ML20237C350

From kanterella
Jump to navigation Jump to search
Proposed Tech Specs Partially Reducing Load at Which DGs Are Required to Be Tested Per Affected SRs in Order to Reduce Stress & Wear on Machines While Still Sufficiently Challenging Machines to Confirm Operability
ML20237C350
Person / Time
Site: Clinton Constellation icon.png
Issue date: 08/17/1998
From:
ILLINOIS POWER CO.
To:
Shared Package
ML20237C349 List:
References
NUDOCS 9808210106
Download: ML20237C350 (12)
v • d • e


Text

- - _ - - . _. . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ - _ _ - - _ _ _ -

Attachment 3 to U-603030 LS-98 003 Page 1 of 4 Marked-Up Pages from the Technical Specifications 9808210106 990817 l PDR ADOCK 05000441 '

1 P PDR ,

i 1

i.  :

I AC Sources-Operating 3.8.)

l SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE

- FREQUENCY j

{

SR 3.8.1.3 -------------------NOTES-------------------

1. DG loadings may include gradual loading as recommended by the manufacturer. .
2. Momentary transients outside the load range do not invalidate this test.
3. This Surveillance shall be conducted on only one DG at a time.
4. This SR shall be preceded by, and immediately follow, without shutdown, a successful performance of SR 3.8.1.2 or SR 3.8.1.7.

Verify _ qach DG perates for 2 60 minutes at As specified in a load 2 86 k for DG 1A, a 87 kW for Table 3.8.1-1 DG 18, and 2 200 kW for DG 1C.

(I960 w s 3488 SR 3.8.1.4 Verify each day tank contains a 385 gal of 31 days fuel oil for DG 1A and DG 18 and a 240 gal for DG IC.

SR 3.8.1.5 Check for and remove accumulated water from 31 days each day tank.

SR 3.8.1.6 Verify the fuel oil transfer system 31 days operates to automatically transfer fuel oil from the storage tank to the day tank.

(continued) l CLINTON 3.8-5 Amendment No. 95 L _ _ _ _ _ _ _ _ _ _ _ _ _ . . _. -

4 AC Sources-0perating I 3.8.1 1

1

( SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY SR 3.8.1.10 -------------------NOTE--------------------

i This Surveillance shall not be performed in ~

MODE 1 or 2. However, credit may be taken for unplanned events that satisfy this SR.

1 Verify each DG operating at a power factor 18 months s 0.9 does not trip and voltage is maintained s 5000 V for DG 1A and DG 18 and l s 5824 V for DG IC duringund followina a '

load re- tion of a load 208697knLfor DG (3482).

A 1A, 2 ;75 kW for DG 18, and 2 200 kW for DG 1C.

88 /960 (continued)

(

1 CLINTON 3.8-7 Amendment No. 95

3.8.1 SURVEILLANCE' REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY

. . 1 SR 3.8.1.14 -------------------NOTES-------------------

1. Momentary transients outside the load l .

and power factor range: do not i invalidate this test. ~

2. This Surveillance shall not be performed in MODE 1 or 2. However, credit may be taken for unplanned events that satisfy this SR.

Verify each DG operating at a 18 months s 0.9 operates for a 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />s: power factor - ,

(4(O(o2) '

m a. hottrs loaded a kW o G l (4/%cyj Fora IA, mAZ 2_CykW-forDG18,andm 2 kW

[3 f o) for DG IC; and _

b. For the rem ing hours of the t

/ loaded kW f r DG 1A, W l (3'1'8 ~

for DG IB a 20 kW for D (3488)

(/980) .

SR 3.8.1.15 ------------------NOTES---------------- --

1. This Surveillance shall be performed l within 5 minutes of shutting do (n thes- d2 hours) i 3 DG aftet DG has operate m j ho r (3482) loaded 2EQ for DG IBr_a_nd a kW fo DG 1A,.m H kW for DG IC.

l gj9g Momentary transients outside of the d3488)

. load range do not invalidate this test.

l

! 2. All DG starts may be preceded by an engine prelube period. '

i ...........................................

Verify each DG starts and achieves, in 18 months s 12 seconds, voltage te 3870 V a;.d s 4580 V a'nd frequency a 58.8 Hz and s 61.2 Hz.

(continued)

CLINTON 3.8-10 Amendment No.110 (

Attachment 4 to U-603030 LS-98@3 Page 1 of 8 l

l Attached Marked-Up Pages of the Technical Specification Bases l

l l

f

l AC Sources-Operating B 3.8.1 BASES (continued) i S RVEILLANCE The AC sources are designed to permit inspection and REQUIREMENTS testing of all important areas and features, especially those that have a standby function, in accordance with 10 CFR 50, GDC 18 (Ref. 8). Periodic component. tests are i

l supplemented.by extensive functional tests during refueling outages under simulated accident conditions. The SRs for i

demonstrating the OPERABILITY of the DGs are in accordancep with the recommendations of Regulatory Guide 1.9 (Ref. 3))ie--$

Regulatory Guide 1.108 (Ref. 9), and Regul_atory Gutae 1.:.37 (Ref. 10).

! ]R efs. 3 a.nd i T)

Where the SRs discussed herein specify voltage and frequency tolerances, the minimum.and maximum steady state output voltages of 3870 V and 4580 V respectively, are equal to

- 7% and + 10% of the nominal 4160 V output voltage. The

' specified minimum and maximum frequencies of the DG is 58.8 Hz and 61.2 Hz, res 60 Hz nominal frequency.pectively, are equal The specified steadytostate i 2%voltage of the and frequency ranges are derived from the recommend &tions given in Regulatory Guide 1.9 (Ref. 3). However, the l minimum voltage was increased to ensure adequate voltage to operate all safety-related loads during a DBA (Ref.14).

l 1

(

SR 3.8.1.1

' This SR ensures proper circuit continuity for the offsite AC l

electrical power supply to the onsite distribution network and availability of offsite AC electrical power. The breaker alignment verifies that each breaker is in its correct

. position to ensure that distribution buses and loads are

! connected to their preferred power source and that l

appropriate independence of offsite circuits is maintained.

The 7 day Frequency;is adequate since breaker position is not likely to change without the operator being aware of it j and because its states is displayed in the control room.

l SR 3.8.1.2 and SR 3.8.1.7

, These SRs help to ensure the availability of the standby electrical power supply to mitigate DBAs and transients and maintain the unit in a safe shutdown condition.

(continued)

E CLINTON B 3.8-13 Revision No. 2-11

AC Sources-Operating B 3.8.1 BASES +- l I

SURVEILLANCE SR 3.8.1.2 and SR 3.8.1.7 (continued)

REQUIREMENTS The normal 31 day Frequency for SR 3.8.1.2 (see  !

Table 3.8.1-1, " Diesel Generator Test Schedule") is consistent with the industry guidelines for assessment of diesel generator performance (Ref.12). The 184 day ,

Frequency for SR 3.8.1.7 is a reduction in cold testing l M cVEG consistent with Generic Letter 84-15 (Ref. 7). These consis%en+ wA Ae. i Frequencies provide adequate assurance of DG OPERABILITY, g l while minimizing degradation resulting from testing.

of RegJa4or$ SR 3.8.1.3 I ble 1% Reas% This Surveillance demonstrates that the DGs are capable of synchronizing and accepting greater than or equal to the 3 g g; g equivalent of the maximum expected accident loads.PA --

SuNeillance is minimum run time of 60 minutes is required to stabilize engine temperatures, while minimizing the time that the DG P*rf* * *d w A & is connected to the offsite source.

I'"

"Y" Although no power factor requirements are established by se rester 46 this SR, the DG is normally operated at a power factor between 0.8 lagging and 1.0. The 0.8 value is the design 90 perced of rating of the machine, while 1.0 is an operational k

p3 %4;ms limitation to ensure circulating currents are minimized.

r&fing. The normal 31 day Frequency for this Surveillance (see Table 3.8.1-1) is consistent with the industry guidelines for assessment of diesel generator performance (Ref.12).

Note 1 modifies this Surveillance to indicate that diesel engine runs for this Surveillance may include gradual loading, as recommended by the manufacturer, so that mechanical stress and wear on the diesel engine are minimized.

Note 2 modifies this Surveillance by stating that momentary transients because of changing bus loads do not invalidate this test.

Note 3 indicates that this Surveillance shall be conducted on only one DG at a time in order to avoid common cause failures that might result from offsite circuit or grid perturbations. -

Note 4 stipulates a prerequisite requirement for performance of this SR. A successful DG start must precede this test to credit satisfactory performance.

CLiMTON B 3.8-15 Revision No. 1-1 l

. . I

  • AC Sources-Operating B 3.8.1 f- BASES .

SURVEILLANCE SR 3.8.1.9 (continued)

REQUIREMENTS electriW distribution systems that could challenge Mosoever, continued steady state operation and, as a result, plant safety systems. Credit may be taken for unplanned events gn3;g.44Q that satisfy this SR. Examples of unplanned events may include:

ree.ommandaflons e9 RY,jafor3 1) Unexpected operational events which cause the equipment to perform the function specified by this Guide. L.8), Re.viuon Surveillance, for which adequate documentation of the 3 g, g required performance is available; and

"' g W 'S 2) Post maintenance testing that requires performance of this Surveillance in order to restore the component to  !

perbmed is.4h OPERABLE, provided the maintenance was required, or performed in conjunction with maintenance required to A M load equ maintain OPERABILITY or reliability.

b # @** In order to ensure that the DG is tested under load han C) O p ni- conditions that are as close to design basis conditions as possible, Note 2 requires that, if synchronized to offsite

(

E Ik5 CMI"N power, testing be performed using a power factor :s; 0.9.

y.34;ng

  • This power factor is chosen to be representative of the c actual design basis inductive loading that the DG could experience.

SR 3.8.1.10 This Surveilla e demonstrates the DG capability to reject a full load, i. , maximum expected accident load, without overspeed tr ping or exceeding the predetermined voltage limits. The 5G. full load rejection may occur because of a system au t or inadvertent breaker tripping. This Surveillance ensures proper engine generator load response under the simulated test conditions. This test simulates the loss of the total connected load that the DG experiences following a full load rcjection and verifies that the DG does not trip upon loss of the load. These acceptance criteria provide DG damage protg tion. While the DG is not expected to experience this transient during an event and continue to be available, this response ensures that the OG is not degraded for future application, including reconnection to the bus if the trip initiator can be corrected or isolated.

(continued)

CLINTON 8 3.8-19 j Revision No. 0 l

~ '

AC Sources-Operating B 3.8.1 .

BASES

(.

SURVEILLANCE SR 3.8.1.13 (continued)

REQUIREMENTS The SR is modified by a Note. The reason for the. Note is that performing the Surveillance removes a required DG from #

service. Credit may be taken for unplanned events that satisfy this SR. Examples of unplanned events may include:

1

1) Unexpected operational events which cause the equipment to perform the function specified by this Surveillance, for which adequate documentation of the required performance is available; and
  • C S ^
2) Post maintenance testing that requires performance of to be. Ioaded this Surveillance in order to restore the component to OPERABLE, provided the maintenance was required, or e c{,v 2d +o or k performed in conjunction with maintenance required to grea.fer Am 105 oc , yjf PERABILITY or reliability.

percent of 4e fSR 3.8.1.T4 4-

% Reddon 3 M- f n_

conhuoos rafing l f,pg [ egg g demonstrationonc(eiper18montisthattheDGscanstartandl run continuously art 6il loadJcapability for an interval of ( (

hours and egual not less than 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> _sf-22 hours of which is at a load t j fequivalent to the continuous rating of the DG, and 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> j

+C' or f8NF of which is at a load equivalent to 110% of the continuous duty rating of the DG.f The.DG starts for this Surveillance 4S^ % P*r g can de performeo either from standby or hot conditions. The c8 4he conhoov3 provisions for prelube and wannup, discussed in SR 3.8.1.2, and for gradual loading, discussed in SR 3.8.1.3, are M I"$ for Ybo i

applicable to this SR.  !

I> In order to ensure that the DG is tested under load o9 he fe.s{- G.e., conditions that are as close to design conditions as possible, testing must be performed using a power factor 2.~L hours) :s 0.9. This power factor is chosen to be representative of the actual design basis inductive loading that the DG could ef.IT}- experience.

3 gg The 18 month Fiequency is consistent with thp h recommendations of Regulatory Guide Q q 1Ref. 9)

(pa agrap.h 2.a.(3); takes into consideration plant conditions rec [utred to perform the Surveillance; and is intended to be consistent with expected fuel cycle lengths.

(continued)

)

CLINTON B 3.8-24 Revision No. 3-1 l

.e

AC Sources-Operating 8 3.8.1

' BASES

[ I SURVEILLANCE SR 3.8.1.14 (continued)

REQUIREMENTS This Surveillance is modified by two Note. . Note 1 states that momentary transients due to changiag bus loads do not invalidate this test. Similarly, momentary power factor transients above the limit do not invalidate the test. The reason for Note 2 is that during operation with the reactor critical, performance of this SR could cause perturbations to the electrical distribution systems that would challenge continued steady state operation and, as a result, plant safety systems. Credit may be taken for unplanned events that satisfy this SR. Examples of unplanned events may include:

1) Unexpected operational events which cause the equipment to perform the function specified by this Surveillance, for which adequate documentation of the required performance is available; and
2) Post maintenance testing that requires performance of.

this Surveillance in order to restore the component to OPERABLE, provided the maintenance was required, or performed in conjunction with maintenance required to g maintain OPERABILITY or reliability.

SR 3.8.1.15 This Surveillance demonstrates that the diesel engine can restart from a hot condition, such as subsequent to shutdown from normal Surveillance, and achieve the required voltage and frequency within 12 seconds-. The 12 second time is

' derived from the requirements of the accident analysis to respond to a design basis large break LOCA. The DG's ability to maintain iche required voltage and frequency is tested by those SRs which require DG loading.

The 18 month Frequency is consistent with the recommendations of Regulatory Guide 1.108 (Ref. 9),

paragraph 2.a.(5).

2.hoorh This SR has been modified by two Notes. Note 1 ensures that the test is performed with the diesel sufficiently hot, The-

' requirement that the diesel has operated for at least nour at full load conditions prior to performance of this

( fcontinued)

I kj.e.., egud to or grealer-San 90 pec<.ent W e, e dinooos rabg)

I-

'CLINTON k M 3.8-2 Revision No. 3-1 L . - _ - - - - - - _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ - _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

AC Sources-Operating ,

B 3.8.1 This page incided b ceboih- 1 BASES

)

SURVEILLANCE SR 3.8.1.15 (continued)

REQUIREMENTS

~

Surveillance is based on manufacturer recommendations for achieving hot conditions. Nomentary transients due to changing bus loads do nct invalidate this test. Note 2 allows all DG starts to be preceded by an engine prelube period to minimize wear and tear on the diesel during testing.

SR 3.8.1.16 As required by Rogulatory Guide 1.108 (Ref. 9),

paragraph 2,a.(6), this Surveillance ensures that the manual synchronization and load transfer from the DG to each offsite power source can be made and that the DG can be returned to ready-to-load status when offsite power is restored. It also ensures that the undervoltage logic is reset to allow the DG- to reload if a subsequent loss of offsite power occurs. .The DG is considered to be in ready-to-load status when the DG is at rated speed and voltage, the output breaker is open and can receive an auto-close signal on bus undervoltage, and the load sequence timers are reset. (-

Portions of the synchronization circuit are associated with the DG and portions with the offsite circuit. If a failure in the synchronization requirement of the Surveillance occurs, depending on the specific affected portien of the synchronization circuit, either the DG or the associated offsite circuit is' declared inoperable, The' Frequency of 18 months is consistent with.the recommendations, of R4gulatory Guide 1.108 (Ref. 9),

paragraph 2.a.(6), and takes into consideration, plant conditions required to perform the Surveillance.

This SR is modified by a Note. The reason for the Note is that performing the Surveillance would remove a required offsite circuit from service, perturb the electrical distribution system, and challenge safety systems. Credit may be taken for unplanned events that satisfy this SR.

Examples of unplanned events may includc:

(continued)

CLINTON B 3.8-26 Revision No. O w____-__ _ _ _ _ _ _ _ - _- - - _ - _ - - .

4 AC Sources-0perating 8 3.8.1 BASES SURVEILLANCE Diesel Generator Test Schedule (continued)

( \,

i REQUIREMENTS '

A test interval in excess of 7 days (or 31 days, as appropriate) constitutes a failure to meet SRs and results in the associated OG being declared inoperable. It does not, however and any conse,cutive test count is not reset. constitute a valid test or REFERENCES 1. 10 CFR 50, Appendix A, CDC 17.-

2. USAR, Chapter 8.

t

3. Regulatory Guide 1.9.

i

4. USAR, Chapter 6. _bWsio2).
5. USAR, Chapter 15.
6. Regulatory Guide 1.93.
7. Generic. Letter 84-15, July 2, 1984.

8.

9.

10 CFR 50, Appendix A, 60C'18.

Regulatory Guide 1.108.

(

10. Regulatory Guide 1.137.
11. ANSI C84.1, 1982. '

.12. NUMARC 87-00. Revision 1, August 1991. I

13. IEEE Standard 308.

l- 14.  !

,N IP Ca?culation*19-AN-19.

\ 5' l Teykby Gv;Ae. M, TbsM 3.]

i

(

CLINTON l, B 3.8-32 Revision No. 2-11 c _ ___ _ _ _ _ _ _ _ . - __.. -.___ _ _

j

Retrieved from "https://kanterella.com/w/index.php?title=ML20237C350&oldid=3115819"