ML040960342

Draft - Written (RO & SRO) W/Answer Key

ML040960342
Person / Time
Site:	Calvert Cliffs
Issue date:	03/05/2004
From:	Sickle J Constellation Nuclear
To:	Conte R NRC/RGN-I/DRS/OSB
Conte R
References
50-317/04-301, 50-318/04-301
Download: ML040960342 (233)

Text

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DC Sources-Operati ng 3 3.8.4 B 3.8 ELECTRICAL POWER SYSTEMS I

B 3 . 8 . 4 DC Sources-Operating BASES BACKGROUND The station DC sources provide the AC emergency power system w i t h control power. I t also provides both motive and control power t o selected safety related equipment and preferred AC vital bus power (via inverters). As required by Reference 1, Appendix l C , Criterion 39, the DC e l e c t r i c a l 1 power sources are designed t u have sufficient independence, redundancy, and testabi 1i t y t o perform their safety functions, assuming a single failure. The DC sources a l s o I

conform t o the recommendations of References 2 and 3 .

The 125 VDC electrical power sources consist of four independent and redundant safety related Class 1E DC channels. Each channel consists of one 125 VDC battery, the associated battery charger for each battery, and a l l the associ ated control equipment and i nterconnecti ng cab1 i ng.

During normal operation, the 125 VDC load i s powered from the battery chargers w i t h the batteries floating on the system. In cases where momentary loads are greater than the charger capability, or a loss of normal power t o the battery charger, the DC load is automatically powered from t h e station batteries.

The DC channels provide the control power for i t s associated Class 1E AC power load group, 4.16 kV switchgear, and 480 V load centers. The DC channels a l s o provide a DC source t o the inverters, which i n turn power the AC v i t a l buses.

The DC sources are described i n more detail i n ' the Bases for LCO 3.8.9 and for LCO 3.8.10. . I Each battery has adequate storage capacity t o carry the required load continuously for a t least 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> and t o carry load duty cycle as discussed i n Reference 1, Chapter 8. 1 Each 125 VDC battery i s separately housed i n a ventilated room apart from i t s charger and distribution centers. Each channel i s separated physically and electrical l y from the other channel t o ensure that a single f a i l u r e i n one channel I does not cause a f a i l u r e i n a redundant channel. There i s

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CALVERT CLIFFS - UNITS 1 & 2 B 3.8.4-1 -Revision 2

DC Sources-Operating r.

B 3.8.4 BASES no sharing between redundant Class 1 E channels, such as batteries, battery chargers, or distribution panels.

The batteries f o r DC channels are sized t o produce required capacity a t 80% o f nameplate rating; corresponding t o warranted capacity a t end of l i f e cycles and the 100% design demand. Battery size is based on 125% o f required capacity.

An average voltage of 2.13 V per cell , corresponds t o a total minimum voltage o u t p u t of 125 V per battery (128 V f o r the reserve battery) as discussed in Reference 1, Chapter 8. I The c r i t e r i a for sizing large lead storage batteries are defined in Reference 4. I Each DC channel has ample power o u t p u t capacity f o r the steady s t a t e operation o f connected loads required d u r i n g normal operation, while a t the same time maintaining i t s battery bank f u l l y charged. Each battery charger also has sufficient capacity t o restore the battery from the design minimum charge t o 95% of i t s f u l l y charged state within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> while supplying normal steady s t a t e loads discussed in Reference 1, Chapter 8. I

-APPLICABLE _ _ -.The- i n i t i a l cgnditLons-of DBA and-tr3nsien.t analyses i_n SAFETY ANALYSES Reference 1, Chapters 6 and 14, assume t h a t ESF systems are OPERABLE. The DC channels provide a normal and emergency DC sources for the DGs, emergency auxiliaries, and control and switching during a l l MODES o f operation. I The OPERABILITY o f the DC sources i s consistent w i t h the i n i t i a l assumptions of the accident analyses and i s based upon meeting the design basis of the unit. This includes maintaining the DC sources OPERABLE duri ng acci dent conditions i n the event of:

a. An assumed loss of a l l o f f s i t e AC power or a l l onsite AC power; and

b. A worst case single failure.

The DC sources satisfy 10 CFR 50.36(c)(Z)(ii), Criterion 3 .

LCO The DC channels, each channel consisting of one battery, one battery charger, and the corresponding control equipment and interconnecting cab1 i n g supplying power to the associated CALVERT CLIFFS - UNITS 1& 2 B 3.8.4-2 Revision 2

DC Sources-Operating B 3.8.4 BASES

)

bus, are required t o be OPERABLE t o ensure the avai 1abi 1 i t y of the required power t o shut down the reactor and maintain i t i n a safe condition a f t e r an A00 o r a postulated DBA.

Loss o f any DC channel does not prevent the minimum safety l

function from being performed (Reference 1, Chapter 8). . 1 An OPERABLE DC channel requires the battery and one OPERABLE charger t o be operating and connected t o the associated DC bus (es) .

A battery charger i s considered OPERABLE as long as i t i s receiving power from i t s normal o f f s i t e source and can be connected t o a DG w i t h i n 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> following an event.

APPLICABILITY The DC sources are required t o be OPERABLE i n MODEs 1, 2, 3 , I and 4 t o ensure safe u n i t operation and t o ensure that:

a. Acceptable fuel design limits and reactor coolant pressure boundary limits a r e not exceeded as a r e s u l t of AOOs or abnormal transients; and

b. Adequate core cooling i s provided, and containment integrity and other vital functions are maintained i n the event of a postulated DBA.

ACTIONS The DC sources requirement f o r MODEs 5 and 6 aye addressed i n the Bases for LCO 3.8.5.

A. 1 I

Required Action A . l requires the inoperable battery t o be replaced by the reserve battery w i t h i n four hours when one DC channel i s inoperable due t o an inoperable battery and the reserve battery i s available. The reserve battery i s a qualified battery that can replace and perform the required function of any inoperable battery. The four hour Completion Time i s acceptable based on the capability o f the reserve battery and the time i t takes t o replace the inoperable battery w i t h the reserve battery while minimizing the time i n this degraded condition.

B. 1 Condition B represents one channel w i t h a loss o f a b i l i t y t o completely respond t o an event, and a potential loss o f CALVERT CLIFFS - UNITS 1 81 2 B 3.8.4-3 Revision 2

DC Sources-Operating *,

B 3.8.4 BASES abi 1i t y t o remai n energi zed d u r i n g normal operati on.

Therefore, i t i s imperative that the operator's attention focus on stabilizing the u n i t , minimizing the potential f o r complete loss of DC power to the affected channel. The 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> limit i s consistent w i t h the allowed time for an inoperable DC channel .

If one of the required DC channels i s inoperable for reasons other than Condition A (e.g., inoperable battery, inoperable battery charger(s), or inoperable battery charger and associ ated inoperable battery), the remaini ng DC channel s have the capacity t o support a safe shutdown and t o mitigate an accident condition. Since a subsequent worst case single f a i l u r e would, however, result i n the further loss of the 125 VDC channels w i t h attendant loss o f ESF functions, continued power operation should not exceed 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />. The 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> Completion Time i s based on Reference 5 and r e f l e c t s a reasonable time t o assess u n i t s t a t u s as a function of the I

inoperable DC channel and, i f the DC channel i s not restored t o OPERABLE status, to prepare t o effect an orderly and safe uni t shutdown.

C.1 and C.2 If the inoperable DC channel cannot be restored t o OPERABLE s t a t u s w i t h i n the required Completion Time, the u n i t must be brought t o a MODE i n which the LCO does not apply. To achieve this status, the u n i t must be brought t o a t l e a s t MODE 3 w i t h i n 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and t o MODE 5 w i t h i n 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />. The a1 1owed Completion Times are reasonable, based on operating experience, t o reach the required u n i t conditions from f u l l power conditions i n an orderly manner and w i t h o u t challenging u n i t systems. The Completion Time t o bring the u n i t t o MODE 5 is consistent w i t h the time required i n Reference 5. I SURVEILLANCE SR 3.8.4.1 REQUIREMENTS Veri fyi ng battery terminal voltage whi 1e on f l o a t charge helps t o ensure the effectiveness o f the charging system and the a b i l i t y of the batteries t o perform t h e i r intended function. Float charge i s the condition i n which the charger i s supplying connected loads and the continuous CALVERT CLIFFS - UNITS 1& 2 B 3.8.4-4 Revision 2

DC Sources-Operati ng B 3.8.4 BASES i

charge required t o overcome the internal losses o f a battery and maintain the battery i n a f u l l y charged s t a t e . The voltage requirements are based on the nominal design voltage of the battery (2.13 V per cell average) and are consistent w i t h Reference 6 and the i n i t i a l s t a t e o f charge conditions assumed i n the battery sizing calculations. The 7 day 1

Frequency i s conservative when compared w i t h manufacturer recommendations and Reference 6. I SR 3.8.4.2

. Visual inspection t o detect corrosion of the battery c e l l s and connections, o r measurement of the resistance of each cell t o cell and terminal connection, provides an indi cation of physical damage o r abnormal deterioration that could potenti a1 l y degrade battery performance.

The limits established f o r t h i s SR must be no more than 20%

above the resistance as measured during i n s t a l l a t i o n or n o t above the cei 1i ng value establ i shed by the manufacturer.

The SR Frequency f o r these inspections, which can detect I conditions that can cause power losses due t o resistance heating, is 92 days. This Frequency i s considered acceptable based on operating experience related t o detecting corrosion trends.

SR 3.8.4.3 Visual inspection of the battery c e l l s , cell plates, and battery racks provides an indication of physical damage o r abnormal deteri oration that coul d potenti a1 l y degrade battery performance.

The presence of physical damage or deterioration does not necessarily represent a failure of this SR, provided an evaluation determines that the physical damage o r deterioration does not affect the OPERABILITY of the battery ( i t s a b i l i t y t o perform i t s design function).

The 18 month Frequency i s based on engineering judgment. I Operating experience has shown that these components usual l y pass the SR when performed a t the 18 month Frequency.

I CALVERT CLIFFS - UNITS 1 & 2 B 3.8.4-5 Revision 2

DC Sources-Operati ng B 3.8.4 BASES Therefore, the Frequency was concluded t o be acceptable from a re1 i abi 1i t y standpoint.

SR 3.8.4.4 and SR 3.8.4.5 Vi sual inspecti on and resistance measurements o f cell t o cell and terminal connections provide an indication of physical damage or abnormal deterioration that could i ndi cate degraded battery condition. The anti -corrosion material i s used t o help ensure good electrical connections and t o reduce terminal deterioration. The v i sual inspection f o r corrosion is n o t intended t o require removal of and inspection under each terminal connection. The removal o f visible corrosion i s a preventive maintenance SR. The presence of visible corrosion does n o t necessarily represent a f a i l u r e o f this SR provided visible corrosion i s removed d u r i n g performance o f SR 3.8.4.4.

The connection resistance limits f o r SR 3.8.4.5 shall be no more than 20% above the resistance, as measured d u r i n g installation, or n o t above the ceiling value established by the manufacturer.

The 18 month Frequency f o r these SRs i s based on engineering judgment. Operating experience has shown that these I components usually pass the SRs when performed a t the 18 month Frequency. Therefore, the Frequency was concluded t o be acceptable from a r e l i a b i l i t y standpoint.

SR 3.8.4.6 This SR requires that each battery charger be capable of supplying 400 amps and 125 V for 2 30 minutes. These requirements are based on the output rating o f the chargers (Reference 1, Chapter 8). According t o Reference 7, the battery charger supply i s required t o be based on the I

largest combined demands of the various steady s t a t e loads and the charging capacity t o restore the battery from the design minimum charge s t a t e t o the f u l l y charged s t a t e ,

irrespective of the status of the u n i t d u r i n g these demand occurrences. The minimum required amperes and duration ensures t h a t these requirements can be satisfied. The t e s t i s performed while supplying normal DC loads or an equivalent or greater dummy load.

CALVERT CLIFFS - UNITS 1 & 2 B 3.8.4-6 Revision 2

DC Sources-Operating B 3.8.4 BASES I

The SR Frequency i s acceptable, given the u n i t conditions required t o perform the t e s t and the other administrative I

controls existing t o ensure adequate charger performance d u r i n g these 24 month intervals. In addition, this Frequency i s intended t o be consistent w i t h expected fuel cycle lengths.

SR 3.8.4.7 A battery service test is a special t e s t of battery

. capability, as found and w i t h the associated battery charger disconnected, t o s a t i s f y the design requirements (battery duty cycle) of the DC source. The t e s t duration must be 2 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> and battery terminal voltage must be maintained 2 105 volts during the t e s t . The discharge r a t e and t e s t length should correspond t o the design accident load (duty) cycle requirements as specified i n Reference 1, Chapter 8.

A dummy l o a d simulating the emergency loads o f the design I

d u t y cycle may be used i n lieu of the actual emergency-1oads.

The SR Frequency of 24 months i s consistent w i t h expected I fuel cycle lengths.

T h i s SR i s modified by a Note. The Note a/lows t h e performance of a modified performance discharge t e s t i n l i e u of a service t e s t . T h i s substitution i s acceptable because a modified performance discharge t e s t represents a more severe test of battery capacity than SR 3.8.4.7.

SR 3.8.4.8 A battery performance discharge t e s t is a t e s t o f constant current capacity o f a battery a f t e r having been i n service, t o detect any change i n the capacity determined by the acceptance t e s t . The t e s t i s intended to determine overall battery degradation due t o age and usage.

A battery modified performance discharge t e s t i s a simulated duty cycle consisting of just two rates; the one minute r a t e published f o r the battery o r the largest current load o f the duty cycle, followed by the t e s t r a t e employed f o r the performance discharge t e s t , both of which envelope the duty CALVERT CLIFFS - UNITS 1 & 2 B 3.8.4-7 Revision 2

DC Sources-Operating 3 3.8.4 BAS E S cycle of the service t e s t . Since the ampere-hours removed by a rated one minute discharge represents a very smal 1 p o r t i o n of the battery capacity, the test r a t e can be changed t o that for the performance t e s t without compromising the results of the performance discharge t e s t .

The battery terminal voltage f o r the modi f i ed performance discharge t e s t should remain above the minimum battery terminal vol tage speci f i ed i n the battery performance discharge t e s t for the duration o f time equal t o t h a t o f the performance discharge t e s t .

A modified performance discharge test i s a t e s t of the battery capacity and i t s a b i l i t y t o provide a h i g h rate, short duration load (usually the highest r a t e o f the duty cycle). T h i s w i l l often confirm the battery's a b i l i t y t o meet the c r i t i c a l period o f the load duty cycle, i n addition t o determining i t s percentage of rated capacity. Ini ti a1 conditions for the modified performance discharge t e s t should be identical t o those specified f o r a service t e s t .

Either the battery performance discharge t e s t or the modi f i ed performance d i scharge t e s t i s acceptable for satisfying SR 3.8.4.8; however, only the modified performance discharge t e s t may be used t o s a t i s f y SR 3.8.4.8 while satisfying the requirements of SR 3.8.4.7 a t the same time.

The acceptance c r i t e r i a for this SR are consistent w i t h References 6 and 4. These references recommend that the battery be replaced i f i t s capacity i s below 80% of the manufacturer rating. A capacity of 80% shows that the I

battery rate of deterioration i s increasing, even i f there i s ample capacity t o meet the load requirements.

The SR Frequency for this test i s normally 60 months. If the battery shows degradation, or i f the battery has reached 1

85% of i t s expected l i f e and capacity i s < 100% of the manufacturer's rating, the SR Frequency i s reduced t o 12 months. However, i f the battery shows no degradation b u t I

has reached 85% of i t s expected l i f e , the SR Frequency i s only reduced t o 24 months for batteries that retain capacity I

2 100% of the manufacturer's rating. Degradation i s indicated, according t o Reference 6, when the battery capacity drops by more t h a n 10% relative t o i t s capacity on 1

CALVERT CLIFFS - UNITS 1 & 2 B 3.8.4-8 Revision 2

DC Sources-Operating 6 3.8.4 BASES i

the previous performance t e s t or when i t i s 2 10% below the manufacturer's rating. These Frequencies are consistent with the recommendations i n Reference 6. I REF ERE NCES 1. UFSAR

2. Safety Guide 6, Revision 0, "Assumptions Used f o r Eva1 uating the Potenti a7 Radi ol ogi cal Consequences o f a Steam Line Break Acci d e n t f o r Boi 1i ng Water Reactors, I' March 1971

3. IEEE Standard -308-1978, "IEEE S t a n d a r d Criteria f o r Class 1E Power Systems f o r Nuclear Power Generating Stations"

4. IEEE Standard -485-1983, IIRecommended Practice f o r Sizing Large Lead Storage Batteries for Generati ng Stations and Substations (ANSI) ,I1 June 1983

5. Regul atory Gui de 1.93, "Avai 1abi 1 it y of E7 e c t r i c Power Sources, I' December 1974

6. IEEE Standard -450-1995, "IEEE Recommended Practice f o r Maintenance, Testing, and Replacement of Vented Lead-Acid Batteries f o r Stationary Applications," May 1995 7 Regulatory Guide 1.32, Revision 2, "Crit e r i a for Safety-Re1 ated El e c t r i c Power Systems f o r Nuclear Power P1 ants ,'I February 1977 I

CALVERT C L I F F S - UNITS 1 & 2 5 3.8.4-9 Revision 2

L T EOP-8 Rev 26lUnit 1 Page 28 of 54 VI. RESOURCE ASSESSMENT TABLE i

SAFETY FUNCTION SUCCESS PATH DETERMINATION WACTIVITY ZONTROL RESOURCE ACCEPTANCE SUCCESS PATH CONDITIONS CRITERIA 3C-I : CEA Insertion a. CEAs are able to be inserted, 1. NO more than ONE and SUR is negative CEA NOT fully inserted, W R N l power is lowering, OR OR

b. A loss of ALL Vial 4KV Buses may have occurred 2. WRN1 power below 104%

and SUR is negative or zero xc-2: Boration using a. Charsing pump I. Baration rate greater fnan cvcs is available for or equal to 40 GPM, boron addition WRNl power is lowering, and SUR is negative b, Boric acid source is available: OR - .

BAST 2. WRNl power below 104%

RWT and SUR is negative or zera

c. Charging path is available via normal flow path or SIS flow path RC-3: Boration Using a. HPSI pump is available I.Boration rate greater than SIS for boron addition or equal to 40 GPM, WRNI power is lowering,

b. RWT is available as and SUR is negative boric acid source OR

c. A flow path is available

2. WRNl power below 104%

2nd SUR is negative or zerc i

EOP-8 Rev26Nnit 1 Page 29 of 54 I. RESOURCE ASSESSMENT TABLE SAFETY FUNCTION SUCCESS PATH DETERMINATION TAL UXILIARIES RESOURCE ACCEPTANCE UCCESSPATH CONDllYONS CRITERIA 4-1: 500KV Offsite a. At least ONE 500KV Bus I.At least ONE 4KV vital Power is available bus is energized 2.11,12,21 and 22 125V DC Buses, ALL greater than 105 volts 3.At least THREE 120V AC Vital Buses are energized:

11 12 13 14

4. EITHER 1YO9 or 1Y10 is energized (A-2: Diesel a. IA, I 9 OR OC 1. At least ONE 4KV vital Generators Diesel Generator bus is energized is available 2.11,12,21 and 22 125V DC Buses, ALL greater than 105 volts

3. At least THREE 120V AC Vital Buses

' are energized:

I1 12 13 14

4. EITHER 1YO9 or 1Y10 is energized (continue)

EOP-t Rev 26/Unit '

Page 30 of 5L VI. RESOURCE ASSESSMENT TABLE SAFETY FUNCTION SUCCESS PATH DETERMlNATION VITAL AUXILIARIES (continued) RESOURCE ACCEPTANCE SUCCESS PATH CONDITIONS CRITERIA VA-3: SMECO a. SMECO Power Supply 1. At least ONE 4KV vital System is available bus is energized

2. lly 12y21 and 22 125V DC Buses, ALL greater than 105 volts

3. At least THREE 120V AC Vital Buses are energized:

11 12 13 14

4. EITHER 1YO9 or 1Y10 is energized

EOP-8 Rev 26Nnit 1 Page 31 of 54 fl. RESOURCE ASSESSMENT TABLE SAFETY FUNCTION SUCCESS PATH DETERMINATION tCS PRESSURE 4ND INVENTORY ZONTROL RESOURCE ACCEPTANCE SUCCESS PATH CONDITIONS CRITERIA '

- cvcs

I a. Charging pump 1. Pressurizer pressure less than the upper limits of is available Att. (I)

b. Charging path is available via normal flow path or 2. Pressurizer level greater SIS flow path than 30 inches

c. A charging source is 3. RCS subcooling is between available: 25°F and 140°F based on CET temperatures 0 VCT BAST 4. RVLMS indicates level 0 RWT above the top of the hot le$

d. A method of pressurizer pressure control is available:

0 Pressurizer heaters 0 Main Spray 0 Aux Spray 0 Controlled Steaming

e. SlAS has NOTactuated OR has been reset

'IC-2: PORVs or a. PORV or Pressurizer 1. Pressurizer pressure Pressurizer Vent required to less than 2400 PSlA Vent reduce pressure 2.Pressurizer pressure less

b. PORV or Pressurizer than the upper limits of Vent available to Att. (I) controt pressure

3. RCS subcpoling is between

c. Charging and letdown 25°F and 140°F based on .

and/or SIS is available CET temperatures to control pressurizer level

4. Pressurizer level greater

d. Once-Through-Cooling than 30 inches (90) is NOT in progress

5. RVLMS indicates level above the top of the hot leg (continue)

EOP-8 Rev 26Nnit 1 Page 32 of 54 JI. RESOURCE ASSESSMENT TABLE SAFETY FUNCTION SUCCESS PATH DETERMINATION W S PRESSURE 4ND INVENTORY ZONTROL continued) RESOURCE ACCEPTANCE SUCCESS PATH CONDITIONS CRITERlA

'IC-3: LOSSOf a. A loss of ALL 4KV Vital 1. Pressurizer pressure less Vital AC Buses has occurred than the upper limits of Att. (I)

b. SIAS has NOTactuated OR has been reset 2.RCS subcooling greater than 25°F based on CET temperatures (1)

OR CET temperatures less than 50°F superheated (1) 3.RVLMS indicates the core is covered P I C 4 SIS a. SlAS has actuated 1. IF RAS has NOT occurred, OR SIS is able to be used AND pressurizer pressure ib to supply RCS makeup greater than 1270 PSIA, THEN at least ONE Charging Pump operating

2. HPSl and LPSI Pumps a r e injecting water into the RCS PER Atts. (10) and (1 1) (2) (:

3. RVLMS indicates the core is covered

{I) Refer to Attachment (12)to read CETs while vital AC buses a r e de-energized.

(2) Limits in Attachments (IO) and (II )are not required to be met if SIS throttle criteria are met.

(3) LPSI Pumps a r e NOT required post-RAS.

Rev 26/Unit 1 Page 33 of 54 rl. RESOURCE ASSESSMENT TABLE SAFETY FUNCTION SUCCESS PATHDETERMINATION

ORE AND RCS EAT REMOVAL RESOURCE ACCEPTANCE iUCCESS PATH CONDITIONS CRITERIA

~~

tR-I: S/G Heat Sink a. At least ONE S/G level 1. At least ONE S/Ghas Wtth NO SIS greater than (-1350inches level between (-124 inches Operation and (+)30 inches

b. Feedwater is available:

OR 0 Main Feedwater AFW S/G level is being restored 0 Booster Pump Injection by feedwater flow

c. SlAS has NOT actuated 2.IF RCPs are operating, OR has been reset THEN THOTminus TCOLD is less than. 1qF

d. SIS operation NOT required

3. IF RCPs are NOT operating THEN THOT minus TCOLD is less than 50°F

4. RCS subcooling greater than 25°F based on CET temperatures (1)

5. RVLMS indicates level above the top of the hot leg I) Refer to Attachment (12) to read CETs while vital AC buses are de-energized.

(continue)

~~

EOP-8 Rev26Nnit 1 Page 34 of 54 if. RESOURCE ASSESSMENT TABLE S A F W FUNCTJON SUCCESS PATH DETERMlNATlON

ORE AND RCS

+EAT REMOVAL

'continued) RESOURCE ACCEPTANCE SUCCESS PATH CONDlTiONS CRITERIA iR-2: SG Heat Sink a. At least ONE S/G level I. At least ONE S/G has With SIS greater than (-1350inches fevel between Operation 0 inches and (+)38inches

b. Feedwater is available:

OR 0 Main Feedwater AFW S/G level is being restored Booster Pump Injection by feedwater flow

c. SlAS has actuated or 2. CET temperatures less SIS operation required than 50°F superheated (1)

3. IF RAS has NOT occurred, AND pressurizer pressure is greater than I270 PSIA, THEN at least ONE Charging Pump operating

4. HPSl and LPSI Pumps are injecting water into the RCS PER Atts. (1 0) and (11) (2) (3 (1) Refer to Attachment (12) to read CTs while vital AC buses are de-energized.

(2) Limits in Attachments (I0) and (I) are not required to be met if SIS throttle criieria are met.

(3) LPSI Pumps are NOT required post-RAS.

(continue)

EOP-8 Rev 26/Unit Z Page 35 of54 rll. RESOURCE ASSESSMENT TABLE SAFETY FUNCTION SUCCESS PATH DETERMINATION CORE AND RCS HEAT REMOVAL (continued) RESOURCE ACCEPTANCE SUCCESSPATH CotJDinoNs CRITERIA HR-3: Shutdown a. CET temperatures less I.CET temperatures less .

Cooling than 300"F than 300°F and less system than 50°F superheated (1)

b. Radiation levels are low enough to allow valve 2. HPSl Pumps are injecting repositioning water into the RCS PER Att. (10) (2) 3.Pressurizer pressure less than 270 PSIA (245)

4. RVLMS indicates the core is covered R-4: Once-Through- a. HPSl pumps are available I. CET temperatures less Cooling than 50°F superheated (1)

b. BOTH PORVs are available

2. IF RAS has NOT occurred,

c. Flow path is available AND HPSI throttle criteria are NOT met,

d. RWT is available as a THEN ALL available makeup source Charging Pumps operating

3. HPSl and LPSl Pumps are injecting water into the RCS PER Atts. (I 0) and (I 1) (2) (3

4. Pressurizer pressure less than 1270 PSIA, OR is lowering (1) Refer to Attachment (12) to read CETs while vital AC buses are de-energized.

(2) Limits in Attachments (I0) and (II) are not required to be met if SIS throttle criteria are met.

(3) LPSl Pumps are NOT required post-RAS.

I

EOP-8 Rev 26/Unit 1 Page 36 of 54

/Im RESOURCE ASSESSMENT TABLE

~ ~-

SAFETY FUNCTION SUCCESS PATH DETERMINATION

ONTAINMENT ZNVJRONMENT RESOURCE ACCEPTANCE iUCCESS PATH CONDITIONS CRITERIA

E-1: NO CIS a. Containment pressure 1. Containment pressure less than 2.8 PSIG less than 2.8 PSlG

b. CIS has NOT actuated .Z. Containment temperature OR has been reset less than 220°F (1)

c. Containment radiation 3. Containment radiation alarms are clear with alarms are clear with NO unexplained rise (2) NO unexplained rise (2)

1) NOT available if IYIO is de-energized.

2) NOT applicable if 00s due to loss of power.

(continue)

EOP-8 Rev 26Nnit 1 Page 37 of 54 VI. RESOURCE ASSESSMENT TABLE SAFETY FUNCTION SUCCESS PATH DETERMINATION CONTAINMENT WIRONMENT

ontinued) RESOURCE ACCEPTANCE UCCESSPATH CONDlTIONS CRITERIA E-2

Containment a. Containment pressure I. Containment pressure Isolation less than 4.25 PSlG less than 4.25 PSlG

b. CSAS has NOT actuated 2. ALL available Containment OR has been reset Air Coolers are operating with maximum SRW flow 3.ALL containment penetrations required to be shut have a n isolation valve shut

4. Hydrogen concentration less than 0.5% (1)

OR ALL available hydrogen recombiners are energized with Hydrogen concentratio less than 4.0% (I)

OR Hydrogen purge operation per Tech Support recommendation (1)

(I) Hydrogen concentration acceptance criteria may be omitted until Chemistry has been able to place hydrogen monitors in service.

(continue)

EOP-8 Rev 26IUnit Page 38 of 54

11. RESOURCE ASSESSMENT TABLE SAFETY FUNCTION SUCCESS PATH DETERMINATION XINTAINMENT ., .*

5NVIRONMENT continued) RESOURCE ACCEPTANCE SUCCESS PATH CONDITIONS . CRITERIA

E-3: Containment a. Containment pressure I. Containment pressure spray greater than 4.25 PSIG less than 50 PSIG

2. ALL available containment Air Coolers are operating with maximum SRW flow '

3. Containment spray flow is greater than 1350 GPM per pump, ifoperating

4. ALL containment penetrations required to be shut have an isolation valve shut

5. Hydrogen concentration less than 0.5% (I)

OR ALL available hydrogen recombiners are energized with Hydrogen concentratior less than 4.0% (1)

OR Hydrogen purge operation per Tech Support recommendation ()I (1) Hydrogen concentration acceptance criteria may be omitted until Chemistry has been able to place hydrogen monitors in service.

EOP-8 Rev 261UnH 1 Page 39 of 54 rl. RESOURCE ASSESSMENT TABLE SAFETY FUNCTION SUCCESS PATH DETERMINATION WDIATION

.EVELS EXTERNAL

'0 CONTAINMENT RESOURCE ACCEPTANCE iUCCESS PATH CONDlTlONS CRITERIA 3LEC-I :Normal Levels a. Normal Radiation levels exist 1. Noble Gas Monitor outside of containment (1-RIC-5415) alarm clear with NO unexplained rise

b. Containment pressure less than 2.8 PSlG 2.Condenser Off-Gas RMS (I-RI-?752) alarm clear

c. A loss of ALL Vital 4KV with NO unexplained rise (1)

Buses may have occurred 3.S/G B/D RMS (1-Rl4014) alarm clear with N O unexplained rise (I)

4. Main Vent Gaseous RMS (I-RE415) alarm clear with NO unexpiained rise (1)

I) NOT applicable if 00s due to loss of power.

(continue)

EOP-8 Rev 26/Uni 1 Page 40 of 54

1. RESOURCE ASSESSMENT TABLE SAFETY FUNCTION SUCCESS PATH DETERMlNATtON UDIATION

.EVESEXTERNAL 0 CONTAINMENT continued) RESOURCE ACCEPTANCE iUCCESS PATH CONDITIONS CRITERIA iLEC-2:Containment a. Radiation detected I. ALL of the following

. Isolated outside containment alarms are clear with NO unexplained rise:

OR Noble Gas Monitor Containment pressure (I-RIG547 5) greater than, 2.8 PSlG 0 Condenser Off-Gas RMS

(-RI-1752)

I 0 S/G B/D RMS

(-RI-4014)

I Main Vent Gaseous RMS (1-RI-54?5)

OR

2. ALL containment penetrations required to be shut have an isolation valve shut IF a tube rupture is identified in a S/G, 0 ALL release paths from the affected S/G to the environment are isolated 0 Affected S/G pressure less than 920 PSlA