ML19317G784

Model Tech Specs 3/4 Re Secondary Water Chemistry Limiting Condition for Operation

ML19317G784
Person / Time
Site:	Rancho Seco
Issue date:	06/01/1976
From:	Office of Nuclear Reactor Regulation
To:
Shared Package
ML19317G780	List: ML19317G779 ML19317G784
References
NUDOCS 8004010610
Download: ML19317G784 (4)

Text

e.

MODEL (B)

.. TECHNICAL SPECIFICATIONS PLANTSY'STElkS Q

SEC0_NDARY WATER CIIElilSTRY_.

s LhlilTIltG CONDITION FOR OPERATION

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

APPLICABILITY: Modes 1, 2 and 3.

ACTION:

a.

With the condenser condensate total ' cation conductivity exceeding its Steady State Limit but within its Transient Limit, restore the conductivity to within its Steady State Limit within 7 days; or, be in liOT SHUTOOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />, b.

Wit.h the condenser condensate total cation conductivity exceeding 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.

Uith the total cation conductivity of the' final.feedwater to any steas generator exceeding its Steady State Limit but within its Transient Limit, verify at least once 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 7 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 H0T SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

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 determined 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 conqlenser condensate and steam generator final feedwater for total cation conauctivity.

googolo 6/O 3/4-X o,

l

.(

PLANTSYSTEMS_

BASES 3/4.xxx : SECONDARY WATER CHEMISTRY-Contamination of the steam generator secondary cool' ant can cause Generally, the mos,t potential tube degradation and impair tube integrity.

severe contamination results from condenser iiileakage of causticforaing

~

impurities that may accumulate on the secondary side of the steam gen-erator, or on the high heat flux surfaces of the steam generator tubes can lead to the potential for intergranular stress corrosion cracking.

Monitoring of the condenser condensate by cation conductivity is an-The leakage rate effective means of detecting condenser tube inleakage.

can then be determined by comparing the cation concentration in the. con-The densate with the cation concertiation 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 initiate balance of corrective actions needed to restore the operating secondary coolant.

Monitoring the total solids in the final feedwater 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 tube degradation. These limits provide reasonable assurance that the conditions in the steam generator will minimize the potential for tube degradation during all conditions of operation, and postulated accidents.

These measures ensure the continued protection of the steam generator tubing which is an essential part of the reactor coolant pressure boundary, i

3/4-X

TABLE.3. c,

SECONDARY WATER CHEMISTRY LIMITS Total Cation conductivity Maximum Total

_ umhes/cm2 0 25'c pH 9 25'C Sollds Water Sample Steady State Transient Location Limits Limits Limits Limits Condenser 1( )

1()

N.A.

N.A.

Condensate Final Feedwater 1(.)

1 ( )*

(,) spas ( )

3()

4 R

• May be increased to ( - ) for the first (-

.)hoursduring.startupfrom.HOTSHUTDOWN.

l j

e e

e a

h

('

1 j

-I 4

4 4

y 1

r,.

TABLE 1.1 OPERATIONAL MODES REACTIVITY

% RATED AVERAGE COOLANT MODE CONDITION, K,ff THERMAL POWER

• TEMPERATURE 1.

POWER OPERATION

> 0.99

> 5%

> (305)*F 2.

STARTUP

> 0.99

< 5%

>(305)*F 3.

HOT STANDBY

< 0.99 0'

> (305)*F 4.

HOT SHUTDOWN

< 0.99 0

(305)*F>T,yg>200*F 5.

COLD SHUTDOWN

< 0.99 0

5,200*F 6.

REFUELING **

$,0.95 0

$_140*F

• Excluding decay heat.

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

B&W-STS 1-7 June 1,1976