ML20107E697
| ML20107E697 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 02/06/1985 |
| From: | PUBLIC SERVICE CO. OF COLORADO |
| To: | |
| Shared Package | |
| ML20107E678 | List: |
| References | |
| NUDOCS 8502250731 | |
| Download: ML20107E697 (42) | |
Text
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-*. Fort St. Vrain #1 Technical Specifications N Amendment Page 4.6-1 l .4.6 AUXILIARY ELECTRIC POWER SYSTEM - LIMITING CONDITIONS FOR l OPERATIONS l The following Technical Specifications apply to the l minimum OPERABLE equipment supplying electric power to the
-l . plant auxiliaries.
'-l - Objective l 'To' ensure that the capability.of' supplying-_ electric- 5
- l. po'wer to the plant auxiliaries:is maintained 1.by ' defining' ,
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- l- - the. minimum OPERABLE.^ equipment.
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+ Fort St. Vrain #1 Technical Specifications
', Amendment Page 4.6-2 l Specification LCO 4.6.1.1 -
Auxiliary Electric Power l System - Power Operation l Limiting Conditions for Operation l As a minimum, the following Auxiliary Electrical l sources and busses shall be OPERABLE: l a) Two physically independent A.C. circuits between l the off site transmission network and .the 480V [~ A.C. essential distribution system shall. be l OPERABLE including, l 1). The Reserve Auxiliary .Transt rmer (RAT) and l the Unit Auxiliary Transformer. (UAT). l l NOTE: .The UAT shall-be considered OPERABLE if l the Turbine Generator is on line with
'l . both.the Generator and the UAT-links in l . place or if the Generator links are .or l can be' removed within 4_h'ours during-l periods when the Turbine Generator 1 is l: off line. ,
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. Fort St. Vrain #1 Technical Specifications -% Amendment Page 4.6-3 l 2) 4160V A.C. Bus 18 and either 4160V A.C. Bus IA l or IC . These busses must also be energized l and tie breakers open between those busses l connected to independent off site electrical l power sources, except during switching l operations.
l 3) The auxiliary power 480V A.C. essential Busses l 1A, IB, and 1C . These busses must also be l energized and tie breakers open between those l with separate electrical power sources, except l during sw' itching and/or d.iesel--generator l operation. 1 l b) Both diesel generator sets shall be OPERABLE with: l' 1) 325' gallons of fuel contained in;the diesel. l fuel oil day tank, .
.l 2)'A minimum- of 20,000 gallons of fuel: in-
-underground storage,-
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. l- 3)-'One fuel oil transfer ~ pump.from the-diesel ,
s: l- - -fuel oil storage-tank to'-the diesel _ fuel . oil
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l _ day tanks, p.
.l 4)-One starting . air compressor and receiver 'per -
l< diesel generatorfset, q
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a Fort St. Vrain #1 Technical Specifications s Amendment Page 4.6-4 l 5) One auxiliary boiler fuel oil pump OPERABLE l between the auxiliary boiler fuel supply and l the diesel fuel oil day tank (s), l 6. One water-jacket heater OPERABLE for each l diesel engine. l NOTE: The water-jacket heaters- may be l inoperable for up to 72 hours without l the . associated diesel engine being l considered inoperable. l c) The following non-interruptible 120V A.C. busses - l are OPERABLE:
-l 1) Non-interruptible A.C. Busses 1A~ and 1A-1, l energized from their- associa'ted inverter, ~
l connected to D.C. Bus'1A, and associated' l , alternate instrument power. transformer 1A-1, l . including '.the trans'fer' switch and connected g l cabling, - l 2) Non-interruptible- A.C. Busses 18 and 18-1, l . energized from their associated' inverter,. -
-l ' connected to -D.C. ; Bus IB, -and associated l , -alternate; instrument power -- transformer 1 B-1,' . ' v. .
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- Fort St. Vrain #1 Technical Specifications s, Amendment Page 4.6-5 l 3) Non-interruptible A.C. Busses 1C and IC-1, l energized from their associated inverter, l connected -to Battery IC, and associated l alternate instrument power transformer IC-1, l includir.g the transfer switch and connected l cabling, l d) The D.C. busses and electrical sources:
l 1) The following 125V D.C busses: l a) D.C. Bus IA energized from Battery 1A, l b) D.C. Bus IB energtzed 'from Battery,1B. l There shall be no closed connections between i the various D.C. sources.
- l. NOTE: One D.C. bus may be energized from an l alternate source and ~1ts associated l battery and charger -aligned 1.to'over l . charge the battery. for~'up. to 30 . hours:
l -without being considered inoperable ~ l '2) The followingL125V D.C. el'ectrical sources: 1l a) Battery.1A-and'BatteryChargerjlA,orf
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m li ' Battery IB ~ and Battery lChargerI1B,-'or b) e l ID,.
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Fort St. Vrain #1 Technical Specifications
'. Amendment Page 4.6-6 l c) Battery IC and Battery Charger IC, or l 10.
l NOTE: Battery Charger ID can only be l associated with one battery at: l
- any given time.
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Fort St. Vrain #1 Technical Specifications
. Amendment Page 4.6-7 i
l APPLICABILITY: POWER OPERATION l ACTION: s I a) Off Site Sources
.l 1) With either the RAT and 4160V A.C. Bus.B or l the UAT and 4160V A.C. Busses A and C l INOPERABLE,
[ a) Demo'nstrate the operability of the l remaining A.C. sources by performing
-l + the requirements of' SR 5.6.1.1.a) l - within .one hour an'd every 8 hours
-l thereafter, 'and SR 5.6.1.2.a)5).within-
- l. -one-hour unless the OPERABILITY.of the
-l diesel generator- ' set (s) .has been l confirmed: as spec'ified -within the-l~ previous 8' hours.
-l b) Restore :the required 4160V 1A.C.! bus.
il. 'within-12 hours or- be:in a- LOW- POWER l' . _ or- SHUTDOWN 'conditi,on Lwithin' the
-1 : subsequent 24 hours. .
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Fort St. Vrain #1 Technical Specifications
'. Amendment t
Page 4.6-8 l l c) Restore the required transformer to an l l OPERABLE status within 72 hours, or be l in a LOW POWER or SHUTDOWN condition l within the subsequent 24 hours. l b) Diesel Generator and 480V A.C. busses: l 1) With either. diesel generator set, or a 480V l A.C. essential businoperable;
- l. .a) Demonstrate the OPERABILITY of the off l site A.C. sources by performing.:the" l requirements of SR -5.6.1.1.a.'within l a one hour and every 8 hours thereafter, l 3 Jand, T-rl b) If~ Bus- A or C' inoperable,-demons'trate-l theOPERABILITYoftheremaining[ diesel'
'l generator set .and its-associated Bus 7
-l by, W Performing the .requirenIents of .
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l- SR 5.6'.1.2.a.5-within one hou'r: -sm
.<: .w l 'unless 'the~ OPERABILITY iof the' - U
.l. 7 'dieseligeneratori:setD has been N
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l ,- -confirmed as .specified within! ~ lL .the previous;8 hours;
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? l' .2) i.Verifyin'g the--Engine) Driven; Fire > ?:0
;l Pump is; OPERABLE.~ .g e u .;
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Fort St. Vrain #1 Technical Specifications
's Amendment Page 4.6-9 l 3) Verifying the Emergency-l Condensate header is OPERABLE.
l 4) Verifying all equipment supplied l by the OPERABLE diesel generator l set required for SAFE SHUTOOWN l COOLING is OPERABLE. (See FSAR l TABLES 8.2-4 and 8.2-5) l ., NOTE: The term " verify" as used l in this context means to l : administratively check by
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l examining logs or other l information to determine-l- if certain components. are l .out-of-service. .forf l , maintenance or other-l . reasons. It does not mean s l -to, perform- all the , l suryeillance? requirements
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l- .' associated 'with ' the
'l OPERABILITY -of the s c .*
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Fort St. Vrain #1 Technical Specifications
. Amendment 4
Page 4.6-10 l c) Restore the required 480V A.C. l essential bus within 12 hours or be in l a LOW POWER or SHUTDOWN condition l within the subsequent 24 hours. i-l d) Restore the diesel generator set to an i OPERABLE status within 72 hours, or be l in a LOW POWER or SHUTOOWN condition l within the< subsequent 24 hours. l 2) With one off site circuit and one diesel l l generator set inoperable, l a)- -Demonstrate the .0PERABILITY of the l remaining A.C. _ sources as in
~
l -4.6.1.1.b.1.iabove.
.l b) Restore at least one of the inoperable ' . e.
l A.C. sources to an OPERABLE.~ status- - l 'within 12 hours, o be in a~ LOW POWER l or SHUTDOWN ' condition 'within' the l subsequent 24 hours. 4,
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'l _c) Restore .the._ required A.C. electrical. -
.l sources within'72. hours from- the time s
l of.~the -initial loss or be in-a.. LOW l POWER'or SHUTDOWN condition within the , 4s % g,.
.I . subsequent 24 hours.
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Fort St. Vrain #1 Technical Specifications
'o Amendment Page 4.6-11 l 3) With both diesel generator sets inoperable, l a) Demonstrate the OPERABILITY of two l independent off site A.C. circuits- by l performing the requirements of l SR 5.6.1.1.a. within I hour and every 8 l hours thereafter.
Restore at.least one of the inoperable
~
l b) l diesel generator sets to an- OPERABLE l status > within 6 hours or be in a LOW
-l POWER or SHUTDOWN condition within the l subsequent 24 hours.
.l c) . Restore both diesel generator sets to l an.0PERABLE status within 72 hours from the time of the initial. loss or b'e in;a l
l LOW POWER or SHUTDOWN condition within
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'l the subsequent 24 hours.
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Fort St. Vrain #1 i Technical Specifications l . Amendment Page 4.6-12 l l l 4) Upon reaching the minimum underground fuel l storage quantity, I a) The auxiliary boiler (s) will be i shutdown within the subsequent 6 hours. l 5) Both boiler fuel oil pumps may be inoperable ' l for up to 24 hours if at least 5,500 gallons l of fuel oil are in the diesel oil storage l l tank, and both fuel oil transfer pumps between l the diesel oil storage tank and the day tanks l 7 are OPERABL.E. l c) 120V A.C. non-interruptible busses: l 1) With one -of the non-interruptible 120V~A.C. l busses not energized, l a) Re-energize ~the non-interruptible 120V-l A.C. bus, or - be in a L(hi POWER within 6 hours.
- 2) With one' of the non-interruptible_-120V A.C.
busses not energized :from .its;cfassociated
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- Fort St. Vrain #1 Technical Specifications . Amendment Page 4.6-13 l a) Re-energize the non-interruptible 120V l A.C. bus from its associated inverter l connected to its associated D.C. bus l within 24 hours or be in a LOW POWER l or SHUTDOWN condition within the l subsequent 24 hours.
l 3) With one of the alternate non-interruptible l 120V A.C. bus instrument power transformers l inoperable, l a) Restore the inoperable transformer-to l an OPERABLE status within 72 hours,' .or l be in a LOW. POWER or SHUTDOWN condition l within the subsequent 24 hours. I d) D.C. Power Supplies; l 1) With' one D.C. b'us not . energized 'from it's
- l- associated battery-- -(except for ' battery. ;
' ~
l overcharging), l' .a) Re-energize the ; D'.C'. bus from.its. l._ associated battery within 24 hours, or: l be in~a LOW POWER or' SHUTDOWN. condition; l- with'in the subsequent-24 hours. ' 4 L 4
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Fort St. Vrain #1 Technical Specifications
. Amendment Page 4.6-14 l 2) With one of the required batteries inoperable,
'l- a) Restore the inoperable battery to an l OPERABLE status within.24 hours, or - be l in a LOW POWER or SHUTDOWN condition l within the subsequent-24 hours.
l ' ASSOCIATED SURVEILLANCE REQUIREMENT (s): 5.6.1, 5.6.2 , V
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Fort St. Vrain #1 Technical Specifications
. Amendment Page 4.6-15 l Basis for Specification LCO 4.6.1.1 l The OPERABILITY of the A.C. and 0.C. power source's and l associated distribution systems during POWER OPERATION l ensures tnat sufficient power will be available, as.
-l required to perform the intended safety functions' under l postulated abnormal and accident conditions. The minimum
-l specified requirements for independent and redundant A.C.
I and D.C. power sources and distribution systems are Plant Design l . adequate to satisfy the basis of General
- l ,
Criterion No. 24 as stated in Appendix C of the FSAR. j< . l The normal A.C. power source to plant auxiliaries is l the Unit Auxiliary Transformer (UAT) energized by the main l- turbine generator. The VAT can also be energized ~by-the
.l off site transmission. network after the . generator links l 'have been: removed to isolate the turbine generator. .:Tha 4
l UAT is connected to the 4160V A.C. busses 1A and IC.' g
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.The alternate off ! site A.C. - po'wer :: source .is the' l ..
;]x dhk{,g l_, 1 Reserve Auxiliary Transformer (RAT),-normally energized by y7 .
l- .
- the off site transmission network. ~The RAT is connectedt
-l- to the 4160V.A'.C. Bus.1B. This bus' canL-: supply g 7or _be' ,
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s 1l_ l supplied 'from,- the -other 4160V A.C.-buss'es:through ti.e: 26 11- . breaker connections. 'Upon. loss of ?powerfLfrom Sthe'?UAT,. y; _p ower _ supply,Jto the plant auxiliarieslis! transferred toL ,
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Fort St. Vrain #1 Technical Specifications 4 '. Amendment Page 4.6-16 , l Each 4160V A.C. bus can supply an associated 480V A.C. l essential bus through a stepdown transformer. Two l alternate diesel generator sets (comprised of two engines l and one generator per set) each supply onsite 480V A.C. l power to one 480V A.C. essential bus (bus 1 and bus 3, l respectively). Either stepdown transformer or diesel l generator set is capable of supplying two of the 480V A.C. l essential ~ busses through tie breaker connections. First-l in-with-lockout features prevent different power sources [ from being automatically connected to one another. l Redundant ~ 2 out of 3 'undervoltage relays are provided on
.l each 480V A.C. essential bus. Undervoltage .in two of l these busses results- in. load shedding, startup of the l diesel generator sets, and loading by the sequencer.
l Operation of one diesel generator set provides for l SAFE SHUTDOWN COOLING, at'the required capacity for-~one-l week' assuming'approximately 16,000 gallons of fuel oil.is l .available. Such'a reserveLcapacity. provides ample time' l' for obtaining. additional. fuel from off site' sources for
.I continued-operation of 'the diesel generator-' set.' -
The l- available' s'f, age' is : distributed between -the'. diesel l- generator fuel-tank-and s two auxiliary boiler ! fuel:(o11 Fuel: oilt transfer cor ' auxiliary boiler: fuel oil-
-l= ' tanks.
'l- ' pumps;are provided .tol supply' the day . tanks from - the ~ fuel (l. : storage tanks, s
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Fort St. Vrain #1 Technical Specifications
. Amendment Page 4.6-17
.l There are three separate instruments A.C. and D.C.
l power sources and distribution systems. Each one includes l a battery and battery. charger, an inverter, and associated l distribution busses. A backup battery charger can be ! l connected to. any of the batteries. The normal operating
-l configuration is as specified above in LCO 4.6.1.1.
.5 l Section 8 of the FSAR includes a detailed descriptio'n ll' of the auxiliary electric power system. l .The action _ requirements for various allowable levels
' l. of degradation of'the p,ower sources.' provide . restrictions .
- l. - upon continue'd facility- operation comme'nsurate with the
-l. level of.. degradation.-
The.'0PERABILITY Lof' the power l- sources is consistent; wi th -. the - initial ~ l conditions / assumptions of the FSAR, andlare based upon, n
.l ~ maintaining ~ at least one 'of the : redundant = s'ets:of on site .
l :- ~A.C. and.D.C. power' sources and associated : distribution
.l- systems-' operable ~-
during accident conditionsT;which l- postulate the loss of all off site' power,{; compounded' by.1;a'-
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- single'failureLof the other: redundant onsite sources. s
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Fort St. Vrain #1 l Technical Specifications !
'. Amendment j Page 4.6-18 l Specification LCO 4.6.1.2 -
Auxiliary Electric Power l System - LOW POWER, SHUTDOWN, and REFUELING l Limiting Conditions for Operation l As a minimum, 'the following Aux 111ary Electric Power l System sources and busses shall be OPERABLE; l a) One A.C. circuit between the off site transmission l ' network and the 480V A.C. ~ essential distribution l system, l b) One 4160V A.C. bus and an-associated 480V A.C. I essential bus,. l c) One diesel generator set with: l- 1) 325' gallons Pf~ fuel ' contained :in- the.
-l- associated diesel fuel. oil. day. tank,
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- 2) As minimum; of 10,000 gallons of . fuel in~
l , l underground storage, } , l_ 3) ---One fuel ~o1.1 transfer: pump from the' diesel 1-
+4-fuel oil storage tank ~to the associated diesel:
.l ,
l- : fuel oil _'ay d tank,. 4
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' .4) L The associated starting air:compressorandj
- l. receiver, ,
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Fort St. Vrain #1 Technical Specifications
'. Amendment Dage 4.6-19 l 5) One Boiler Fuel Oil pump OPERABLE between the -
l auxiliary boiler fuel supply and the l associated diesel fuel oil day tank. l NOTE: Both diesel generator sets may be l inoperable for up to 7 days if two l independent A.C. circuits between the l off site transmission network to the l 480V A.C. essential distribution system l are OPERABLE. s l 6) Or.e water, jacket heater .0PERABLE for ea ch'- l diesel engine. . l NOTE: Tho water-jacket heaters may .be v t l inoperable for up to.72 hours without I l the ' associated diesel. engine being 3. j considered inoperable. c)' Two of the three '120VL'A.C. non-interruptible
~
l +: l busses.must be energized. , W:
.o l: d) Two' of the th'ree batteries, their associated D.C.
9i
' l' busses, and~~a'; battery charger. capable ~offsupplying
- l_ the' batteries must be OPERABLE. .
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i Fort St. Vrain #1 Technical Specifications j
', Amendment <
Page 4.6-20 l l APPLICABILITY: LOW POWER, SHUTDOWN and REFUELING l ACTION: l - 1) With any of the .above minimum required electrical l power sources and distribution systems inoperable, l a) Be in a SHUTDOWN condition within 24 hours, and l b) Suspend'all ope. rations involving core alterations, of
~
l positive reactivity changes,- or' movement L l irradiated fuel, and
-l 'c) Initiate corrective action to restore.the required ~
i !-- -l sources, busses, or distribution systems .to 'an
" l ' OPERABLE status as soon as possible. 1 y
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-5.6.1,75.6.2; l ASSOCIATED SURVEILLANCE REQUIREMENT (S):
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+ Fort St. Vrain #1 Technical Specifications .
'. Amendment Page 4.6-21 l Basis for Specification LCO 4.6.1.2 ; l N l The OPERABILITY of the minimum specified A.C. and D.C. l power sources and associated distribution systems, during _ l SHUTDOWN and REFUELING conditions ensures that: 1) the I l facility can be maintained in a SHUTDOWN or REFUELING l condition for extended time periods and 2) sufficient - l instrumentation and control capability is available for l monitoring and maintaining safe operation of the unit. J. E' 3 s i' j:. 1 y ^
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6 A - . . -- - N- - - e Fort St. Vrain #1 Technical Specifications
. Amendment Page 5.6-1 l 5.6 EMERGENCY POWER SYSTEMS - SURVEILLANCE REQUIREMENTS l These surveillance requirements apply to the surveillance j of the equipment supplying electrical power to the essential
- plant services.
l Objective l To establish the minimum freq'uency and type of l surveillance for equipment' supplying electric power to the plant l auxiliaries te ensure that the motive power sources required to
. safely shut down the plant are available.
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Fort St. Vrain #1 Technical Specifications
. .- Amendment Page 5.6-2 l Specification SR 5.6.1 - Emergency A.C. Power Sources l Surveillance l The surveillance of the emergency A.C. power sources shall l be as follows:
l 1. Each of the required independent A.C. circuits between the l offsite transmission network and the onsite 480V A.C. l essential distribution system shall be: l a) Determined OPERABLE at least once per week by l verifying correct ' breaker alignments and . indicated <- l power availability, l b) Demonstrated OPERABLE at -least- once per 18 months l during shutdown- by transferring ..(manually .and l automatically) house power -supply. from the Unit'
~
l- Auxiliary Transformer circuit to the-Reserve Auxiliary : l Transformer.
~l 2. Each diesel generator set'shall be demonstrated OPERABLE: ,
l a) In - accordance . ~ with - :the frequency- spectfled .in l- TABLE 5.6.1-1 on a STAGGERED TEST BASIS by:' , level. 'in_ the day tank is at: l 1)-Verifying-the fuel
-l !1 east 325 gallons,- '
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Fort St. Vrain #1 Technical Specifications '. Amendment Page 5.6-3 l 2) Verifying the fuel level in storage is at least l the minimum quantity as defined in LC0 4.6.1.1 or l LCO 4.6.1.2, l 3) Verifying the fuel transfer pump starts and l- transfers fuel from the storage system to the day l tank. l 4) Verifying the OPERABILITY of the auxiliary boiler l fuel oil pumps. l 5) Verifying the -diesel engines' start from a normal' l pre-heated condition and' accelerate to normal l operating speed. The generator voltage and-l frequency shall be 480 t 48 volts and 60 1 1.2 Hz. l -within 10 seconds after the start signal. l 6) . Verifying lthe OPERABILITY of -the diesel engine
.l " shutdown" and "declutch protective function.
l- 7) Verifying that after. the generator is . synchronized - l to the associated 480V A.C. Bus, it can be . loaded' l to greater than or equal; to 1200'kw with'two' l - diesels per generator' in- less' - than f or; _ equal 'to! l 90' seconds,- and operates with a load greaterEthan' l' or equal to 1200 kw for at least-2. hours.,
- 8) Verifying the' water-jacket heaters are OPERABLE,-
l l .and_the water temperature is at least 120*F.
)
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- Fort St. Vrain #1
' Technical Specifications
'. Amendment Page 5.6-4 l b) At least once per quarter by verifying that a sample l of fuel oil obtained in accordance with ASTM-D270-1975 l has a water and sediment content of less than or equal l to .05 volume percent and a kinematic viscosity 0 40 C l of greater than or equal to 1.9 but less than or equal l to 4.1 when tested in accordance with ASTM-D975-1977, l and an impurity level of less than 2 mg. of insolubles
'l per 100 ml. when tested in accordance with l ASTM-D2274-1970.
l c) At least once per 18 months, during REACTOR. SHUTDOWN, l by:
~
l 1) Subjecting the diesel; engines to'an inspection in l accordance 1with the( procedures prepared .in l _
' conjunction with .the manufacturer's-l- recommendations,.
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i Fort St. Vrain #1 Technical Specifications
'. Amendment Page 5.6-5 l 2) Calibrating the diesel engine water-jacket heater l temperature control functions; and the low exhaust l temperature, overspeed, high water temperature, l low oil pressure, and high oil temperature, l " shutdown" and "declutch" protective functions; i
l and the inlet manifold A P selective function, l 3) Verifying the generator capability to reject a l load of greater than, or equal to, -175 kw while l maintaining. voltage at 480 1 48 volts and l frequency at 60 1.2 Hz, l 4) Verifying, frem the parallel condition, the l- generator capability to reject a load of 1200 kw , [ .w ithout tripping. The generator voltage shall not l exceed 552 volts during . and following, the load. l rejection, l 5) Veri fying . that .with! san -undervoltage -relay l actuation signal, 1 l -a. De-energization of the .480V ,A.C. essential. l busses andLload shedding from fthe. 480V
~A.C.
-l. , essential busses oc:urs.-
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-- Fort St. Vrain #1
' Technical Specifications
. Amendment Page 5.6-6 l b. The diesel engines start on the auto-start l signal, energize the 480V A.C. essential l busses, energize the auto-sequenced loads, and l OPERATE for greater than or equal to 5 minutes l while their generator is loaded with the l programed loads. After energization, the l steady state voltage and frequency of the l 480V A.C. essential busses shall be maintained l at 480 t 48 volts and 60 1.2 Hz during this l test.
l 6) Verifying that the auto-se.quenced loads to each-l diesel generator set ~do not' exceed 1200. kw with l two diesel engines operating per generator. l 7) Veri fying the diesel generator's capability to be l synchronized with the offsite power source upon a ' l . simulated restoration of. offsite power while the l generator.is loaded with its emergency loads. l 8)~ Verifying the diesel generator sets OPERATE for at l 1 east 24 hours. -During this Jtest, -the idiesel~ l generator shall be loaded.to' greater than or equal' l 'to.1200 kw. a s .] # .
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- Fort St. Vrain #1
_ Technical Specifications
'. Amendment Page 5.6-7 l 9) Within 5 minutes after completing the 24 hour test l specified in SR 5.6.1.2.d)8), verify the diesel l- engines start and accelerate to normal operating l speed. The generator voltage and frequency shall l be 480 i 48 volts and 60 1 1.2Hz, within l seconds after the start signal.
l d) At least once'per 10 years,- or after any modifications l which are determined to affect diesel generator l interdependence, by:-~ starting .both diesel generators l simultaneously, during_ REACTOR SHUTDOWN, and verifying
~
l that both ' diesel-generator sets accelerate to normal + l operating speed. l e) At least once per.10 years by draining the1 fuel oil l- storage. tank,L removing'the accumulated!. sediment and-l cleaning the tank using.a sodium hypochlorite solution: l- or equivali.iit. ,
'l' 3. The' 120V A.C. ; Instrument" busses' shall 'be determinid1 l energized in the required manner:as stated in'LCO 4.6.1 at -
- l least Lonce per week by . verifying correct breaker alignment- _
~
.l .and indicated voltage on-the busses. _
.E-
.l- 4. The ~125V D.C. busses shall'be determined energized in the: ,
-l required. manner as stated 1n LCO.4.6.1Lat 1 east?;once iper ,
1 (ll week. by verifying correct' breaker alignment'and. indicated;
< ; [ -~ ; voltage on;the busses.
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+1 Fort St. Vrain #1 '
' Technical Specifications
'.. Amendment L Page 5.6-8 l TABLE 5.6.1-1 :
l DIESEL GENERATOR TEST SCHEDULE l_ Number of Failures in
-l Last 20 Valid Tests
- Test Frequency l s1 At least once per 31 days
- l. -22 At least once per 7 days ** q l l- .2 3 See TABLE 5.6.'l-2 1
L l:* . Criteria for determining number of failures.and number of. valid 7 l tests shall be in accordance with Regulatory Position: C.2.e 'of; l ~ Regulatory Guide 1.108,' Revision 1, August 1977,;wherelthe~1ast-L, 1l 20 tests are determined on a p'e r diesel generator basis. >Entryg L l ~.into this schedule shall be made at the monthly _ test frequency.., c
- i. .
'l ** This. test frequency shall'be maintained untiltseven consecutive- s-l .. failure free demands have 'been performed <and Ethe;-: number Sof; -
l~ -
-l ; failures in the last 20 demands has been reduced' to one or less.
.l, When the-test is done'on a once per-7Jdays11nterval,:it.willinot L
- l be done on a STAGGERED TEST-BASIS. .
llASTAGGEREDTESTJBASISshall,.conststiof: -
, 1 s . -
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- l: a. - A testi schedule Hforl!.n.' systems,' subsystems,:triins', Lor?
.other.~' designated components 1obtained;by; dividing 1. thel
, l- E -
. 'l; ; speci f f ed ' test finterval)into n equal t
; subinterval's~.7 i
'. l. Eb. ! The- testing 3:of one' ! system,. subsystem,' trail, orMothirj
'l i fdesigna.ted component?should "
occur!at>the:beginning of eachL - l~ '_- subi nterval' f . . I 1 0 % ~ d
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Fort St. Vrain #1
' Technical Specifications
'. Amendment Page 5.6-9 l TABLE 5.6.1-2 l ADDITIONAL RELIABILITY ACTIONS l No. of Failures No. of Failures l in Last 20 in Last 100 l Valid Tests Valid Tests Action l 3 -6 Within 30 days, prepara and l maintain a report for NRC l audit describing the diesel l engine reliability improve-- l , ment program implemented at. l the site. Minimum require-l ments for the report are l, indicated in Attachment 1:
. l to this table.
l 5- 11 If.the cause of the failure l :cannot be found and remedied,' , l declare.-the diesel ~ generator.- l -inoperable and perform'a l (requalification test program l for the affected' diesel l engine. ' Requ'ali fication - l test. program-requirements., l are indicated in' Attachment'-
.l- 2'to'this(table. .
l 'N/A ;N/A- -- Submit ~ a yearly ' data report - _l (onithe diesel _ generator.
'l> reliability.
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- Fort St. Vrain #1 l
' Technical Specifications . Amendment Page 5.6-10 l ATTACHMENT 1 TO TABLE 5.6.1-2 l REPORTING REQUIREMENT l As a minimum, the reliability improvement program report for NRC l audit shall include:
l a) a summary of all tests (valid and invalid) that occurred l within the time period over which the last 20/100 valid l tests were performed l b) analysis of failures and determination of root causes of l failures l c) evaluation of each of the recommendations of NUREG/CR-l 0660, " Enhancement of Onsite Emergency Diesel Generator l Reliability in Operating Reactors," with respect to their l application to the, Plant l d) identification of all actions taken, or to be taken, to 1) l correct the root causes of failures defined in b) above l and 2) achieve a general improvement of diesel generator l reliability l e) the schedule for implementation of each action from d) l above l f) an assessment of. the existing . reliability of. electric l power to engineered-safety-feature equipment-l Once a licensee has prepared and maintained an initial report 1 l detailing the diesel generator reliability improvement program at the. l site, as defined above, the licensee need: prepare only a supplemental-l report within 30 days after each failure during;a1 valid demand ~for so-l long as the affected diesel generator unit continues to violate-the l criteria (3/20 or 6/100) .for the reliability ' improvement program
- l. remedial- action. The supplemental. report need .only update the-l failure / demand history.for the-affected-diesel generator unit since-l the last report for that diesel generator. The supplemental report
. l shall also present an analysis of the1 failure (s) with a . root' cause l determination, if ~ possible, and shall 1 delineateany. further l procedural, hardware or^ operational. changes to be Lincorporated into-l'the site _ diesel generator improvement program and;the schedule for l implementation of those changes.
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<= Fort St. Vrain #1
' Technical Specifications
'. Amendment Page 5.6-11 l ATTACHMENT 2 TO TABLE 5.6.1-2 l DIESEL GENERATOR REQUALIFICATION PROGRAM l (1) Perform seven consecutive successful demands, as specified l- in SR 5.6.1.2.a, without a failure within 30 days of i diesel generator being restored to OPERABLE status, and
'l fourteen consecutive successful demands without a failure l within 75 days of_the diesel generator being restored to l OPERABLE status.
l (2) If a failure- occurs during the first seven tests in the l requalification test program,- perform seven successful l demands without an additional failure within 30 days of l diesel generator being restored to operable status and l fourteen consecutive successful demands without a failure l within 75 days of the diesel generator being restored ~ to ' l OPERABLE status. l (3)- If a failure occurs during the second seven tests (tests 8 l through 14) of (1), above, perform . fourteen consecutive l demands without an additional fail,ure within 75 days of l the failure which occurred during tne requalification l t esting. 1 (4) Following the -second failure during the requalification '
.l test program, be in REACTOR SHUTDOWN within 36 hours.
l- (5). During requalificktion testing the diesel generator should l' 'not be tested more frequently than;at 24-hour intervals. l After a- diesel . generator 1 has been.'successfully1 requalified,
-l subsequent repeated requalification tests will'not;be required for l'that diesel generator under the following condttions:
1 (a) The number._ of fi ailures' in'the last 20 valid. demands'is
- 1. -less than 5.
.l '(b) .The.. number of failures in the last'100. valid demands 11s
-l less than 11.,
1" -(c), In th'e event'that following-_ successful requalificat' ion ofi l .a(diesel generator, the number of... failures':1s still, in f,
+
l : excess of.the remedial action criteria (a and/or b above) the following exception will be: allowed u_ntils-the idiesel
~
._l.
~l. generator is no' longer lin violationfof the Lremediallactiori-
.l. criteria:(a_and/or-b.above)..
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- l- LRequalification)testingwill'not'be' required!rovidedEthat P
.l ~ after each. valid demand the number.~of' failures'in the last 1 20~ and/or- 100 valid' demands has'not' increased.a Once the l . diesel generatorx is no longer.In. violation of:the remedial >
- l action criteria above,-_ Lthe provisions of:those _ criteria s
alone will prevail. x l s
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e Fort St. Vrain #1 Technical Specifications
.- Amendment Page 5.6-12
.i l Basis for Specification SR 5.6.1 l The above surveillance requirements are adequate to l demonstrate the OPERABILITY of the offsite and onsite A.C. power l sources, and of the A.C. power distribution system to perform l their intended safety functions under postulated abnormal and j l accident conditions. l In particular, the surveillance requirements for the l- standby diesel generator sets are consistent with the intent of l Regulatory Guide 1.108 " Periodic Testing of Diesel Generator. , l Units Used as Onsite Electric Power Systems at. Nuclear Power.
.t l Plants", Revision 1, August 1977.
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'< Fort St. Vrain #1 Technical Specifications '. Amendment
, Page 5.6-13 l Specification SR 5.6.2 - D.C. Power Sources Surveillance i l Each 125-volt battery and charger shall be demonstrated l OPERABLE: l a) At least once per week by verifying that: l 1) The parameters in Table 5.6.2-1 meet the Category A l limits, and l 2) The total battery terminal voltage is greater than or l equal to 129 volts on float charge.
-l b) At least once per quarter, and within one week after a l- . battery discharge with battery terminal voltage :below l 110 volts, or battery overcharge with battery terminal l voltage above 150 volts, by verifying that:
l 1)- The : parameters 'in Table 5.6.2-1 meet the. Category'B . l ' limits,
- l. 2) There is- no visible corrosion at either terminals or
-l connectors, and-l -3) The average- electrolyte - temperature of a :,
l representative-sample of f at least 20% of the cells are l 'above 60'F. , L%"
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< Fort St. Vrain #1
' Technical Specifications
. Amendment Page 5.6-14 l c) At least once per 18 months by verifying that:
l 1) The cells, cell plates, battery racks, and cell-to-l cell and terminal connections show no visual l indication of physical damage or abnormal l deterioration, and l 2) The cell-to-cell and terminal connections are l adequately tight, and'sufficiently coated with anti-l corrosion material, and
-l 3) The temperature difference;-of each cell-to-cell and
~
- l. terminal connection is less than 10'F.
l d) At least once per 18 months, during. shutdown, by verifying l~ that the battery capacity is ~ adequate - to . supply .and-I maintain. in an OPERABLE status all of.the emergency loads-
.for the design: duty cycle when the ba.ttery.is load-tested
- to service discharge.
l e) At least onc'e per 60 months, during REACTOR SHUTDOWN,
-l 1) A performance discharge : test: shall.;be -done ~on.
l .. batteries 1A and IB.(at an average discharge 1. rate of
-l- 85 amps) over_ a .l period of~.24 hours, or.untilLthe:
I battery.terminaltvoltage reaches'c101.5.; volts. The: 11 test ~ shall'~bel acceptable fif, after 19.2 hours the l battery is . capable of producing:at least- 85 amps,.' Land l> theo battery terminal; voltage- is' greater than 10115 l' volts'. t 'k'_
- Fort St. Vrain #1 Technical Specifications
-* Amendment Page 5.6-15 1
l 2) A performance discharge test shall be done on battery
, l IC (at an average discharge rate of 79 amps) over a
-i l period of 12 hours, or until the battery terminal l voltage reaches 101.5 volts. The test shall be l' acceptable if, after 9.6 hours the battery is capable l l of producing at least 79 amps and the battery terminal l voltage is greater than 101.5 volts. l NOTE: Once per 60 month interval, the performance l l discharge test may be done in lieu of the battery l service test in SR 5.6.2.d). l f) Annual performance discharge tests of battery capacity s l shall be performed on any battery that' shows ' signs of l abnormal degradation aor has reached 85% of the service
.l life expected for the application. Abnormal.-degradation l is indicated when the battery capacity drops.more than 10%
l of rated capacity. from its average cni previous; performance-
.l tests,-or is below 90% of the manufacturer's rating.
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< Fort St. Vrain #1
. ' Technical Specifications
*. Amendment Page 5.6-16 l TABLE 5.6.2-1 l c 7Y SURVEILLANCE REQUIREMENTS l
ll 'l l l ll l (1)l (2) l ll l CATEGORY A l CATEGORY B l ll l l l ll l l l (3) l. l l Parameter l Limits for each l Limits for each l Allowable l ll l designated pilot l connected cell. l value for each l.
, l -l l cell. l l connected cell. l ll l l l l l l Electrolyte l > Minimum level l > Minimum level l Above top of l l'l Level l indication mark, l indication mark, l plates, and not l ll l and s " above I a_nd s " above l overflowing. l ll l maximum level I maximum level l l ll l indication mark. l-indication mark. l l ll l l l l I l- l l - (c) l l-
'l l Float Voltage l 2 2.13 volts. l 2 2.13 volts. l > 2.07 volts ll l. (b) l l _
l l l Specific l.2 1.200. l 2 1.195 l Not more than l l l Gravity (a)(4) l l l .020 below~the__ l~ ll l l -l average of all - l ll l l- :ll connected cells. l l-l l- li l- l ll l .l .
-l .
=l-l_l. l l Average of all. .l Average of'all ,l l- l l- l-connected cells: l.. connected cells l-ll *l
.'l > 1.200- l 2 1.195f(b)'- '
; l; ll l l l l
-]-(a) Corrected for electrolyte temperature and level.
l (b) Or, battery charging current 1 is less-;than (2) amps when.on l~ charge. l-(c) Corrected for, average electrolyte temperature.
~ '
- l-(1) For ': any Category l A parameter (s)' outside the limit (s) shown',z the
_l battery may be considered OPERABLE'provfded that within 24 hours l- all; the. Category. B measurements are taken 'an'd found to be within : , (l their allowable: values, :and= provided all -Category :A Land._B-l parameter (s)' arei restored ;to~L.within-l11mits within"the.next; l . 6 days. l (2)L ' Fors.any Category B-parameter (s)Toutsidethe. limit'(dTshown,1the l' battery may be considered 0PERABLE.provided that. the _ Category B:
.l parameters 1are .within their allowable _ values;and provided.the.
, l Category 8 parameter (s) are- resto_ red to within limits 'within' the
..l -
=next-7 days.: '
l,(3); Any' Category B parameter not-' within its allowable ivaluel . 1l . indicates anl INOPERABLE battery. il (4) Numbers assume a-manufacturer's recommended full, charge.: specific-l gravity'of 1.205 to'1 220= d i{ L. . __ __._._ _ _ u_. _ _. _
< Fort St. Vrain #1 Technical Specifications o Amendment Page 5.6-17 l Basis for Specification SR 5.6.2 l The type of battery surveillance called for in this l specification has been demonstrated through experience to I provide a reliable indication of a battery cell initial l breakdown well before it becomes unserviceable. Since batteries l will deteriorate with time, these periodic tests will avoid
[ precipitous failure. l The manufacturer's recommendation to equalize'chargeLis 1
~
-l vital to maintenance of the ampere-hour capacity of' the battery. '-
As a check upon the effectiveness of this charge, each battery- -' l
~
l is tested.to verify . that it meets its service ampere-hour l . capacity. In addition, its voltage is monitored as a function l of time. If a cell has deteriorated, or if a connection..is l loose, the voltage under load will drop excessively,!1ndicating-
-l need for replacement or maintenance.
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I h 4 i 1 4 i i I a ATTACHMENT 3 { SIGNIFICANT HAZARDS ANALYSIS e 9 h n w k h [u w , h g s 5 l
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Attachment 3 e to P-85041 SIGNIFICANT HAZARDS ANALYSIS INTRODUCTION A safety analysis was included as Attachment 2 to the submittal of these Specifications on December 30, 1983 (P-83415). This safety analysis will cover those changes made since the above submittal. All these proposed changes to LCO's have the new format' incorporated, and changes of this type have no impact on safety. LC0 4.6.1 This Specification has been divided into two new Specifications, LCO 4.6.1.1 and LC0 4.6.1.2. LC0 4.6.1.1 describes auxiliary electrical equipment required for operation above 2% power. Requirement for operation below 2% power is described in LC0 4.6.1.2. In addition to -the changes required by the format changes, LC0
'4.6.1.1 has had existing sections reorganized into a more logical sequence. Specific changes include: the expansion of the 120V A.C.
bus requirements to describe bus pairs , and the battery requirements-have been altered to more accurately reflect the existing system. None of these changes alter the safety-functions of this system. SR 5.6.1 , - s This surveillance' was altered to be compatible with LC0 4.6.1.1 and LCO 4.6.1.2. The generic _ letter 84-15 . requirements on . Diesel Generator Reliability have also been incorporated. The reference to
" partial discharge" has been changed to " service discharge". This service discharge is the full capacity of the batteries required by the~FSAR, not_the full capacity of the . batteries. The performance discharge TESTS have also been added, and TABLE 5.6.2-1 was altered to be more easily read. These are not safety significant changes.
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n-CONCLUSION
.o These changes have been made to accurately and concisely indicate the *o manner in which the plant may be safely operated. These changes, for the most part, have been made to correct errors and make the Specifications more clear. .
Based on the above evaluation, it is concluded that operation of Fort St. Vrain in accordance with the proposed changes will not: (1) 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 accident previously evaluated, or (3) involve a sighificant reduction in any margin of safety, f' 'Therefore, these changes will not increase the risk to the health and safety of the public nor do they involve any significant hazards considerations. 9
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