ML19319A685

Model Tech Specs 3 & 4 Re Limiting Condition for Operation & Surveillance Requirements Re Secondary Water Chemistry for Plant Sys

ML19319A685
Person / Time
Site:	Oconee, Surry
Issue date:	08/18/1976
From:	Office of Nuclear Reactor Regulation
To:
Shared Package
ML19319A683	List: ML19319A682 ML19319A685
References
NUDOCS 7911210642
Download: ML19319A685 (4)

Text

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MODEL (B)

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. TECHNICAL SPECIFICATIONS (b

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PLANT SYSTEMS 1

_ SECONDARY WATER CHEMISTRY _

LIMITING CbSDITION FOR OPERATION

3. xxx The secondary water chemistry shall be maintained within the limits of Table 3.xx.

APPLICABILITY: Modes 1, 2 and 3.

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ACTION:

With the condenser condensate total ' cation conductivity exceeding a.

its Steady State Limit but within its Transient Limit, restore the conductivity to within its Steady State Limit within 7 days; or, be in HOT SHUTOOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

Wit.h the condenser condensate total cation conductivity exceeding b.

its Transient Limit, restore the conductivity to within the Transient Limit within 96 hours0.00111 days <br />0.0267 hours <br />1.587302e-4 weeks <br />3.6528e-5 months <br /> or be in HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

c.

With the total cation conductivity of the' final.feedwater to any stear;1 generator exceeding its Steady State Limit but within its Transient Limit, verify at least or.ce per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> that the pH and maximum total solids in the final feedwater are within the limits of Table 3.XX.

and restore the conductivity to within its Steady State Limit within, days; or, be in HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

d.

With the pH and/or maximum total solids of the final feedwater to any..

steam generator exceeding its limit (s), restore the out-of-limit parameter (s) to within its limit (s) 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 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

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e.

With the total cation conductivity of the final feedwater to any steam generator exceeding its Transient Limit, restore the conductivity to within its limit 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 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

SURVEILLANCE RE0UIREMENTS

4. XXX -

The secondary water chemistry parameters shall be detemined to be within the limits at least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> by analyzing the condenser conden, sate and steam generator final feed. vater for total cation conouctivity.

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PLANT SYSTEMS BASES 3/4.xxx SECONDARY WATER CHEMISTRY-Contamination of the steam generator secondary coolant can cause Generally, the mos,t potential tube degradation and impair tube integrity. severe conta impurities that may accumulate on the secondary side of the steam gen-erator, or on the high heat flux surfaces of the stea.n generator tubes can lead to the potential for intergranular stress corrosion cracking.

Honitoring of the condenser condensate by cation conductivity is an

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The leakage rate effective means of detecting condenser tube inleakage.

can then be determined by comparing the cation concentration in the. con-I The densate with the cation concertration in the condenser cooling water.

cation conductivity of the steam generator final feedwater will indicate when blowdown is required to remove the accumulation of caustic forming Monitor-impurities and the scale forming solids in the steam generator.

ing the pH and free hydroxide the final feedwater provides a means to 7

initiate balance of corrective actions needed to restore the operating secondary coolant. Monitoring the total solids in the final feedwater

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will indicate the potential accumulation of solids and the necessity for blowdown to minimize sludge buildup.

Controlling the secoridary water chemistry within the specified limits will control the potential accumulation of corrosive impurities in the steam generator and minimize tuce degradation. These limits provide reasonable assurance that the conditions in the steam generator will J

minimize the potential for tube degradation during all conditions of These measures ensure the continued operation, and postulated accidents.

protection of the steam generator tubing which is an essential part of the reactor coolant pressure boundary.

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O 3/4-X

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TABLE 3. n.

SECONDARY WATER CHEMISTRY LIHITS' Total Cation Conductivity Maximum Total vmhos/cm2 0 25*C pH 9 25'C_

Sollds Water -Sample Steady State Transient Location Limits Limits Limits limits Condenser 1( )

1()

N.A.-

M.A.

Condensate 1()

Final Feedwater 1( )

1 ( )*

(.)Spuf( )

1

.y

- ) for the first (-

.) hours during.startup from. HOT SHUTDOWN.

• May be increased to (

u H

i 6

8 g

4 0

4 f

g g

4

. TABLE 1.xx '

OPERATIONAL MODES REACTIVITY

'%RdTED

' AVERAGE COOLANT CONDITION, K,ff THERIML POWER

• TEMPERATURE PSDE

' 5%

> 350*F

1. POWER OPERATION 3,,0.99 1

99

< 5%

1 350*F.

j 0

2.

STARTUP 3.

HOT STANOBY

< 0.99 0

> 350*F 0

4.

HOT SHUTDOWN

< 0.99 350*F > T'#9'

>.200*F

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5.' COLD SHUTDOWN

. < 0.99 0

< 200*F REFUELIN'G**

< 0.95 0

< 140*F 6.

Excluding decay heat.

• • Reactor vessel head unbolted or removed and fuel in the vessel.

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