ML20003G227

Proposed Tech Specs 3.8 & 4.8 Reflecting Operability of Auxiliary Steam Generator Feedwater Sys

ML20003G227
Person / Time
Site:	Haddam Neck File:Connecticut Yankee Atomic Power Co icon.png
Issue date:	04/30/1981
From:	CONNECTICUT YANKEE ATOMIC POWER CO.
To:
Shared Package
ML20003G226	List: ML20003G225 ML20003G227
References
NUDOCS 8104280491
Download: ML20003G227 (7)

Text

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O DOCKET No. 50-213 ATTACHMENT 1 HADDAM NECK PLANT PROPOSED TECHNICAL SPECIFICATIONS FOR AUTOMATIC INITIATION OF AUXILIARY FEEDWATER APRIL, 1981 8104280YD<

.-4 P00R ORIGINAL.

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3.8 TURBINE CYCLE Applicability:

Applies to the operating status of turbine cycle components for removal of reactor core decay heat.

Obj ective :

To specify conditions of the turbine cycle equipent necessary to insure the capability to remove decay heat from the reactor core.

Specification:

A.

The reactor shall not be critical (except for determination of "just critical" rod position and low power physics teste at or below 10 percent of full power) unless the following conditions are met:

1.

A minimum turbine cycle stem relieving capability of 7,000,000 lb/ hour up to and including 1473 NWt and at power levels in excess of 1473 KWt a minimum turbine cycle steam relieving capability of 9,504.000 lbs-per-hour shall be acailable.

2.

a.

Two steam-driven auxiliary feedwater pumps operable or; b.

With one auxiliary feedwater pump inoperable, restore the inoperable auxiliary feedwater pump to OPERABLE etatus within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in HOT S10TDOWN within the following 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.

3.

a.

The danineralized water storage tank (DWST) shall be OPERABLE with a minisma contained volume of 50,000 gallons of water and the primary water storage tank (PWST) shall be WERABLE with a minimum contained volume of 80.000 gallons of water or; b.

With the DWST inoperable, restore the DWST to OPERABLE status within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in BOT SIBIDOWN within the following 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> or; c.

With the PWST inoperable, within 4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />s:

1.

Restore the PWST to OPERABLE status, or 3-12 1

P00R OR GINAL

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2.

Provide an equivalent supply from an alternate source, or; 3.

Be in at least BOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in HOT SHUTDOWN within the following 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.

4.

System piping and valver directly associated with the above components operable.

B.

1.

The auxiliary feedvater actuation systen instrumentation shall be operable as shown in Table 3.8-1 except that one stems generator vide range level channel at a time may be removed from service for surveillance testing as required.

2.

The auxiliary feedvater actuation system contacts and relays from the main steam generator feed pump breakers shall be operable whenever the auxiliary feedwater system is in automatic.

Basis:

A reactor trip from pcwer requires subsequent renoval of core decay test. Desediate decay heat removal requirements are normally satisfied by the steam bypass to the condensers. Thereafter, core decay heat can be continuously dissipated via the steam bypass to the condenser as feedwater in the steam generator is converted to steam by heat absorption. Normally, the-capability to return feedwater flow to the steam generators is provided by operation of the turbine cycle feedwater system.

3-13

In the event the main feedwater syste should fail, the amtiliary system is autmatically initiated upon coincidence, in either train, of any 2 out of 4 steam generator low low level signals or the coincidence of both electric driven main feed ptap circuit breakers being open if in the automatic mode. Feedwater to the steam generators is maintained by the auxiliary feedwater system, consisting of 2 steam driven, auxiliary steam generator feedwater pumps.

In addition, the auxiliary feedwater system can be initiated manually. In this case, feedwater is available from the demineralized water storage tank by gravity feed to the auxiliary feedwater pump. The specified 50,000 gallons of water in the demineralized water storage tank is adequate for decay heat removal for a period of at least two hours.

Within this period, decay heat removal A - mh are reduced to approximately 150 gpm. W keup water is available during this period from the primary water storage tank which con-tains a mininjm voline of 80,000 gallons. The primary water transfer ;mps can transfer 200 gpm fra the primary water tank to tw dunineralized water tank. An alternate supply can be provided from the 100,000 gallon capacity Recycled Primary Water Storage Tank.

A steam relieving capability of 7,000,000 lbs-per-hour is

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required at power levels up to and including 1473

• t to maintain the pressure in turbine cycle components within ASME code allowable values in the event of a full load rejection at 1473 E t, without a reactor trip or other control action and without fee Nater flow to the steam generators. Similarly, at 1825 W t, a steam relieving capacity of 9,504,000 lbs-per-hour is required to maintain the pressure in turbine cycle components within code values in the event of a full load rejection at 1825

• t.

References:

(1) FDSA Section 8.1 (2) FDSA Section 8.3 3-13A

TABLE 3.8-1 AUT(MATIC AUXILIARY FEEDWATER SYSTEM ACTUATION INSTRUMENTATION TOTAL NO.

CHANNELS TO MINIMUM APPLICABLE ACTION FUNCTIONAL UNIT OF CHANNELS ACTUATE SYS.

CHANNELS MODE REQUIRED a) Manual

,2 1

1 1,2,3,4 1

2/4/ rain 4

1, > 10X*

2 4/ rain b) Automatic steam generator T

T wide range level 4 loops 2/3/ rain 3

1, > 10Ze 2

3/ rain c) Automatic steam generator T

T wide range level 3 loops d) Automatic main ateam 2

2/2 2

1, > 101 1

generator feed pump breakers "T

C Action Statement:

1.

Maintain PMe 3 or 4 O

2.

Place inoperable channel in trip condition when declared inoperable.

C l::C E

• For surveillance testing purposes, system will be placed in " manual" function.

2 3=

r 3-135

d 4.8 AUXILIARY SITAM GENERATOR FEEDWATER SYS11N Applicability:

Applies to periodic testing requirements of the steam-driven auxiliary steam generator feedwater system.

Objective:

To verify the operability of the auxiliary steam generator feedwater system and its ability to respond properly when required.

Specification:

1.

The auxiliary feedwater system shall be demonstrated OPERABLE at least once per 31 days by:

a.

Verifying that each steam turbine driven p mp develops a discharge pressure of greater than or equal to 800 psig at a steam supply pressure of 300 psig.

b.

Functionally testing the automatic auxiliary feedwater initiation steam generator level instrumentation channels and their logic.

c.

Verifying that each non-automatic valve in the i

flow path that is not locked, sealed, or other-wise secured in position, is in its correct position.

2.

The IMST and PWST shall be demonstrated OPERABLE at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> by verifying the contained water vol m e is within its limits.

3.

At refueling intervals, the auxiliary feedwater system shall be demonstrated OPERABLE by:

a.

Verifying the capability of each pump to attain rated flow of 450 gpm.

i b.

Verifying that each automatic valve in the flow j

path actuates to its correct position upon receipt of each auxiliary feedwater actuation l

test signal.

c.

Verifying that each auxiliary feedwater pump starts as designed automatically upon receipt of each auxiliaty feedwater actuation test signal.

t l

Basis:

The monthly testing program will-verify the operability of the auxiliary steam generator feedwater system. The refueling interval test will verify the capability l

of the turbine drive and pump to attain rated flow. A l

flow rate of 450 gpm is sufficient to prevent the steam generators from boiling dry during a period of coincident loss of offsite power and maximum decay heat removal requirements.

l 4-17

Proper functioning of the steam admission valve and subsequent pap start will demonstrate the integrity of the system. Verificatica of correct.

operation will be made both from instrumentation within the main control room and direct visual observation of the ptsp.

Reference:

(1) FDSA - Section 8.3 f

4-17A

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