ML20149K055
| ML20149K055 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 07/21/1997 |
| From: | ENTERGY OPERATIONS, INC. |
| To: | |
| Shared Package | |
| ML20149K053 | List: |
| References | |
| NUDOCS 9707290223 | |
| Download: ML20149K055 (9) | |
Text
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PROPOSED TECHNICAL SPECIFICATION CHANGES i
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PLANT SYSTEMS EMERGENCY FEEDWATER SYSTEM
. LIMITING CONDITION FOR OPERATION 3.7.1.2 Two emergency'feedwater pumps and associated flow paths shall be j
OPERABLE with:
I j
a.
One motor driven pump capable of being powered from an OPERABLE emergency bus, and i
l b.
One turbine driven pump capable of being powered from an OPERABLE j.
steam supply system.
j APPLICABILITY:
MODES 1, 2, and 3 ACTION:
With one emergency feedwater pump inoperable, restore the inoperable pump
.f to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in HOT SHUTDOWN within the next 12 j
hours.
i SURVEILLANCE REQUIREMENTS l
4.7.1.2 Each emergency feedwater pump shall be demonstrated OPERABLE:
I l
a.
At least once per 31 days by:
l 1.
Verifying that each valve (manual, power operated or l
j automatic) in the flow path that is not locked, sealed, or otherwise secured in position, is in its correct position.
1 i
b.
In accordance with Specification 4.0.5 by:
i
}
1.
Verifying the developed head of each EFW pump at the flow test point is greater than or equal to the required developed head.
]
This surveillance requirement is not required to be performed for the turbine driven EFW pump until 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> after exceeding i
700 psia in the steam generators.
1-1 i
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i ARKANSAS - UNIT 2 3/4 7-5 Amendment No, M,H 6,
=
PLANT SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) c.
At least once per 18 months by:
l 1.
Verifying that each automatic valve in the flow path actuates to its correct position on MSIS or EEAS test signals.
2.
Verifying that the motor driven pump starts automatically upon receipt of an EEAS test signal.
3.
Verifying that the turbine driven pump steam supply MOV opens automatically upon receipt of an EEAS test signal.
d.
By verifying proper alignment of the required EFW flow paths by verifying flow from the condensate storage tank to each steam generator. This SR is required to be verified prior to entering MODE 2 whenever plant has been in MODES 4, 5,
6, or defueled for
> 30 days.
a i
l ARKANSAS - UNIT 2 3/4 7-6 Amendment No. M,
. PLANT SYSTEMS
~
BASES 114.32% =
Total maximum safety valve relieving capacity of 102% power steam flow Total relieving capacity of all safety valves per steam X
=
line in lbs/ hour Total Maximum relieving capacity of the inoperable safety Y
=
valve (s ) in lbs/ hour.
In each case, the valves with the greatest relieving capacity were assumed inoperable.
3/4.7.1.2 EMERGENCY FEEDWATER SYSTEM The OPERABILITY of the emergency feedwater (EFW) system ensures that the Reactor Coolant System can be cooled down to Shutdown Cooling (SDC) entry conditions from normal operating conditions in the event of a total loss of offsite power.
The EFW system is designed to supply sufficient water to the steam generator (s) to remove decay heat with steam generator pressure at the setpoint of the MSSVs.
Subsequently, the EFW system supplies sufficient water to cool the unit to SDC entry conditions, and steam is released through the ADVs.
SR 4.7.1.2.b.1 verifies that each EFW pump's developed head at the flow test point is greater than or equal to this required developed head.
This test ensures that EFW pump performance has not degraded during the cycle.
Flow and differential head are normal tests of pump performance required by Section XI of the ASME Code.
Because it is undesirable to introduce cold EFW into the steam generators while they are operating, this testing is performed on recirculation flow.
This test confirms one point that is indicative of pump overall performance.
Such inservice tests confirm component OPERABILITY, trend performance, and detect incipient failures by indicating abnormal performance.
Performar.ce of inservice testing, discussed in the ASME Code,Section XI, satisfies this requirement. This SR is modified by indicating that the SR should be deferred until suitable test conditions are established. This deferral is required because there is an insufficient steam pressure to perform the test.
SR 4.7.1.2.d ensures that the EFW System is properly aligned by verifying the flow path from the condensate storage tank (CST) to each steam generator prior to entering MODE 2 operation, after more than 30 days below MODE 3.
OPERABILITY of the EFW flow paths must be verified before sufficient core heat is generated that would require the operation of the EFW System during a subsequent shutdown. The Frequency is reasonable, based on engineering judgment, and other administrative controls to ensure that flow paths remain OPERABLE. To further ensure EFW System alignment, the OPERABILITY of the flow paths is verified following extended outages to determine that no misalignment of valves has occurred.
This SR ensures that the flow path from the CST to the steam generators is properly aligned.
3/4.7.1.3 CONDENSATE STORAGE TANK The OPERAEILITY of the condensate storage tank with the minimum water volume ensures that sufficient water is available to maintain the RCS at HOT STANDBY conditions for one hour with steam discharge to atmosphere with concurrent with total loss of off-site power. The contained water volume limit includes an allowance for water not usable because of tank discharge line location or other physical characteristics.
ARKANSAS - UNIT 2 B 3/4 7-2 Amendment No. 4 %,
A a
A 8
e e
b MARKUP OF CURRENT ANO-2 TECHNICAL SPECIFICATIONS (FOR INFO ONLY) l
PLANT SYSTEMS EMERGENCY FEEDWATER SYSTEM LIMITING CONDITION FOR OPERATION 3.7.1.2 Two emergenc-j feedwater pumps and associated flow paths shall be OPERABLE with a.
One motor driven pump capable of being powered from an OPERABLE emergency bus, and b.
One turbine driven pump capable of being powered from an OPERABLE steam supply system.
APPLICABILITY:
MODES 1, 2, and 3 ACTION:
With one emergency feedwater pump inoperable, restore the inoperable pump i
to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in HOT SHUTDOWN within the next 12 l
hours.
SURVEILLANCE REQUIREMENTS j
4.7.1.2 Each emergency feedwater pump shall be demonstrated OPERABLE:
a.
At least once per 31 days by:
1.
V :ifying that the turbin; d;iven pump delivc::
flou cf C '95 gpr -hich is capab1: cf being cupplied to th; stear genc :ber at di:charg; pressere of _1200 psig when stear gent: tcr--peeeemt 1: g : ster than 800 psic.
The previcione cf Specif+ecti n
'.0.'
- not applicable.
2.
V::Ffying that the electric dc4ven pump delivers f1cu of 2'85 gpr which-1; ::p ble of being supplied tc th steem gent sters at : discharge pre::ur cf 21200 p:1, 9
14.
Verifying that each valve (manual, power operated or automatic) in the flow path that is not locked, sealed, or otherwise secured in position, is in its correct position, b.
In a.ccordance with Specification 4.0.5 byl 1.
Verifyinc_t_he developed head of each EFW pump at t.be flow test point is_ greater than or equal to the required developed head.
This surveillance re_quirement is not reguired to bL oerformed fo_r the turbine driven EFW pump until 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> after exceeding 700 psia in the steam ceperators.
ARKANSAS - UNIT 2 3/4 7-5 Amendment No. 61,444,
m 4
e l
PLANT SYSTEMS
)
i SURVEILLANCE REQUIREMENTS (Continued) 4 t
I j
gh.
At least once per 18 months during :h td:r-by:
l 1
l 1.
Verifying that each automatic valve in the flow path actuates to its correct position on MSIS or EEAS test i
signals.
I 4
2.
_ Verifying that the motor driven pump starts automatically upon receipt of an EEAS test signal.
i 3.
Verifying that the turbine driven pump steam supply MOV j
opens automatically upon receipt of an EEAS test signal.
i i
'/;:ifying the n;; 1 fl:x p;th ;f the turbin; driven EFW-4::in f::= the prim::y EP'd :y:t;: wete ::::::
a t.
to th: :t;;; ;;;;;;t:::.
Th: p::vi:i::: cf Sp;;ific ti:n t.0.0 ::: n:t :pplic:ble.
d.
Bv verifyina proper alianmer t of the reauired EFW flow oaths by i
verifv(na flow from the conc.ensate storace tank to each steam ggngrator. This SR is recuired to be verified prior to enterina MORE 2 whenever plant has been in MODES 4, 5,
6, or defueled for
> 30 days.
4 i
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ARKANSAS - UNIT 2 3/4 7-6 Amendment No. 69,
1 1
PLANT SYSTEMS BASES 114.32% =
Total maximum safety valve relieving capacity of 102% power
)
steam flow X
Total relieving capacity of all safety valves per steam
=
line in lbs/ hour Total Maximum relieving capacity of the inoperable safety Y
=
valve (s) in lbs/ hour.
In each case, the valves with the greatest relieving capacity were assumed inoperable.
3/4.7.1.2 EMERGENCY FEEDWATER SYSTEM The OPERABILITY of the emergency feedwater (EFW) system ensures that the l
Reactor Coolant System can be cooled down to Shut _down Cooli_pa (SDC) entry conditions 1 :: than 250*F from normal operating conditions in the event of a total loss of off-site power.
Each :=crgency feeducter pump i: :pablu u f delidmf--a-tetel 1
ft duct r fieu f 485 gpr at : prc::ur: cf 1100 peig tc th: entran : cf th: steam gencreters.
Thie-eapacity 10 cufficient tc neur that adequat:
feeductc: flen 1: available t rcm ve decay heat and : due the ne::ter Ge:1:nt Syst = tempeeeture to les: than 250*F uhen th: chutdeu- :: cling systc= may bc picecd int; cperatienr The EFW system is designed to_supolv sufficient water to the steam generator (s) to remove decav heat with steam cenerator qressure at the setpoint of the MSSVs.
Subsecuentiv, the EFW system sypolies sufficient water to cool
)
the unit to SDC entry conditions,_and steam _i_s released throuch the ADVs.
SR 4.7.1.2.,b.1 verifies that each EFW oump's developed head at the flow test point is_ greater than or_eaual to this reauired developed head.
This test ensures that EFW pump _ performance has not dearaded durina the cycle.
Flow and differential head are normal tests of oump performance recuired by Section XI of the_ASME Code.
Because it is undesirable to introduce cold EFW into the steam generators while they are operatino, this testina is performed on recirculation flow.
This test confirms one point that is indicative of pump overall performance.
Such inservice tests confirm component OPERABILITY, trend performance, and detect incipient failures by indicatina abnormal performance.
PerformaDee of i_Dservice testing, disgussed_in_the ASME Code,Section XI, satisfies this reaufrement.
This SR is modified by indicatina that the SR should be deferred until suitable test conditions are established. This deferral is renuired because there is an insufficient steam pressure to perform the test.
SR 4.7.1.2.d ensures that the EFW System is properly alianed by_vsrifying the flow path from the condensate storage tank (CST) to,g,ach steam _cenerator ggior to enterina MODE 2 opetation, after more th.an 30 days below SQDE_22 OPERABILITY of the EFW flow paths must be verified befg e_suff4 lent cor.,e heat is_geperated that would require the op_eration of the EFW eystem durino_a subseauent shutdown.
The_Erecuency ip__ tea s on able, based en enaineering iudgment,and other administrative controls to ensure that flow paths remain t
OPERABLE. To further ensure EFW System alionment, the OPERABILITY of the flow paths is verified _followipo extended outaaes to determine that no misalignment of valves has occurred, ju3is SR ensures that the flow path from the CST to the steam _ generators is_p_r_operly alianecl1 3/4.7.1.3 CONDENSATE STORAGE TANK The OPERABILITY of the condensate storage tank with the minimum water volume ensures that sufficient water is available to nmintain the RCS at ARKANSAS - UNIT 2 B 3/4 7-2 Amendment No. 460,
m.-.
. HOT STANDBY conditions for ona' hour with steam discharga to atmosphere with concurrent with total loss of off-sito power. The contained water volume limit includes an allowance for water not usable because of tank discharge line location or other physical characteristics.
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ARKANSAS - UNIT 2 B 3/4 7-2 Amendment No, MO,