as a heat removing component, require that a second shutdown train be operable.

All forced circulation may be isolated provided actions are taken to prevent . di.lution of the PCS and avoid situations that could produce steam in the reactor vessel. When the PCS temperature is >200°F and <325°F, subcooling ensures the availability of single phase natural circulation

• ..

• When the PCS temperature is :S200°F, not exceeding.

200°F ensures the availability of a single phase natural circulation.

A redundant train*of SDC may be intentionally rendered iri.operable for testing or maintenance for any time interval provided the other SDC train is in operation.

No til!le limit is specified because the time interval that is needed for each required evolution could This method of . operating equipment is consistent.with the intent-of Genetic Letter 88-17, . Loss of Decay*Heat Removal. It is recommended that equipment be maintained and tested as appropriate to create an* acceptable level of confidence that the systems* will be able to perform their decay heat removal function.

Therefore,appropriate testing or maintenance is considered prudent and justified, without any specific time limit related to that may. be inoperable to permit such evolutions.

In all cases, the intent is to take reasonable actions to minimize the use of exception No. l of

• specification 3.1.9.c. If it is required to exception l of specification 3.1.9.c, SDC will not be rendered inoperable in* situation.a where PCS temperature is close to 200°F or the. PCS heatup rate would result in the PCS temperature exceeding 200°F in a relatively short period of time. . .* ---"4'-"'Sg Ainendment No. TSP0689-0140-NL04

• NEW PA&L::

• l;l 3.7 ELECTRICAL SYSTEMS (Continued) .

3 . . SHUTDOWN COOLING EI.ECTRICAL REQUIREMENTS )NSE/2T With the primary coolant system at <325°F, and with fuel in the reactor, the shutdown cooling train(s) shall be electrically powered as follows

a. If one train of shutdown cooling is required to meet specification

1. The appropriate engineered safeguards bus (lC or lD) shall be operable and capable of being supplied by offsite power and an operable diesel generator.

OR 2. Have two trains of shutdown cooling operable, and meet all the requirements of 3.7.3.b below. b. If two trains of shutdown cooling are required to meet specification 3.1.9, one engineered safeguards bus , (lC or lD) shall be operable and capable of being supplied*by offsite power while the other engineered safeguards bus CID.or lC) is operable and capable of being supplied by an operable diesel generator.

ACTION With less than the required electrical sources operable:

• A. Immediately initiate action to suspend core alterations, AND B. Immediately initiate action to suspend movement of irradiated fuel,, AND C. Immediately suspend crane operations over irradiated fuel, AND D. Suspend operations With a for draining the PCS or fuel po(!l, AND Initiate action to restore the required elect_rical sources to operable.

status. 3-45a I Amendment No. ...J TSP0689-0140-NL04 I --_,,.'

1VEW

'; " "-, .. .:'. "...>>( 3. 7 ELECTRICAL SYSTEMS (Continued) .7-.-3------SHU'l'D_QWN COOLING ELECTRICAL REQUIREMENTS (Continued)

--*----------------* --------Basis ------The operability of the minimum specified power sources and associated distribution systems during shutdown and refueling ensures that: -1. The plant can be maintained in the-shutdown or refueling mode for extended time periods, and 2-. Sufficient control capability is available for maintaining plant status. When a single train of shutdown cooling must be operable to the minimum equipment operability requirements to remove decay heat, that train must still function following the loss of one electric supply (offsite or diesel generator).

When two.trains of shutdown'cooling must be operable to meet the minimum equipment operability requirements to remove decay heat, the loss of any single pump or the loss of one electrical supply (offsite or die_sel generator) must still leave a shutdown .cooling train operable.

.-The action statements will minimize the.occurrence of postulated events, however, they should-not preclude the'orderly completion of an activity, such as fuel movement or crane operation, in order to get into a s*afe and conseriative position.

-" Amendment No. TSP0689-0140-NL04

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Table 4.2.2 (Contd) Minimum Frequencies for Equipment Tests 12. Iodine Removal System 13,. The Iodine Removal System shall be operable:

a. At least once per 31 days by verifying each valve (manual, power operated or automatic) in flow path that is not locked, sealed or otherwise secured in position, *is its correct.position.

b. At least once per 6 months by: c. 1. Verifying that tanks T-102 and T-103 contain the minimuDl required volumes. 2. Vedfying the concentration of hydrazine in .T-102 and sodium. hydroxide in T-103. At least once per refueling cycie, during shutdown, .by verifying*

that each automatic valve in the flow path* actuates to its correct posi.tion.

Containment Purge and Ventilation Isolation Valves

• The Containment Purge and Ventilation.

Isolation Valves shall be determined closed: a. At least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> by* checking the valve .indicator in the control room b. At least once every 6 months by performing a leak rate test between th* valves. 14. Steam Generator Secondary Water Level For any steam generator required to meet the shutdown cooling requirements of specification 3.1.9, its secondary water level shall be verified at least once p'er 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> to be above minus -----., ----4-15b TSP0985-0270-NL04