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Boric Acid Concentration Reduction Effort Technical Bases & Operational Analysis St Lucie Power Plant Unit 1.
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Issue date:	09/30/1991
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ENCLOSURE 1 to FPL Letter L-94-021 BORIC ACID CONCENTRATION REDUCTION EFFORT CEN - 353 (F)

TECHNICAL BASES AND OPERATIONAL ANALYSIS SAINT LUCIE POWER PLANT UNIT 1 Prepared for Florida Power and Light Company By Combustion Engineering, Inc.

Revision 3 - September, 1991 Page 1 of 118 940g07017g 940222 PDR PDR

ab o Co tents Sectio Pa e 1.0 Introduction Purpose and Scope 1.2 Report Organization 1.3 Past vs. Present Methodology for 7 Setting BAMT Concentration 2.0 Technical Bases for Reducing BAMT Concentration 2.1 Boric Acid Solubility 2.2 Method of Analysis and Assumptions 2.2.1 RCS Boron Concentration vs. Temperature 2.2.2 Impact of Various Cooldown Rates 13 2.2.3 Applicability to Future Reload Cycles 14 2.2.4 Boron Mixing in the RCS and in the 14 Pressurizer 2.3 Borated Water Sources - Shutdown 15 (Modes 5 and 6) 2.3.1 Boration Requirements for Modes 15 5 and 6 2.3.2 Assumptions Used in the Modes 15 5 and 6 Analysis 2.3.3 Modes 5 and 6 Analysis Results 16 2.3.4 Refueling Water Tank Boration 20 Requirements - Modes 5 and 6 CEN-353(F), Rev. 03 Page 2 of 118

Boric Acid Concentration Reduction Effort

'Technical Bases and Operational Analysis CEN - 353 (F) 1.1 PURPOSE AND SCOPE This report defines the methodology and outlines the technical bases which allows a reduction in the boric acid makeup tank (BAMT) concentration to the point where heat tracing of the boric acid makeup system is no longer required in order to prevent boric acid precipitation. The"basic methodology or procedure used to set the minimum BAMT concentration and level for Modes 1, 2, 3, and 4 is derived from the safe shutdown requirements of NUREG 0800 Branch Technical Position RSB 5-1, "Design Requirements for the Residual Heat Removal System", (BTP 5-1). The St. Lucie Unit 1 plant has been classified as a Class 3 plant. Two independent boration sources are provided to compensate for reactivity changes and all expected transients throughout core life. These boration sources are the boric acid makeup tanks (BAMT) and the refueling water tank (RWT). This report reexamines the design basis used to establish BAMT boron concentration and volume requirments.

In addition the minimum RWT volume requirements 'for RCS boration are recalculated. Specifically, sufficient dissolved boric acid is maintained in these tanks in order to provide the required shutdown margin of Technical Specification 3.1.1.1 for a cooldown from hot standby to cold shutdown conditions. In addition, the minimum BAMT concentration and level for Modes 5 and 6 are based upon the ability to maintain the required shutdown margin in Technical Specification 3.1.1.2 following xenon decay and cooldown from 200 degrees to 135 degrees.

CEN-353(F), Rev. 03 Page 5 of 118

The work detailed in this report was performed specifically for the St.

Lucie Unit 1 plant. The calculation performed herein and the values obtained should be applicable to future cycles. (See Section 2.2.3 below). The physics parameters used in this analysis were conservatively selected to bound core physics parameters for the remainder of plant life. Future cycle core physics parameters will be compared to the data in Appendix 5 to ensure that this calculation is bounding. The curve in Figure 3.1-1 of Technical Specification 3.1.2.8 and the values in 3.1.2.7 may change slightly; however, there should not be a need to heat trace the majority of the boric acid system for the remainder of plant life.

Revision 3 of this document was performed to support a reduced boric acid tank volume for St. Lucie Unit I which is intended to be sufficient to allow Florida Power and Light (FP&L) to store the volume required to maintain adequate shutdown margin in one boric acid make-up tank rather than two. Specifically, the analysis performed to support the original boron requirements was re-evaluated to incorporate the revised fuel physics data forwarded by FP&L for the specific purpose of demonstrating 1

lower required boric acid tank volumes.

1.2 REPORT ORGANIZATION This report has been organized into three general sections:

Introduction, Technical Bases, and Operational Analysis. The Technical Bases Section 2.0, outlines the methodology which allows a significant reduction in boric acid makeup tank concentration and presents the results of the detailed calculations performed in support of the Technical Specifications. Separate calculations were performed for Specification 3.1.2.7 (Borated Water Source - Shutdown), Specification 3.1.2.8 (Borated Water Source - Operating), and Specific'ation B3/4.1.2 (Boration Systems Bases). For completeness the volume requirements of the refueling water tank have been recalculated to demonstrate that the boration requirements for reactivity control in Modes 1, 2, 3 and 4 are CEN-353(F), Rev. 03 Page 6 of 118

Ta e o Conte ts cont t e 2.4 Borated Water Source - Operating 24 (Modes 1, 2, 3, and 4) 2.4.1 Boration Requirements for Modes 24 1, 2, 3, and 4 2.4.2 Assumptions Used in the Modes 24 1, 2, 3, and 4 Analysis 2.4. 3 Modes 1, 2, 3, and 4 Analysis 25 Results 2.4.4 Simplification Used Following 29 Shutdown Cooling Initiation 2.4.5 Refueling Water Tank Boration 30 Requirements - Modes 1, 2, 3 and 4 2.5 Boration Systems - Bases 32 2.6 Response to Typical Review Questions 33 3.0 Operational Analysis 86 3.1 Introduction to the Operational 86 Analysis 3.2 Response to Emergency Situations 86 3.3 Feed-and-Bleed Operations 87 3.4 Blended Makeup Operations 89 CEN-353(F), Rev. 03 Page 3 of 118

Table o o te ts cont Sect n Pa e 3.5 Shutdown,to Refueling - Mode 6 90 3.6 Shutdown to Cold Shutdown - Mode 5 93 3.7 Long Term Cooling and Containment 95 Sump pH 4.0 References 118 Appendix 1 Derivation of the Reactor Coolant System Feed-and-Bleed Equation Appendix 2 A Proof that Final System Concentration is Independent of System Volume Appendix 3 Methodology for Calculating Dissolved Boric Acid per Gallon of Water Appendix 4 Methodology for Calculating the Conversion Factor Between Weight Percent Boric Acid and ppm Boron Appendix 5 Bounding Physics Data Inputs CEN-353(F), Rev. 03 Page 4 of 118

much less than the emergency core cooling requirements. Also included in Section 2.0 are the technical responses to typical questions asked by the NRC during review of similar submittals by other nuclear facilities. The Operational Analysis Section, Section 3.'0, outlines the impact on normal operations of a reduced boric acid makeup tank concentration. The types of operations evaluated in Section 3.0 include feed-and-bleed, blended makeup, shutdown to refueling, and shutdown to cold shutdown. All tables and figures are contained at the end of each section for easy reference.

1.3 PAST vs. PRESENT METHODOLOGY OF SETTING BAMT CONCENTRATION Prior to the development of the new methodology for setting BAMT concentration and level described in this report, the level and concentration specified in the plant Technical Specifications for Modes 1, 2, 3, and 4 were based upon the ability to perform a cooldown to cold shutdown in the absence of letdown. (Safe Shutdown requirements of NUREG-0800 BTP 5-1 event). The RCS was borated to the boron concentration required to provide a shutdown margin of 3,6S delta k/k at 200 degrees prior to commencing plant cooldown. In the limiting situation where letdown was not available, this boration was accomplished by charging to the RCS while simultaneously filling the pressurizer.

Since boron concentration typically had to be increased by 800 ppm or more prior to commencing cooldown, highly concentrated boric acid solutions were required due to the limited space that was available in the pressurizer.

Relatively recent advances have made it possible to develop new methodologies for setting BAMT concentration and levels. The methodology for setting concentration and level of Modes 1, 2, 3, and 4 described in IL this report differs from previous methodologies in that boration of the reactor coolant system is performed concurrently with plant cooldown, i.e., concentrated boric acid is added concurrently with cooldown as part of normal inventory makeup due to coolant contraction. By knowing the CEN-353(F), Rev. 03 Page 7 of 118

exact boron concentration required to maintain proper shutdown margin at each temperature during a plant cooldown, BAMT concentration can be decoupled from pressurizer volume. As a result, the concentration of boric acid required to be maintained in the boric acid makeup tanks in order to perform a cooldown without letdown to cold shutdown conditions can be lowered to a range of 2.5 to 3.5 wt%, where heat tracing of the boric acid system is no longer required, i.e., the ambient temperatures that normally exist in the plant's auxiliary building are sufficient to prevent boric acid precipitation.

Similarly, a new methodology was developed for setting the minimum concentration and level of the boration source required to be operational in Modes 5 and 6. Since letdown is available in Mode 5 and 6 cooldown scenarios, a feed and bleed can be conducted to increase RCS boron concentration. Additionally boration can be conducted concurrently with cooldown as part of normal system makeup. By insuring that the boron concentration is maintained greater than that required for proper shutdown margin at each temperature, the boric acid makeup tank concentration for Modes 5 and 6 can be lowered to 2.5 weight percent.

2.0 T CH C L B 0 EDUC NG B CO CE TIO 2.1 BORIC ACID SOLUBILITY Figure 2-1 is a plot showing the solubility of boric acid in water for temperatures ranging from 32 to 160 degrees. (Data for Figure 2-1 was obtained from Reference 4.1 and is reprinted in Table 2-1.) Note that the solubility of boric acid at 32 degrees is 2.52 weight percent and at 50 degrees is 3.49 weight percent. At or below a concentration of 3.5 weight percent boric acid, the ambient temperature that normally exists in the auxiliary building will be sufficient to prevent precipitation within the boric acid makeup" system.

CEN-353(F), Rev. 03 Page 8 of 118

2.2 METHOD OF ANALYSIS AND ASSUMPTIONS 2.2.1 Bo o ce t ation vs Tem erature 2.2.1.1 Operating Modes 1, 2, 3 and 4 As stated in Section 1.3 above, the methodology developed to allow a significant reduction in the boric acid concentration required to be maintained in the BAMTs in Modes 1, 2, 3, and 4 differs from the previous methodology in that boration of the reactor coolant system is performed concurrently with cooldown in order to insure proper shutdown margin, i.e., concentrated boron is added as part of normal system makeup during the cooldown process. To employ a methodology allowing boration concurrent with cooldown, the exact boron concentration required to be present in the reactor coolant system must be'known at any temperature during the cooldown process. In addition, in order to insure applicability for an entire cycle, a cooldown scenario must be developed which is conservative in that it places the greatest burden on an operator's ability to control reactivity, i.e., this scenario must define the boration requirements for the most limiting time in core cycle. Such a limiting scenario is as follows:

1. Conservative core physics parameters were used to determine the required boron concentration and the required Boric Acid Makeup Tank

'olumes to be added during plant cooldown. End-of-cycle initial boron concentration is assumed to be zero. End-of-cycle moderator cooldown effects are used to maximize the reactivity change during the plant cooldown. End of cycle (EOC) inverse boron worth data was used in combination with EOC reactivity insertion rates normalized to the most Negative Technical Specification Moderator Temperature Coefficient (MTC) limit since it was known that this yields results that are more limiting than the combination of actual MTC and actual IBW values at all periods through the fuel cycle prior to CEN-353(F), Rev. 03 Page 9 of 118

end-of-cycle. These assumptions assure that the required boron concentration and the Boric Acid Makeup Tank minimum volume requirements conservatively bound all plant cooldowns during core life.

2. The most reactive rod is stuck in the full out position.

3. Prior to time zero, the plant is operating at 100% power with 100%

equilibrium xenon. Zero RCS leakage.

4. At time zero, the plant is shutdown and held at hot zero power conditions for 25.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months . (The xenon peak after shutdown will have decayed back to the 100% power equilibrium xenon level. Further xenon decay will add positive reactivity to the core during the plant cooldown.) No credit was taken for the negative reactivity effects of the xenon concentration peak following the reactor shutdown.

5. At 25.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months , offsite power is lost and the plant goes into natural circulation. All non-safety grade plant equipment and components are lost. During the natural circulation the RCS average temperature rises 25'F due to decay heat in the core. The initial temperature at the start of the cooldown is 557'F.

CEN-353(F), Rev. 03 Page 10 of 118

6. Approximately 0.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months later, at 26 hours3.009259e-4 days 0.00722 hours 4.298942e-5 weeks 9.893e-6 months , the operators commence a cooldown to cold shutdown.

The scenario outlined above was used to generate the boration requirements for Modes 1, 2, 3, and 4 (Specification 3.1.2.8). It produces a situation where positive reactivity will be added to the reactor coolant system simultaneously from two sources at the time that a plant cooldown from hot shutdown is commenced. These two reactivity sources result from a temperature effect due to an overall negative isothermal temperature coefficient of reactivity, and a poison effect as the xenon-135 level in the core starts to decay below its equilibrium value at 100% power. This scenario, therefore, represents the greatest challenge to an operators ability to borate the reactor coolant system and maintain the required Technical Specification shutdown margin while cooling the plant from hot standby to cold shutdown conditions.

2.2.1.2 Operating Modes 5 and 6 The methodology 'developed for Modes 5 and 6 differs from the method used in previous refueling cycles to determine boration requirements. In this new methodology boration of the reactor coolant system is performed concurrently with cooldown. Concentrated boric acid is added as part of normal system makeup during the cooldown process. To employ a methodology allowing boration concurrent with cooldown, the exact boron concentration required to be present in the reactor coolant system must be known at any temperature during the cooldown process. The following scenario was developed to identify the most limiting cooldown transient for Modes 5 and 6.

l. End-of-cycle conditions with the initial RCS boron concentration necessary to provide shutdown margins of 2.0% delta k/k at 200 degrees and xenon free core. EOC moderator cooldown effects are used to maximize the reactivity change during the plant cooldown.

CEN-353(F), Rev. 03 Page 11 of 118

End-of-cycle (EOC) inverse boron worth data was used in combination with EOC reactivity insertion rates normalized to the most Negative Technical Specification Moderator Temperature Coefficient (MTC) limit since it was known that this yields results that are more limiting than the combination of actual MTC and actual IBW values at all periods through the fuel cycle prior to end-of-cycle.

2. Most reactive rod is stuck in the full out position.

3. Zero RCS leakage.

4. RCS feed-and-bleed can be used to increase boron concentration.

5. RCS makeup is supplied either from the RWT alone or a combination of makeup from the BAMT and RWT.

6. The most limiting scenario for boration in Mode 5 requires that a 2%

delta k/k shutdown be maintained during the cooldown from 200'F to 135'F, The boration requirements for Mode 6 only address maintaining a previously established shutdown margin. If the required shutdown margin for Mode 6 is not maintained, Technical Specification 3.9.1 requires that the RCS be borated at 40 gallons per minute from source of water > 1720 ppm boron. Technical Specification 3.1,2.7 provides three alternative sources to meet this requirement, either BAMT or the RVZ.

The scenario outlined above was used to determine the boration requirements for Modes 5 and 6 (Specification 3.1.2.7). It produces a situation where positive reactivity will'be added to the reactor coolant system due to the overall negative isothermal temperature coefficient of reactivity. Since the core is already assumed to be xenon free there is no contribution to core reactivity due to xenon decay.

CEN-353(F), Rev. 03 Page 12 of 118

2.2.2 Va ous Coo do tes As discussed in the previous Section, a conservative cooldown scenario was selected for use in determining RCS boron concentration levels.

These concentration results were then used to define the minimum Technical Specification boric acid makeup tank inventory requirements.

In the scenario for Modes 1, 2, 3, and 4, positive reactivity was added simultaneously from;two sources at the time that the plant cooldown from hot standby was commenced. The component resulting from an overall negative isothermal temperature coefficient of reactivity is independent of time, but it is directly dependent upon the amount that the system has been cooled. In contrast, the component that results from the decay of xenon-135 below its equilibrium value at 100% power is independent of temperature, but directly dependent upon time. As a result, a slow cooldown rate will require more boron to be added to the reactor coolant system than a fast cooldown rate for a given temperature decrease since more positive reactivity must be accounted for due,to xenon decay. This effect is illustrated in Figure 2-2 and is applicable to the Modes 1, 2, 3, and 4 analysis. Note tha't the bases for Technical Specification 3.1.2.7 require a cooldown following xenon decay. As a result, boration requirements are independent of cooldown rate for the Modes 5 and 6 analysis.

For the purpose of setting the minimum Technical Specification boric acid makeup tank inventory requirements in Modes 1, 2, 3, and 4, reactor coolant system boron concentration data was used that was based upon an overall cooldown rate of 12.5 degree per hour. This slow cooldown rate was chosen in order to be consistent with the time frames specified in Section 6.2 of Reference 4.3 (natural circulation cooldown in CE NSSS) for reactor vessel upper head cooldown. Specifically, 23.07 hours8.101852e-5 days 0.00194 hours 1.157407e-5 weeks 2.6635e-6 months was required in order to take the plant from hot standby conditions to cold shutdown as shown in Table 2-2. For additional conservatism, 5.73 hours8.449074e-4 days 0.0203 hours 1.207011e-4 weeks 2.77765e-5 months was added to this number to arrive at a final total of 28.8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months . An CEN-353(F), Rev. 03 Page 13 of 118

overall cooldown rate, therefore, of 12.5 degrees per hour was required to cool the plant from an average coolant temperature of 557 degrees to an average coolant temperature of 200 degrees in 28.8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months . This cooldown scenario will conservatively bound cooldowns that occur sooner and/or at a higher cooldown rate. The above scenario bounds the reactivity affects of a BTP 5-1 cooldown. It is assumed in the BTP 5-1 scenario that the RHR will be capable of bringing the RCS to cold shutdown conditions within 36 hours4.166667e-4 days 0.01 hours 5.952381e-5 weeks 1.3698e-5 months . With respect to Xenon reactivity affects the scenario used in this report bounds the 36 hour4.166667e-4 days 0.01 hours 5.952381e-5 weeks 1.3698e-5 months cooldown time frame of BTP 5-1 (26 hours3.009259e-4 days 0.00722 hours 4.298942e-5 weeks 9.893e-6 months to let Xenon return to 100% equilibrium level and 28 hours3.240741e-4 days 0.00778 hours 4.62963e-5 weeks 1.0654e-5 months for a slow cooldown).

2.2.3 cabi t to Future' oad C c es To ensure that the current analysis would be valid for future cycles, data from St. Lucie 1 Cycle 6 was conservatively bounded. The physics data used in this analysis should bound future fuel cycles of similar reload cores. Appendix 5 contains bounding physics assumptions that were used to produce the required boron concentration values's long as these inputs are more conservative than the reload cycle physics parameters, the values produced in this analysis will bound the boron concentration values for the future reload cycles.

2.2.4 t e C a d t e Pressu e Throughout the plant cooldowns performed in Section 2.3 and Section 2.4 below, a constant pressurizer level was always assumed, i.e., plant operators charged to the RCS only as necessary to makeup for coolant contraction. The driving force is small, in this situation, for the mixing of fluid between the reactor coolant system and the pressurizer.

As a conservatism, however, complete and instantaneous mixing was assumed between all makeup fluid added to the reactor coolant system through the CEN-353(F), Rev. 03 Page 14 of 118

loop charging nozzles and the pressurizer. Further, various pressure reductions were performed during the plant cooldown process as indicated in Section 2.4. These pressure reductions are necessary since the shutdown cooling system is a low pressure system and is normally aligned at or below an RCS pressure of 268 psia. Typically, such depressurizations are performed using the auxiliary pressurizer spray system under conditions where the reactor coolant pumps are not running.

As an added conservatism in the Modes 1, 2, 3, and 4 analysis, any boron added to the pressurizer via the spray system was assumed to stay in the pressurizer and not be available for mixing with the fluid in the remainder of the RCS.

2.3 BORATED WATER SOURCES - SHUTDOWN (MODES 5 AND 6) 2.3.1 o at e u e ents d 6 As stated in the plant Technical Specifications, the boration capacity required below a reactor coolant system average temperature of 200 degrees is based upon providing a shutdown margin of 2.0% delta k/k following xenon decay and a plant cooldown from 200 degrees to 135 degrees. From this basis the required RCS boron concentrations were determined using conservative core physics, data. 'he results of these

~ calculations are contained in Table 2-3. The results contained in Table 2-3 are plotted as the required shutdown curve in Figure 2-3. Note that a total boron concentration increase of 58.7 ppm for St, Lucie 1 was required for the cooldown.

2.3.2 t ns Used 'he odes 5 a d 6 s s A complete list of assumptions and initial conditions used in calculating the minimum boric acid makeup tank inventory requirements for Modes 5 and 6 is contained in Table 2-4. In the process of taking the plant CEN-353(F), Rev. 03 Page 15 of 118

from hot standby to cold shutdown, the shutdown cooling system (SDCS) will normally be aligned when the RCS temperature and pressure have'een lowered to approximately 325 degrees and 268 psia for St. Lucie l. As shown in the next Section, the total system volume, i.e., RCS"volume plus PZR volume plus SDCS volume, is required to be known for the Modes 5 and 6 analysis. The exact volumes of the reactor coolant'ystem and the pressurizer are known. The exact volume of the shutdown cooling system, however, is not known. (Best estimate calculations for this volume have yielded values from approximately 2500 ft 3 to approximately 3000 ft 3

).

'For the purpose of the analysis in the following Section, the volume o f the shutdown cooling system will be chosen conservatively large, equal to the RCS volume, so as to yield conservative results with respect to minimum boric acid makeup tank inventory requirements.

The exact system volume used in the Modes 5 and 6 calculation is as follows:

2 x (RCS volume) + (PZR volume at 0% power),

or 2(9601 ft ) + (460 ft ) ~66~ft 3 2.3.3 e a d 6 a s esu ts As stated in Section 2.3.1, the boration capacity required below a reactor coolant system average temperature of 200 degrees is based upon providing shutdown margins of 2.0% delta k/k for St. Lucie 1 following xenon decay and a plant cooldown from 200 degrees to 135 degrees. The operating scenario that will be employed for the purpose of determining CEN-353(F), Rev. 03 Page 16 of 118

reactor coolant system boron concentration and ensuring that proper shutdown margin will be maintained is as follows:

A. The systems are initially at 200 degrees and 268 psia. Initial concentration in the reactor coolant system, pressurizer, and in the shutdown cooling system is 595.0 ppm boron. (See Table 2-4 for a complete list of assumptions).

B. Perform a plant cooldown from an average temperature of 200 degrees to an average temperature of 135 degrees makeup water from the BAMT (2.5 weight 0 boric acid solution at 70 degrees). Charge only as. necessary to makeup for coolant contraction.'sing From Equation 2.0 of Appendix 3 and the conversion factor that is derived in Appendix 4, the initial boric acid mass in the system can be calculated as follows:

595 0 0 t + 460 t 48 34 m wt 0 0166 t 3 ibm 0 018 4 ft3 ibm, 100 - (595.0 ppm)/(1748.34 ppm/wt. 0) or

<<4029.4 ibm boric acid Knowing the initial mass of boron in the system, the exact concentration and

~

makeup requirements can be calculated for each 10 degrees of a cooldown from 200 degrees to 135 degrees. These values are contained in Table 2-6.

Equations used to obtain the values shown in Table 2-6 are as follows:

Shrinkage Mass 19,202 (1/vf - 1/vi)

Water Vol. (Shrinkage Mass) / (8.329 ibm/gallon) (1)

Boric Acid Added (Water Vol.) x (0.21356 ibm/gallon) (2)

Total Boric Acid - (Initial Boric Acid) + (Boric Acid Added)

CEN-353(F), Rev. 03 Page 17 of 118

Total System Mass (Total Initial Mass) + (Shrinkage Mass) +

(Boric Acid Added)

Final Conc, otal Bo 1 0 48 34 (3)

(Total System Mass)

Note that the initial total system mass of 1,183,930.8 ibm in Table 2-6 was obtained as follows:

(Initial Boric Acid) + (Initial System Water Mass) +

(Pressurizer Water Mass)

- 4029.4 ibm + (19,202 ft3 / 0.01662 ft3 /ibm) +

(460 ft / 0.01874 ft3 /ibm)

- 1,183,930.8 ibm (1) Water density at 70 degrees.

(2) See Appendix 3 for values of dissolved boric acid in water.

(3) See Appendix 4 for the conversion factor between wt. 0 and ppm.

CEN-353(F), Rev. 03 Page 18 of 118

The boration results from the system cooldown from 200 to 135 degrees are plotted as the actual concentration curve in Figure 2-3. As can be seen from this figure,a shutdown margin of greater than the required 2.0% delta k/k was maintained throughout the evaluation. A minimum concentration of 2.5 weight 8 boric acid was therefore specified in the plant Technical Specification 3.1.2.7. The minimum volume that should be specified in the Technical Specification is 3650 gallons. This volume was determined as follows; Makeup volume (4) 3114 ' gallons Arbitrary amount 500.0 gallons for conservatism Total 3614.8 gallons Round up to nearest 3650 gallons 50 gallons (4) Total of values in Water Vol. column of Table 2-6.

CEN-353(F), Rev. 03 Page 19 of 118

2.3.4 Refueling Water Tank Boration Requirements - MODES 5 & 6 The RWT will not provide enough boric acid to compensate for the reactivity inserted during the cooldown if charging is restricted to makeup for coolant contraction only. A system feed-and-bleed must be performed to raise the RCS concentration before the cooldowns is commenced. The initial feed-and-bleed ensures that the actual RCS boron concentration is maintained, above the required boron concentration for a 2.0 delta k/k shutdown margin while the plant is cooled from 200 degrees to 135 degrees.

For St. Lucie 1, in order to calculate the initial increase in boron concentration during the 5600 gallon system feed-and-bleed, Equation 9.0 of Appendix 1 will be used with values as follows:

C 0

595.0 ppm C in 1720 ppm 0 0 6 t b + 460 t 0 0 8 4 t bm 40 gael~os 8.343 (7) ~b min x gallon T - 3535.6 min.

(5) Specific volume of compressed water at 200'F and 268 psia (6) Specific volume of saturated water at 268 psia (7) Density of water at 50'F CEN-353(F), Rev. 03 Page 20 of 118

If one charging pump at 40 gpm (as assumed in calculating the value of T above) is used to conduct the system feed-and-bleeds, 140.05 minutes are t

required (5600 gal/40 gpm 140.05 min). Concentrations vs time for the feed-and-bleeds from equation 9.0 of'Appendix D are therefore:

T me ~Co c 595.0 30 604.5 60 614.0 90 623.3 120 632.6 140 638.7 The feed-and-bleed portion of the cooldown process is indicated on Figure 2-4 as the vertical line. As shown, concentrations were increased from 595.0 ppm to 638.7 ppm following the 5600 gallon feed-and-bleed.

From Equation 2.0 of Appendix 3 and the conversion factor derived in Appendix 4, the mass of boric acid in the system corresponding to concentrations of 633.7 ppm can be calculated as follows:

CEN-353(F), Rev. 03 Page 21 of 118

CM ioo - c 6 8 1 48 4 wt 0016 3 ibm+460 $ 00 84 $ ibm 100 - (638.7ppm)/(1748.34ppm/wt.%)

- 4326 ' ibm boric acid Knowing the masses of boric acid in the system following the feed-and-bleeds, the exact concentrations and makeup requirements can be calculated for each 10 degrees of cooldowns from 200'F to 135'F. These values are contained in Table 2-7. The cooldown assumes a constant pressurizer volume of 460 ft and 3

a constant pressure of 268 psia. In addition, complete mixing between the RCS and the PZR is assumed as discussed in Section 2.2.4 above. Equations used to obtain the values contained in Table 2-7 are as follows:

Shrinkage mass - 19,202 (1/vf - 1/vi)

Mater Vol. (Shrinkage mass) / (8.343 ibm/gallon)

Boric acid added - (water vol.) (0.08289 ibm/gallon)

Total boric acid - initial boric acid + boric acid added Total System mass Total initial mass + shrinkage mass + boric acid added ta 48 4 Final concentration Total System Mass CEN-353(F), Rev. 03 Page 22 of 118

The results of the initial system feed-and-bleed plus the plant cooldown are plotted as Curve 2 in Figure 2-4. Note that throughout the evaluation, a shutdown margin greater than 2.0% delta k/k was maintained as required.

The initial total system mass in Table 2-7 was obtained as follows:

Enitial boric acid mass + initial 'system water mass '+ initial PZR water mass-4326.2'bm + (19,202 ft ) /

3 (0.01662 ft /ibm) + (460 ft ) /

3 (0.01874 ft3

/ibm)

- 1,184,227.6 ibm RWT concentrations of 1720 ppm will therefore be specified in Technical Specification 3.1.2.7 since the proper shutdown margin could be maintained.

The minimum volume will be specified as follows for the RWT cooldown:

Feed-and-Bleed Volume 5,600.0 gallons Makeup Volume 3,109.6 gallons Total 8,709.6 Round up to nearest 9,250.0 gallons 50 + 500 gallons With 60,000 gallons of the RWT unusable, the actual required volumes in the RWT at 1720 ppm is 69,250 gallons for St. Lucie l.

CEN-353(F), Rev. 03 Page 23 of 118

2.4 BORATED WATER SOURCES - OPERATING (MODES 1, 2, 3, and 4) 2.4.1 o e 3 a 4 For this analysis a shutdown margin of 3.6% delta k/k is provided at all temperatures above a reactor coolant system average temperature of 200 degrees. For temperatures at or below 200 degrees, a shutdown margin of 2.0% delta k/k is provided after xenon decay and cooldown to 200 degrees.

From this basis, the required RCS boron concentrations were determined using conservative core physics parameters and the limiting cooldown

~~

scenario outlined in Section 2.2.1 above. The results are plotted as the shutdown curve in Figure 2-5.

2.4.2 ssum t ons Used t e Modes 3 a d 4 nal sis A complete list of assumptions and initi'al conditions used in calculating the minimum boric acid makeup tank inventory requirements for Modes 1, 2, 3, and 4 are contained in Table 2-5. Note that complete and instantaneous mixing between the reactor coolant system and the pressurizer was assumed as stated in Section 2.2.4 for all fluid added to the reactor coolant system via the loop charging nozzles. The mechanism used to implement this assumption in the analysis was to include the pressurizer water mass as part of the total system mass for the purpose of calculating boron concentration. Specifically, boron concentration in terms of weight fraction is defined as follows:

(boron conc.) ss of bo o stem (total system mass) where, if complete mixing is assumed between the RCS and the pressurizer, the total system mass is the sum of the boron mass in the system, the reactor coolant system water mass, and the pressurizer water mass.

CEN-353(F), Rev. 03 Page 24 of 118

Therefore, the initial total system mass of 467,651.2 ibm in Table 2-8 through Table 2-32 for St. Lucie 1 was calculated as follows:

Initial boron mass + Initial RCS water mass + Initial PZR water mass, or 9 601 t 600 ft (8) 0.021567 ft /ibm 0.02669 ft /ibm(9) 2.4.3 Modes 1 3 and 4 Anal sis Resu ts As stated in Section 2.4.1, the boration capacity required below a reactor coolant system average temperature of 200 degrees is based upon providing a 2.0% delta k/k shutdown margin after xenon decay and a plant cooldown to 200 degrees from expected operat'ing conditions. In addition for this analysis a shutdown margin of 3.6% delta k/k is provided at all temperatures above a reactor coolant system average temperature of 200 degrees. In order to perform a plant cooldown from hot standby conditions to cold shutdown and maintain the above shutdown margin at each temperature above 200 degrees, the following operating scenario will be employed:

A. Assuming the initial conditions outlined in Table 2-5, perform a plant cooldown starting from an initial RCS average temperature of 557 degrees to a final average system temperature of 200 degrees.

B. Charge to the RCS only as necessary to makeup for coolant contraction. Charge from the BAMT initially until BAMT is drained, then switch to the RWT for the remainder of the cooldown.

(8) Specific volume of compressed water at 557 degrees and 2200 psia.

(9) Specific volume of saturated water at 2200 psia.

CEN-353(F), Rev. 03 Page 25 of 118

e The exact reactor coolant system boron concentrations versus temperature for plant cooldowns and depressurizations from 557 degrees, and 2200 psia to 200 degrees and 268 psia with a boric acid makeup tank concentration of 3.50 weight percent and a refueling water tank concentration of 1720 ron iss con ppm b oron contained a in Table 2-8. These results are plotted as the actual concentration curve in Figure 2-5. (The exact temperature at which contraction makeup was switched from the BANTs to the refueling water tank was determined via an iterative process. In this process, the smallest boric acid makeup tank volume necessary to maintain the required shutdown margin was calculated for the given set of tank concentrations).

Note that at each temperature during the cooldown process, RCS boron concentration is greater than that required for the shutdown margin of 3.68 delta k/k. Also note in Figure 2-5 that the shutdown margin drops from 3.6% delta k/k to 2.0% delta k/k at an average coolant temperature of 200 degrees. 'ollowing xenon decay the final concentration required to be present in the'ystem at the most limiting time in core cycle are 638.7 ppm boron. Using the scenario outlined on the previous page, the final system concentration will always be at least 80.0 ppm greater than this amount. A detailed parametric analysis was performed for the modes 1, 2, 3, and 4 Technical Specification (Specification 3.1.2.8). In this study, BAMT concentration was varied from 3.5 weight percent boric acid to 2.5 weight percent boric acid and RWT concentration was varied from 1720 ppm boron to 2300 ppm boron. The results are contained in Table 2-9 through Table 2-32. Equations used to obtain the values in these tables as well as Table 2-8 are as follows:

CEN-353(F), Rev. 03 Page 26 of 118

Shrinkage Mass 9601 (1/vf - 1/vi)

BAMT Vol. (Shrinkage Mass) / (8.3290 ibm/gallon) (10)

RVZ Vol. (Shrinkage Mass ) / (8.343 ibm/gallon) (11)

Boric Acid Added (BAMT Vol.) x (mass of boric acid/gallon) (12) or (RVZ Vol.) x (mass of boric acid/gallon) (12)

Total Boric Acid (Initial Boric Acid) + (Boric Acid Added)

Total System Mass (RCS water mass) + (PZR water mass) (13) +

(Total boric acid)

Final Conc. ota Bo c c d 00 48 34 (14)

(Total System Mass)

(10) Density of water at assumed tank temperature 70'F.

(ll) Density of water at assumed tank temperature 50'F.

(12) See Appendix 3 for values of dissolved boric acid in water.

(600 ft ) / (specific volume at indicated P sat ).

3 (13) PZR water mass (14) See Appendix 4 for the conversion factor between wt. 0 and ppm.

CEN-353(F), Rev. 03 Page 27 of 118

Note that the value of the total system mass at any temperature and pressure in Table 2-8 through Table 2-32 can be obtained as follows:

RCS water mass + PZR water mass + total boric acid mass-total system mass.

As an example, the value of the total system mass at 200 degrees and 268 psia in Table 2-8 was obtained as follows:

1 60 600 + 2388.6 ibm 0.01662 ft /ibm 0.01874 ft /ibm 612,083.1 ibm.

In a similar manner as in the results of Table 2-8, the concentration results of Table 2-9 through Table 2-32 were compared to the required concentrations at each temperature for a plant cooldown from 557 degrees to 200 degrees which are contained in Table 2-33. In each case, the actual system boron concentrations were greater than that necessary for the required shutdown margin as indicated in Figure 2-5. To set the minimum Technical Specification boric acid makeup tank volume corresponding to the various BAMT and RWT concentrations, the (15) Specific volume of compressed water at 200 degrees and 268 psia.

(16) Specific volume of saturated water as 268 psia.

CEN-353(F), Rev. 03 Page 28 of 118

makeup tank volumes from Table 2-8 through Table 2-32 were compiled into Table 2-34. The volume requirements were rounded up to the nearest 50 gallons, Depressurizing from 2200 psia to 1200 psia is accomplished by providing auxiliary spray from the BAMTs to depressurize the plant to 1200 psia which is below the HPSI pump shutoff head. 1000 gallons has been added to the rounded values determined above in order to provide water for auxiliary spray to provide depressurization from BAMT and Figure 2-6 is produced. These volumes must be contained in the region of the BAMT above zero percent indicated level.

In a similar manner, Figure 3.1-1 of the St. Lucie 1 Technical Specifications is produced with 1000 gallons added. This figure replaces the original Technical Specification Figure 3.1-1.

2.4.4 S m cat o U ed o ow S utdo Coo Init atio In the cooldown and depressurization process assumed in Table 2-8 through Table 2>>32, the plant operators must physically align the shutdown cooling systems at a RCS temperature and pressure of approximately 325 degrees and 268 psia. Following this alignment, the volume and mass of the system that the operator must contend with during any subsequent cooldown will obviously increase by the volume and mass associated with the shutdown cooling system. Further, the total boron mass in the system that the operator is now dealing with will also have increased by the amount of boron in the SDCS prior to alignment. In Table 2-8 through 2-32, as a simplification, no attempt was made to factor into the equations the higher total volume and total boron mess that would result when the shutdown cooling system is placed in service. The use of these simplifications in the Modes 1, 2, 3, and 4 calculations can be justified as follows:

1. At the time that the shutdown cooling system is aligned, makeup is being supplied from the refueling water tank. Therefore, CEN-353(F), Rev. 03 Page 29 of 118

additional makeup that would be required during the cooldown from 300 degrees to 200 degrees due to a larger system volume will not affect the total BAMT volume requirements. This assumption would affect the minimum volume requirement of the RWT in Modes 1, 2, 3, and 4. Since the RWT requirements for emergency core cooling are much greater than the requirements for this cooldown scenario, this simplification does not impact RWT sizing requirements.

2. In a cooldown process where an operator is charging only as necessary to makeup for coolant contraction, the change in boron concentration within the system is independent of the total system volume, i.e., the final system boron concentration 1

is not a function of total system volume. (A proof of this statement is contained in Appendix 2).

3. As stated in Table 2-5 boron concentration in the SDCS is assumed to be equal to reactor coolant system concentration at the time of shutdown cooling initiation. This assumption is in fact a conservatism since the concentration in that system in most situations will be closer to refueling water tank concentration at the time of initiation.

f 2.4.5 uel Wate Ta orat o Re u ements - Modes 1 3 and 4 The refueling water storage tank provides an independent source of borated water than can be used to compensate for core reactivity changes and expected transients throughout core life. It should be noted that in Modes 1,2,3 and 4 the minimum RWT water volume is 401,800 gallons as required by emergency core cooling considerations. The purpose of this section of the report is to demonstrate that the RWT minimum inventory requirement in Modes 1, 2, 3 and 4 to compensate for these reactivity I.

changes during a shutdown are much less than the emergency core cooling CEN-353(F), Rev. 03 Page 30 of 118

requirements. This calculation derives the minimum quantity of RWT water necessary to bring the plant from hot standby to cold shutdown while maintaining the plant at a 3.6S delta k/k shutdown margin. All RCS makeup is supplied by the RWT with a boron concentration 1720 ppm. This cooldown is performed as described below.

A. Perform a RCS feed-and-bleed to raise RCS boron concentration from 0 ppm to 579 ppm boron. This is a three hour feed-and-bleed using three charging pumps.

B. Perform a plant cooldown from an initial RCS temperature of 557 degrees and 2200 psia to 325 degrees and 268 psia. Charge only as necessary to makeup for coolant contraction.

C. Align the shutdown cooling system (SDCS) to the RCS at 325 degrees.

Assume that the SDCS volume is 9601 ft . Assume that the 3

of the SDCS is equal to that of the RCS at time SDCS

'oncentration initiation.

D. Continue cooldown from 325 degrees and 268 psia to a final RCS condition of 200 degrees and 268 psia. Charge only as necessary to makeup for coolant contraction.

Table 2-37 contains the results of the calculated volumes, in Steps A through D. The RWT boration requirements for Modes 1, 2, 3 and 4 has been rounded up to 45,000 gallons. Figure 2-9 shows the RCS boron concentration as the plant cooldown progresses.. As expected the boration requirements imposed on RWT sizing are much smaller than the minimum volume requirements placed on the RWT by emergency core cooling requirements (401,800 gallons).

CEN-353(F), Rev. 03 Page 31 o f 118

2. 5 BORATION SYSTEMS - BASES The BASES section of the technical specifications was developed to demonstrate the boration system capability to maintain adequate shutdown margin from all operating conditions. Section 3/4.1.2 of the plant Technical Specifications will be changed to state the following:

"The boration capability of either system is sufficient to provide a SHUTDOWN MARGIN from all operating conditions of 2.0% delta k/k after xenon decay and cooldown to 200'F ~ The maximum boration capability requirement occurs at EOL from full power equilibrium xenon conditions.

This requirement can be met for a range of boric acid concentrations in the BAMT and RWT. This range is bounded by 4887.7 gallons of 3.5 weight 0 boric acid from the, BAMT and 17,000 gallons of 1720 ppm borated water from the RWT to 8194.5 gallons of 2.5 weight 0 boric acid from the BAMT and 13,000 gallons of 1720 ppm borated water from the RWT.

The 17,000 gallon RWT volume for St. Lucie 1 in Section 3/4.1.2 of the plant Technical Specifications was obtained by assuming RCS makeup was provided from the BAMT and the RWT. Total RCS makeup due to the coolant contraction during cooldown is calculated as described in A, B and C below. This yielded a contraction volume of 20,965.2 gallons. From this volume the minimum BAMT volume for the RWT,at 1720 ppm boron from Table 2-34, 4887.7 gallons was subtracted yielding 16,077.5 gallons, which was rounded up to 17,000 gallons. As a result of the addition of 3.5 weight 0 boric acid from the BAMT, a feed-and-bleed is not required to maintain the shutdown margin of 2.0$ delta k/k. Table 2-35 shows how this RWT volume was calculated.

The'13,000 gallon RWT volume was obtained in a similar manner for the BAMT at 2.5 weight 8 boric acid. The maximum BAMT volume for the RWT at 1720 ppm boron from table 2-34, 8194.5 gallons, was subtracted from the CEN-353(F), Rev. 03 Page 32 of 118

contraction volume, yeilding 12,770.7 gallons, which was rounded up to 13,000 gallons. Table 2-36 shows how this volume was calculated.

A. Perform plant cooldowns from 557 degrees and 2200 psia to 325 degrees and 268 psia using the RWT at 1720 ppm boron and 50 degrees.

Charge only as necessary to makeup for coolant contraction. (See Table 2-5 for complete list of assumptions and initial conditions).

B. At 325 degrees and 268 psia align shutdown cooling system. Assume that the volume of the shutdown cooling system is 9,601 ft3 as discussed in Section 2.3.2 above. Assume that the concentration of the shutdown cooling system is equal to that of the reactor coolant system at the time of shutdown cooling initiation.

C. Continue system cooldown from 325 degrees and 268 psia to 200

'egrees and 268 psia using the RWT. Charge only as necessary to makeup for coolant contraction.

A plant cooldown using water from the RWT alone is discussed in Section 2.4.5 of this report. This cooldown scenario provides the minimum RWT water volume requirement for plant cooldown considerations of 45,000 gallons. This number is contained in Technical Specification Bases 3/4.1.2.

2.6 RESPONSE TO REVIEW QUESTIONS This Section of the report details the responses to the typical questions asked during the review of the Technical Specifications.

Question 1: What are the uncertainties and conservatisms associated with the two curves shown in Figure 2-5 of this report2 CEN-353(F), Rev. 03 Page 33 of 118

Response to Question 1:

The lower curve in Figure 2-5 of this report represents an upper bound on the minimum concentrations required to be present in the reactor coolant system for a required shutdown margin at the indicated temperatures. In the computer analyses that were performed to generate these curves, appropriate analytical and measurement uncertainties as well as appropriate conservatisms were included to ensure that an upper bounding curve was obtained. -The major uncertainties and conservatisms that were factored into the required shutdown curve of Figure 2-5 was as follows:

l. Initial scram is assumed to take place from the hot full power PDIL (power dependent insertion limit) to all rods in, with the worst case rod stuck in the full out position.

2. A bias and uncertainty of -10% was applied to the scram worth for the Unit 1 data.

3. A conservative correction was applied to the St. Lucie Unit 1 moderator cooldown data to adjust the cooldown curve to the

-4 Technical Specification MTC of -2.8 x 10 'elta-rho/'F.

4. A combined bias and uncertainty of 10% was .applied to the corrected moderator data.

5. A bias of 15% and an uncertainty of 15% was applied to the Doppler data.

6. The assumption that the cooldown begins at 26 hours3.009259e-4 days 0.00722 hours 4.298942e-5 weeks 9.893e-6 months is conservative in relation to the buildup and decay of Xenon.

Since appropriate analytical and measurement uncertainties as well as appropriate conservatisms associated with the analysis were factored into CEN-353(F), Rev. 03 Page 34 of 118

the lower curve in Figure 2-5, it is not necessary to 'factor any additional uncertainties or conservatisms directly into the upper curve shown in that figure. Although no additional uncertainties were included in the upper curve, the cooldown scenario followed by the operator was specifically chosen to be conservative such that the actual concentration curve in Figure 2-5 in effect represents a lower bound on the boron concentration that can be achieved by an operator given a certain boric acid makeup tank (BAMT) level and boron content. Specifically, conservatisms in the cooldown scenario were insured in two ways. First, the cooldown was conducted assuming a constant pressurizer level, i.e.,

plant operators charged to the reactor coolant system only as necessary to makeup for coolant contraction. As a result, boron concentration in the reactor coolant system can be increased above the upper curve in Figure 2-5 by over-charging during the cooldown process, i.e., charge in excess of the makeup required for coolant contraction by allowing pressurizer level to increase, Second, the BAMT volumes obtained in Table 2-8 through Table 2-32 of this report were rounded up to the nearest 50 gallons and 1000 gallons were added in order to give the final results that appear in Figure 2-6. Boron concentration in the reactor coolant system, therefore, can be increased further since more inventory is available in the BAMTs than that used to generate the actual concentration curve in Figure 2-5.

~estion 2: What are the implications of a reduction in boric acid makeup tank concentrations with respect to plant emergency procedures and Combustion Engineering's Emergency Procedure Guidelinest Response to ~estion 2:

As stated in Section 3.2 of this report credit is not taken for boron addition to the reactor coolant system from the boric acid makeup tanks for the purpose of reactivity control in the accidents analyzed in CEN-353(F), Rev. 03 Page 35 of 118

Chapter 15 of the plant's Final Safety Analysis Report. The response of an operator, therefore, to such events as steam line break, overcooling, boron dilution, etc., will not be affected by a reduction in BAHT concentration. In particular, the action statements associated with Technical Specification 3.1.1.2 require that boration be commenced at greater than 40 gallons per minute using a solution of at least 1720 ppm boron in the event that shutdown margin is lost. Such statements are conservatively based upon the refueling water tank concentration and are therefore independent of the amount of boron in the BAMTs.

Similar to the Technical Specification action steps in the event of a loss of shutdown margin, the operator guidance in Combustion Engineering's Emergency Procedure Guidelines (EPGs), CEN-152, Rev. 2, are also independent of specific boron concentrations within the boric acid makeup tanks. Specifically, the acceptance criteria developed for the reactivity control section of the Functional Recovery Guidelines of CEN-152 are based upon a boron addition rate from the chemical and volume control system (CVCS) of 40 gallons per minute without reference to a particular boration concentration. Chapter 15 Safety Analysis assume that any makeup from the CVCS be supplied at concentrations of at least 1720 ppm boron (the minimum RWT concentration). The reduction in boron concentration within the boric acid makeup tanks therefore has no impact on, and does not change, the guidance contained in the EPGs.

Question 3: Under natural circulation conditions, show that boron mixing in the reactor coolant system is rapid enough to ensure that proper shutdown margin is maintained during a safe shutdown. What is the effect of various cooldown rates on the mixing process2 If an operator charges only as necessary to makeup for coolant contraction, what is the impact of pressurizer level instrument errors on boron concentrationV CEN-353(F), Rev. 03 Page 36 of 118

Response to Question 3:

As discussed in Section 1.1 of this report the basic methodology or procedure used to set the minimum boric acid makeup tank (BAHT) level and concentration for Modes 1, 2, 3, and 4 is derived from the safe shutdown requirements of Branch Technical Position,(RSB) 5-1. Specifically, sufficient dissolved boric acid is maintained in these tanks in order to provide the required shutdown margin of Technical Specification 3.1.1.1 for a cooldown from hot standby .to cold shutdown conditions. Further, the methodology outlined in Section 2.0 of the report for Modes 1, 2, 3, and 4 was developed by incorporating appropriate conservatisms to insure that the shutdown margin of 3.6% delta k/k would indeed be satisfied at each temperature during the cooldown process.

These conservatisms include a cooldown scenario that maximized the boration requirements due to xenon decay. In Section 2.0 the cooldown was not commenced until twenty-six hours after the reactor trip. This time interval allowed the post trip xenon to peak and decay back to the pre-trip steady state value. Selecting the low cooldown rate of 12.5 degrees per hour maximized the xenon contribution to the boration requirement by allowing more xenon decay during the cooldown than would have occurred if a more rapid cooldown had been. conducted.

Boron mixing effects were evaluated for natural circulation cooldown conditions specified in the safe shutdown requirements of Reference 4.4.

Just prior to event initiation, the plant is operating at 100% of rated thermal power. Previous operating history is such as to develop the maximum core decay heat load. At time zero, event initiation occurs and offsite power is lost. The reactor coolant pumps deenergize causing a reactor trip, and the plant goes into natural circulation. All non-safety grade equipment is lost, including letdown, and one diesel generator fails to start. The plant is held at these conditions in hot standby for four hours, at which time a cooldown to cold shutdown is CEH-353(F), Rev. 03 Page 37 of 118

commenced. (Section 5.4 of CEN-201(S), Supplement No. 1, contains a computer simulation of the safe shutdown scenario of Reference 4.3 and shows these events).

The exact boration requirements that give a 3.6% shutdown margin for these scenarios are shown in Figure 2-7. (These curves were obtained using conservative core physics parameters. Note that the above shutdown curves in these figures are based upon a 100 degree per hour cooldown rate. A cooldown rate of 100 degrees per hour was selected for the following reasons: First, a fast cooldown rate is more limiting than a slow cooldown with respect to boron mixing since the slope of the required boration curve is greater. The effect of the assumed mixing time (less than thirty minutes) would be more adverse then than a cooldown at a slower cooldown-rate (see Figure 2-7). Second, a 100 degrees per hour cooldown rate is the maximum allowable. For an added conservatism the actual RCS boron concentration was derived by using BAHT concentrations of 2.5 weight percent. (BAMT concentrations of 2.5 weight 8 was selected since these are the lowest values that will be allowed by Technical Specification 3.1.2.8 and since it yields the slowest increases in reactor coolant system concentrations during the cooldown process).

The actual concentration curves were obtained using the methodology outlined in Section 2.4 of this report and includes the following assumptions and conservatisms:

1. No boron addition is credited prior to commencing plant cooldown.

(Note that one charging pump will operate immediately following plant trip in response to pressurizer level shrink as indicated in Section 5.4 of CEN-201(S), Supplement No. 1. Credit for boron addition, however, during this period will not be taken).

2. Pressurizer volume at the start of.-plant cooldown equals 460 ft3 CEN-353(F), Rev. 03 Page 38 of 118

3. Charging will be secured at the start of the plant cooldown and will remain secured until pressurizer level has decreased by 10%. (In the methodology outlined in this report operators were assumed to charge as necessary to maintain a constant pressurizer level. Note that the error associated with pressurizer level is typically + 2 percent, therefore allowing a 10 percent decrease in level before initiating charging is conservative).

4. Following the initial 10% decrease in pressurizer level, charging will be initiated and maintained as necessary to keep pressurizer levels constant for the remainder of the plant cooldown.

5. Complete and instantaneous mixing with all fluid added via the charging nozzles with the contents of the RCS and the pressurizer is assumed. (Note that this assumption in relation to a delay in boron mixing will be discussed below).

The concentration curves that were obtained using these assumptions are shown in Figure 2-7. In order to account for the effects of a delay in the boron mixing process under natural circulation conditions, the actual concentration curve in Figure 2-7 will be shifted to the right by 0.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months . (Note that 30 minutes is consistent with the boron mixing time that was determined in CEN-259 and, in addition, is conservative since CEN-259 also indicates that significant mixing of added boron does occur prior to 30 minutes). These shifts are shown in the expanded graphs shown in Figure 2-8. As can be seen, the concentrations within the reactor coolant system for the 0.5 hour5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months shift curves in Figure 2-8 above the required shutdown curve at each temperature during the cooldown.

CEN-353(F), Rev. 03 Page 39 of 118

Table 2-1 Boric Acid Solubility in Water (1)

Temperature (Degrees F) Wt. S H BO 32 ' 2.52 41.0 2.98 50.0 3.49 59 ' 4.08 68.0 4.72 77.0 5.46 86.0 6.23 95.0 7.12 104.0 8.08 113.0 9.12 122.0 10 '7 131.0 11.55 140.0 12.97 149.0 14.42 158.0 15.75 167.0 17.91 176.0 19.10 (1) Solubility from Technical Data Sheet IC-11, US Borax & Chemical Corporation, 3-83-J,W.

CEN-353(F), Rev. 03 Page 40 of 118

Table 2-2 Time Frames for Determining an Overall RCS Cooldown Rate Initial Hot Standby hold 4.0 hours0 days 0 hours 0 weeks 0 months period (*)

Plant cooldown from 557 to 2.32 hours3.703704e-4 days 0.00889 hours 5.291005e-5 weeks 1.2176e-5 months 325 degrees (¹)

Hold period for cooling the 15.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months reactor vessel upper head Plant cooldown from 325 1.25 hours2.893519e-4 days 0.00694 hours 4.133598e-5 weeks 9.5125e-6 months to 200 degrees (¹)

Additional conservatism 5.73 hours8.449074e-4 days 0.0203 hours 1.207011e-4 weeks 2.77765e-5 months Total 28.8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months

(*) Per the requirements of Branch Technical Position (RSB) 5-1.

(¹) Assume an average cooldown rate of 100 degrees per hour.

CEN-353(F), Rev. 03 Page 41 of 118,

Table 2-3 Required Boron Concentration for a Cooldown from 200 Degrees to 135 Degrees Temperature Concentration (Degrees F) (ppm boron) 200 595.0 190 604.0 180 613.0 170 622.0 160 631.0 150 640.0 140 649.0 135 654.0 (Q) Based upon a 2.0$ delta k/k shutdown margin after xenon decay.

II CEN-353(F), Rev. 03 Page 42 of 118

Table 2-4 Initial Conditions and Assumptions Used in the Modes 5 and 6 Calculation

a. Reactor coolant system volume 9,601 ft3

b. Reactor coolant system pressure 268 psia.

c. Pressurizer volume &60 ft3 .

d. Pressurizer is saturated.

e. Zero reactor coolant system leakage.

f. Boration source concentration >> 2.5 weight 0 boric acid.

g. Boration source temperature - 70 degrees.

h. Initial reactor coolant system concentration ; 595 ppm

i. Initial pressurizer concentration - 595 ppm boron.

3 ~ Complete and instantaneous mixing between the pressurizer and the reactor coolant system. (Refer to discussion on Section 2.2.4 above).

V

k. Constant pressurizer level maintained during the plant cooldown, i.e.,

charge only as necessary to makeup for coolant contraction.

Total system volume (RCS + SDCS + PZR) 19,662 ft3 . (See discussion in Section 2.3.2).

CEN-353(F), Rev. 03 Page 43 of 118

Table 2-5 Initial Conditions and Assumptions Used 0

in the Modes 1, 2, 3, and 4 Calculation

a. Reactor coolant system volume 9,601 ft3

b. Initial reactor coolant system pressure - 2200 psia.

C ~ Pressurizer volume - 600 ft3 (40$ level).

d. Pressurizer is saturated.

e. Reactor coolant system depressurization performed as shown in Table 2-8 through Table 2-32.

Zero reactor coolant system Technical Specification leakage.

g. Initial reactor coolant system concentration 0 ppm.

h. Initial pressurizer concentration - 0 ppm boron.

Complete and instantaneous mixing between the pressurizer and the reactor coolant system. (Refer to discussion on Section 2.2.4 above).

3 ~ Constant pressurizer level maintained during the plant cooldown, i.e.,

charge only as necessary to makeup for coolant contraction.

k. Boron concentration in the SDCS is equal to the boron concentration in the reactor coolant system at the time of shutdown cooling initiation.

Letdown is not available.

m. RWT temperature 50 degrees.

n. BAMT temperature - 70 degrees.

CEN-353(F), Rev. 03 Page 44 of 118

TABLE 2-6 ST. LUCIE UNIT 1 PLANT COOLDONI FROH 200 F TO 135 F; BAHT AT 2.5 at% BORIC ACID tAVG.STS. TEHP PZR PRESS SPECIFIC VOLQIE SHRINKAGE BAHT VOL 8 RMT VOL 9 B/A NIDED TOTAL B/A TOTAL STS HASS FINAL CONC.)

(F) (psla) (cu.ft./Ite) HASS(Iba) 70 F (gal) 50 F (gal) (lba) (Ihn) (lte) (ppa boron) )

TI Tf Vi Vf I

200 200 268 1.00000 1.00000 0.0 0.0 0.0 0.0 4,029.4 1,1&3,930.8 595.0 (

200 190 268 0.01662 0.01656 4,186.1 502.6 0.0 M17.3 4,136.7 1,188,224.2 608.7 )

190 180 268 0.01656 0.01650 4,216.5 506.2 0.0 Nm.l 4,244.8 1, 192,5C&.8 6223 I 180 170 268 0.01650 0.01644 4,247.3 509.9 0.0 IM.9 4,353.7 1,196,905.0 636.0 /

'170 160 268 0.01644 0.01638 4,278.4 513.7 0.0 109.7 4,C63.4 1,201,293. 1 6496 I 160 150 268 0.01638 0.01633 3,5&9A 430.9 0.0 92.0 4,555.5 1,204,974.5 661.0 )

150 140 268 0.01633 0.01628 3,611A 433.6 0.0 92.6 4,648.1 1,208,678.5 672.3 I 140 135 268 0.01628 0.01626 1,814.0 217.8 0.0 46.5 4,694.6 1,210,539.1 678.0 )

TOTAL BAHT VOLWE 3114.8 gallons

TABLE 2-7 ST. LUCIE UNIT 1 PLANT COOLDOUN FROH 200 F TO 135 FI RUT AT 1720 ppm BORON TEHP. PZR PRESS SPECIFIC VOLQtE SHRINKAGE BAHT VOL 8 RIIT VOL 9 8/A ADDED TOTAL B/A TOTAL STS. HASS FINAL CONC. )

IAVG~ STS (F) (psta) (cu.ft./Ibm) HASS(lbm) 70 F (gal) 50 F (gal) (lbm) (ibm) (ibm) (ppm boron) )

I TI Tf VI Vf I

-I 200 200 268 1.00000 1.00000 0.0 0.0 0.0 0.0 4,326.2 1,184,227.6 638.7 i 200 190 268 0.01662 0.01656 4,186.1 0.0 501.7 41.6 4,367.8 1, 188,455.3 6425 I 190 180 268 0.01656 0.01650 4,216.5 0.0 505 4 41.9 4,409.7 1,192,713.7 646.4 )

180 170 268 0.01650 0.01644 4,247.3 0.0 509.1 42.2 4,451.9 1,197, 003.2 650.2 J 170 160 268 0.01644 0.01638 4,278.4 0.0 512.8 42.5 4,494.4 1,201,324.1 654.1 I 160 150 268 0.01638 0.01633 3,589.4 0.0 430.2 35.7 4,530.0 1,204,949.1 657.3 I 150 140 268 0.01633 0.01628 3,611 4 0.0 432.9 35.9 4,565.9 1,208,596.4 660.5 i 140 135 268 0.01628 0.01626 1,814.0 0.0 217.4 18.0 4,583.9 1,210,428 4 662.1 ITOTAL RUT VOLIWE 3109.6 gallons I

I I

TABLE 2-8 ST ~ LUCIE UNIT 1 PLANT COOLDMI FRON 557 F TO 200 F; BANT AT 3.5 wtX BORIC ACID; RUT At 1720 ppn BORON IAVG.SYS. TENP. PZR PRESS SPECIFIC VOLUNE SHRINKAGE BANt VOL Q Rut VOL- a 8/A ADDED tOTAL 8/A TotAL SYS. NABS FINAL CONC.I (f) (psla) f (cu. t./Ibm) MASS(lbm) 70 f (gal) 50 F (gal) (lbm) (lbm) ( lbm) (ppn boron) I Ti Tf VI Vf I 557 557 2200 1.00000 1.00000 0.0 ,

0.0 0.0 0.0 0.0 467,651.2 0.0 I 557 510 2200 0.0215? 0.02032 27,319.3 3,280.0 0.0 990.9 990.9 495,961.3 349.3 I 510 490 2200 0.02032 0.01990 9,972.2 1,197.3 0.0 361.7 1,352.5 506,295.2 467.1 I 490 483 2200 0.01990 0.01976 3,418.3 410.4 0.0 124.0 1,476.5 509,837.4 506.3 I 483 C70 2200 0.01976 0.01951 6,226.0 0.0 746.3 61.9 1,538.4 516,125.3 521.1 I 470 460 2200 0.01951 0.01933 4,582.5 0.0 549.3 45.5 1,583.9 520,753.3 531.8 I 460 450 2200 0.0'1933 0.01916 4,406.9 0.0 528.2 43.8 1,627.7 525,204.1 541.8 I 450 C40 2200 0.01916 0.01900 4,219.8 0.0 505.8 41.9 1,669.6 529,465.7 551.3 I C40 430 2200 0.01900 0.01885 4,021.1 0.0 482.0 40.0 1,709.6 533,526.8 560.2 I 430 420 2200 0.01885 0.01870 4,085.6 0.0 489.7 40.6 1,750.2 537,653.0 569.1, I 420 410 2200 0.01870 0.01855 4,151.7 0.0 C97.6 41.2 1,791.4 541,845.9 578.0 I 410 400 2200 0.01855 0.01S42 3,652.8 0.0 437.8 36.3 1,827.7 545,535.0 585.7 I 400 390 2200 0.01842 0.01828 3,991.9 0.0 478.5 39.7 1,S67.4 549,566.5 594.1 I 390 380 2200 0.01828 0.01816 3,470.6 0.0 416.0 34.5 1,901.8 553,071.6 601.2 I 380 370 2200 0.01816 0.01S04 3,516.8 0.0 421 ~ 5 34.9 1,936.8 556,623.3 608.3 I 370 360 2200 0.01804 0.01792 3,563.9 0.0 427.2 35.4 1,972.2 560,222.6 615 ~ 5 I 360 350 2200 0.01792 0.01781 3,309.1 0.0 396.6 32.9 2,005.1 563,564.6 622.0 I 350 340 2200 0.01781 0.01770 3,350.2 0.0 401.6 33.3 2,038.4 566,9CB.1 628.6 I 340 330 2200 0.01770 0.01759 3,392.1 0.0 406.6 33.7 2,072.1 570,373.9 635.1 I 330 325 2200 0.01759 0.01754 1,555.9 0.0 186.5 15.5 2,087.5 57'I,945.3 638.1 (

325 310 268 0.01754 0.0175C 0.0 0.0 0.0 0.0 2,087.5 581,482.0 627.7 I 310 300 268 0.01754 0.01744 3,138.6 0.0 376.2 31.2 2,118.7 584,651.8 633.6 I 300 260 268 0.01744 0.01707 11,932.7 0.0 1,430.3 118.6 2,237.3 596,703.1 655.5 I 260 235 268 0.01707 0.01687 6,66S.O 0.0 799.2 66.2 2,303.5 603,437.4 667.4 I 235 210 268 0.01687 0.01669 6,137.9 0.0 735.7 61.0 2,364.5 609,636.2 678.1 I 210 200 268 0.01669 0.01662 2,422.9 0.0 290.4 24.1 2,388.6 612,083.1 6S2.3 I I

TOTAL SNIT VOLINE 4887.7 gallons I I

TABLE 2-9 ST. NCIE UNIT 1 PLANT COOLDSN FROI 557 F TO 200 F; BAHT AT 3.25 MtX BORIC ACID; RllT AT 1720 pinn BORON SPECIFIC VOLINIE SHRINKAGE BAHT VOL 0 RMT VOL 0 8/A ADDED TOTAL B/A TOTAL SYS. HASS FINAL CONC.

(AVG.SYS. TEHP. PZR PRESS )

<F) (ps is) <cu. ft./lhn) HASS( lhn) 70 F (gal) 50 F (gal) (ibm) (ibm) (lhn) (ppn boron) )

I Ti Tf Vi Vf I

-I I

557 557 2200 1.00000 1.00000 0.0 0.0 0.0 0.0 0.0 C67,651.2 0.0 i 557 510 2200 0.02157 0.02032 27,319.3 3,2M.O 0.0 917.7 917.7 495,888.2 323.6 )

510 490 2200 0.02032 0.01990 9,972.2 1,197.3 0.0 335.0 1,252.7 506,195.3 432.7 I 490 480 2200 0.01990 0.01970 4,898.1 588.1 0.0 164.5 1,417.2 511,258.0 484.7 )

480 474 2200 0.01970 0.01959 2,836.7 340.6 0.0 95.3 1,512.5 514,189.9 514.3 I 474 460 2200 0.01959 0.01933 6,C92.0 0.0 778.1 6C.S 1,577.0 520,746.4 529.5 (

460 450 2200 0.01933 0.01916 4,C06.9 0.0 528.2 43.8 1,620.8 525,197.2 539.6 I 440 2200 0.01916 0.01900 4,219.8 0.0 505.8 C1.9 1,662.7 529,458.9 549.1 I 450 440 430 2200 0.01900 0.01885 4,021.1 0.0 482.0 40.0 1,702.7 533,519.9 558.0 (

430 420 2200 0.01885 0.01870 4,085.6 0.0 489.7 40.6 1,743.3 537,646.1 566.9 )

410 2200 0.01870 0.01855 4,151.7 0.0 497.6 41.2 1,784.5 SC1,839.0 575.8 'i 420 C10 400 2200 0.01855 0.018C2 3,652.8 0.0 437.8 36.3 1,820.8 5C5,528.1 583.5 )

400 390 2200 0.01842 0.01828 3,991.9 0.0 478.5 39.7 1,860.5 549,559.6 591.9 I 380 2200 0.01828 0.01816 3,470.6 0.0 416.0 34.5 1,895.0 553,064.7 599.0 /

390 380 370 2200 0.01816 0.01804 3,516.8 0.0 421.5 34.9 1,929.9 556,616.4 606.2 /

360 2200 0.0'l804 0.01792 3,563.9 0.0 427.2 35.4 1,965.3 560,215.7 613.3 I 370 360 350 2200 0.01792 0.01781 3,309.1 0.0 396.6 32.9 1,998.2 563,557.7 619.9 I 340 2200 0.01781 0.01770 3,350.2 0.0 401.6 33.3 2,031.5 566,941.2 626.5 i 350 340 330 2200 0.01770 0.01759 3,392.1 0.0 406.6 33.7 2,065.2 570,367.0 633.0 (

330 325 2200 0.01759 0.01754 1,555.9 0.0 186.5 15.5 2,080.6 571,938 4 636.0 )

325 310 268 0.0175C 0.01754 0.0 0.0 0.0 0.0 2,080.6 581,475.1 625.6 )

310 300 268 0.01754 0.01744 3,138.6 0.0 376.2 31.2 2, 111.8 584,644.9 631.5 (

300 260 268 0.01744 0.01707 11,932.7 0.0 1,430.3 118.6 2,230.C 596,696.2 653.5 I 260 235 268 0.01707 0.01687 6,668.0 0.0 799.2 66.2 2,296.6 603,430.5 665.4 )

235 210 268 0.01687 0.01669 6,137.9 0.0 735.7 61.0 2,357.6 609,629.3 676.1 I 210 200 268 0.01669 0.01662 2,422.9 0.0 290.4 24 ~ 1 2,381.7 612,076.2 680.3 (

I

)TOTAL BAHT VOLINE 5406.0 gallons I I

I

TABLE 2.10 ST. LUCIE UNIT 1 PLNIT COOLOONI FROM 557 F TO 200 F; BAMI AT 3.0 vtX BORIC ACID; RUT AT 1720 ge BORON IAVG'SYS TEMP PZR PRESS SPEC IF IC VOLUME SHRINKAGE BAMT VOL Q RNT VOL Q 8/A ADDED TOTAL B/A TOTAL STS. MASS FINAL CONC.I

( (F) (peia) (cu. ft./lba) MASS(ibm) 70 F (gal) 50 F (gal) (ibm) (lba) (ibm) (ppm boron) (

Tl Tf Vi Vf I

-I 557 557 2200 1.00000 1.00000 0.0 0.0 0.0 0.0 0.0 467,651.2 0.0 (

557 510 2200 0.02157 0.02032 27,319.3 3,280.0 0.0 844.9 844.9 495,815.4 297.9 (

510 490 2200 0.02032 0.01990 9,972.2 1,197.3 0.0 30S.4 1,153.4 506,096.0 398.4 (

490 480 2200 0.01990 0.01970 4,898.1 5M. 1 0.0 151.5 1,304.8 511,145.6 446.3 (

480 C70 2200 0.01970 0.01951 4,746.2 569.8 0.0 1C6.8 1,451.6 516,038.6 491.8 I 470 460 2200 0.01951 0.01933 4,582.5 550.2 0.0 1C1.7 1,593.4 520,762.8 534.9 (

460 450 2200 0.01933 0.01916 4,C06.9 0.0 528.2 43.8 1,637.1 525,213.5 545.0 (

450 440 2200 0.01916 0.01900 4,219.8 0.0 505.8 41.9 1,679.1 529,475.2 554 4 (

440 430 2200 0.01900 0.01S85 4,021.1 0.0 482.0 40.0 1,T19.0 533,536.2 563.3 (

430 420 2200 0.01885 0.01870 4,085.6 0.0 489.7 40.6 1,759.6 537,662 4 572.2 (

420 410 2200 0.01870 0.01855 4,151.7 0.0 497.6 C1.2 1,800.9 541,855.3 581.1 (

410 COO 2200 O.OISSS 0.01842 3,652.8 0.0 437.8 36.3 1,837.2 545,544.C 5SS.S (

400 390 2200 0.01842 0.01828 3,991.9 0.0 478.5 39.7 1,876.8 549,576.0 597.1 (

390 380 2200 0.01828 O.O1816 3,470.6 0.0 416.0 34.5 1,911.3 553,081.0 604.2 (

380 370 2200 0.01816 0.01804 3,516.8 0.0 421.5 34.9 1,946.2 556,632.8 611 3 I 370 360 2200 0.01804 0.01792 3,563.9 0.0 427.2 35.4 1,981.6 560,232.1 618.4 (

360 350 2200 0.01792 0.01781 3,309.1 0.0 396.6 32.9 2,014.5 563,574.0 625.0 (

350 3CO 2200 0.01781 0.01770 3,350.2 0.0 401.6 33.3 2,047.8 566,957.5 631.5 (

340 330 2200 0.01770 0.01759 3,392.1 0.0 406.6 33.7 2,081.5 570,383.3 638.0 I 330 325 '2200 0.01759 0.0175C 1,555.9 0.0 186.5 0.0 2,081.5 571,939.3 636.3 I 325 310 26S 0.01754 0.01754 0.0 0.0 0.0 0.0 2,081.5 581,C76.0 625-9 I 310 300 268 0.01754 0.01744 3,138.6 0.0 376.2 31.2 2,112.7 584,645.8 631.8 I 300 260 268 0.01744 0.01707 11,932.7 0.0 1,430.3 118.6 2,?31.2 596,697.1 - 653.8 I 260 235 268 0.01707 0.01687 6,668.0 0.0 799.2 66.2 2,297.5 603,431.3 665.7 I 235 210 268 0.01687 0.01669 6,137.9 0.0 735.7 61.0 . 2,358.5 609,630.2 676.4 I 210 200 268 0.01669 0.01662 2,422.9 0.0 290.4 24 ~ I 2,382.5 612,077.1 680.6 (

I (TOTAL BAMT VOLQIE 6185.C gallons I I I

TABLE 2-11 ST. LUCIE UNIT 1 I PLANt COOLDONI FROM 557 F TO 200 F; BAHt AT 2.75 at% BOR(C AClD; RUT AT 1720 ppn BORON 'I I

)AVG.SZS. TEMP. PZR PRESS SPEClF IC VOLWE SHRlNAGE BAHT VOL Q RlP VOL 9 8/A ADDED TOTAL B/A TOtAL SZS MASS FlNAL CONC I (F) (peia) (cu. ft./tbn) MASS(lhn) 70 F (gal) 50 F (gal) (lbn) (ibm) (ihn) (ppn boron) (

Ti Tf Vi Vf I

-I 557 55? 2200 1.00000 1.00000 0.0 0.0 0.0 0.0 0.0 467,651.2 0.0 /

557 510 2200 0.02157 0.02032 27,319.3 3,280.0 0.0 772.5 772.5 495,743.0 272.4 /

510 490 2200 0.02032 0.01990 9,972.2 1,197.3 0.0 282.0 1,054.5 505,997.1 364.4 (

490 480 2200 0.01990 0.01970 C,898.1 588.1 0.0 138.5 1,193.0 511,033.7 408.1 i 480 C70 2200 0.01970 0.01951 C,?46.2 569.8 0.0 134.2 1,327.2 515,914.1 449.8 ]

470 460 2200 0.01951 0.01933 4,582.5 550.2 0.0 129.6 1,C56.8 520,626.2 489.2 )

460 450 2200 0.01933 0.01916 4,C06.9 529.1 0.0 12C.6 1,581 4 525,157.8 526.5 I C50 4C5 2200 0.01916 0.01908 2,101.0 252.3 0.0 59.4 1,640.8 527,318.2 544.0 (

445 430 2200 0.01908 0.01885 6,139.8 0.0 735.9 61.0 1,701.8 533,519.0 557.7 (

430 420 2200 0.01885 0.01870 4,085.6 0.0 489.7 40.6 1,742.4 537,645.2 566.6 )

420 410 2200 0.01870 0.01855 4,151.7 0.0 497.6 I 1.2 1,783.7 541,838.1 575.5 i 410 400 2200 0.01855 0.01842 3,652.8 0.0 437.8 36.3 1,819.9 545,527.2 583.3 /

400 390 2200 0.01842 0.01828 3,991.9 0.0 478.5 39.7 1,859.6 549,558.8 591.6 I 390 380 2200 0.01828 0.01816 3,470.6 0.0 416.0 34.5 1,894.1 553,063.8 598.8 I 380 370 2200 0.01816 0.01804 3,516.8 0.0 C21.5 34.9 1,929.0 556,615.6 605.9 J 370 360 2200 0.01804 0.01792 3,563.9 0.0 427.2 35.C 1,964.4 560,21C.9 613.1 I 360 350 2200 0.01792 0.01781 3,309.1 0.0 396.6 32.9 1,997.3 563,556.8 619.6 I 350 340 2200 0.01781 0.01770 3,350.2 0.0 401.6 33.3 2,030.6 566,940.3 626.2 I 340 330 2200 0.01770 0.01759 3,392.1 0.0 406.6 33.7 2,06C.3 570,366.1 632.8 f 330 325 2200 0.01759 0.01754 1,555.9 0.0 186.5 15.5 2,079.8 571,937.5 635.8 i 325 310 268 0.01754 0.01754 0.0 0.0 0.0 0.0 2,079.8 581,474.3 625.3 I 310 300 268 0.01754 0.01744 3,138.6 0.0 376.2 31.2 2,110.9 584,644.1 631.3 I 300 260 268 0.01744 0.01707 11,932.7 0.0 1,430.3 118.6 2,229.5 596,695.3 653.3 I 260 235 268 0.01707 0.01687 6,668.0 0.0 799.2 66.2 2,295.7 603,429.6 665.2 I 235 210 268 0.01687 0.01669 6,137.9 0.0 735.7 61.0 2,356.7 609,628.4 675.9 )

210 200 268 0.01669 0.01662 2,422.9 0.0 290.C 24.1 2,380.8 612,075.4 680.1 f I

iTOTAL BAHT VOLUME 6966.8 gallons I I I

TABLE 2-12 ST. LUCIE UNIT 1 PLANT COOLDONN FROH 557 f. TO 200 F; BAHT AT 2.50 MtX BORIC ACID; RllT AT 1720 pfm BORON IAVG'STS TEHP. PZR PRESS SPECIFIC VOLUHE SHRINKAGE BAHT VOL 9 RMT VOL 8 B/A ADDED TOTAL 8/A TOTAL SYS. HASS FINAL CONC. (

(F) (ps3a) (cu.ft./Ibm) HASS(ibm) 70 F (gal) 50 F (gal) (Ibm) (ibm) (ibm) (ppa boron) )

TI TF VI VF I I

557 557 2200 1.00000 1.00000 0.0 0.0 0.0 0.0 0.0 467,651.2 0.0 )

557 510 2200 0.02157 0.02032 27,319.3 3,280.0 0.0 TD0.5 700.5 495,671.0 247.1 )

490 2200 0.02032 0.01990 9,972.2 1,197.3 0.0 255.7 956.2 505,898.8 330.4 )

510 480 2200 0.01990 0.01970 4,898.1 588.1 0.0 125.6 1,081.e 510,922.5 370.2 i 490 2200 0.01970 0.01951 4,746.2 569.8 0.0 121.7 1,203.5 515,790.4 407.9 [

480 470 470 460 2200 0.01951 0.01933 4,582.5 550.2 0 ' 117.5 1,321.0 520,490.4 443.7 (

2200 0.01933 0.01916 4,406.9 529.1 0.0 113.0 1,434.0 525,010.3 477.5 i 460 450 2200 0.01916 0.01900 4,219.8 506.6 0.0 108.2 1,542.1 529,338.3 509.4 f 450 440 430 2200 0.01900 0.01885 4,021.1 482.e 0.0 103.1 1,645.3 533,462.5 539.2 I 440 2200 0.01885 0.01870 4,085.6 . 490.5 0.0 104.8 1,750.0 537,652.8 569.1 I 430 420 2200 0.01870 0.01855 4,151.7 0.0 497.6 41.2 1,791.3 541,845.7 578.0 420 410 1,827.5 545,534.8 i'es.7 410 400 2200 0.01855 0.01842 3,652.8 0.0 437.8 36.3 J 2200 0.01842 0.01828 3,991.9 0.0 478.5 39.7 1,867.2 549,566.4 594.0 /

400 390 2200 0.01828 0.01816 3,470.6 0 ' 416.0 34.5 1,901.7 553,071.4 601.2 )

390 380 2200 0.01816 0.01804 3,516.8 0.0 421.5 34.9 1,936.6 556,623.2 608.3 /

380 370 2200 0.01M4 0.01792 3,563.9 0.0 427.2 35.4 1,972.0 560,222.5 615.4 )

370 360 2200 0.01792 0.01781 3,309.1 0.0 396.6 32.9 2,004.9 563,564.4 622.0 i 360 350 2200 0.01781 0.0'1770 3,350.2 0.0 401.6 33.3 2,038.2 566,947.9 628.5 )

350 340 2200 0.01770 0.01759 3,392.1 0.0 406.6 33.7 2,071.9 570,373.7 635.1 )

340 330 2200 0.01759 0.01754 1,555.9 0.0 186.5 15.5 2,087.4 571,945.1 638.1 )

330 325 310 268 0.01754 0.01754 0.0 0.0 0.0 -0.0 2,087.4 581,481.9 627.6 )

325 300 268 0.01754 0.01744 3,138.6 0.0 376.2 31.2 2 118.5 584,651.7 633.5 f 310 260 268 0.01744 0.01707 11,932.7 0.0 1,430.3 118.6 2,237.1 596,702.9 655.5 i 300 268 0.01707 0.01687 6,668.0 0.0 799.2 66.2 2,303.3 603,437.2 667.3 J 260 235.

210 268 0.01687 0.01669 6,137.9 0.0 735.7 61.0 2,364.3 609,636.0 678.1 I 235 268 0.01669 0.01662 2,422.9 0.0 290.4 24 ~ 1 2,388.4 612,083.0 682.2 i 210 200 I

)TOTAL BAHT VOLIWE 8194.5 gallons I I

I

TABLE 2-13 ST. LUCIE UNIT 1 PLANT COOLDOW FROH 557 F TO 200 F; BAHT AT 3.5 Mt% BORIC ACID; RMT AT 1850 ppn BOROH

)AVG.STS. TEHP. PZR PRESS SPECIFIC VOLUHE SNRIHKAGE BAHT VOL 8 RUT VOL B 8/A ADDED TOTAL 8/A TOTAL STS. HASS FINAL COHC. )

(F) (psis) (cu.f t./Iha) HASS(lhn) 70 F (gal) 50 F (gal) (lha) (lha) (lha) (ppa boron) (

Tl Tf VI Vf"

--It 557 557 2200 1.00000 1.00000 0.0 0.0 0.0 D.O 467,651.2 0.0 )

557 510 2200 0.02157 0.02032 27,319.3 3,280.0 0.0 990.9 990.9 495,961.3 349 3 I 510 489 2200 0.02032 0.01988 10,457.5 1,255.6 0.0 379.3 -1,370.2 506,798.2 472.7 J 489 480 2200 0.01988 0.01970 4,412.7 0.0 528.9 47.2 1,417.3 511,258.1 484.7 i 480 470 2200 0.01970 0.01951 4,746.2 0.0 568.9 50.8 1,468.1 516,055.1 497.4 i 470 460 2200 0.01951 0.01933 4,582.5 0.0 549.3 49.0 1,517.1 520,686.5 509.4 f 460 450 2200 0.01933 0.01916 4,406.9 0.0 528.2 47.1 1,564.3 525,140.6 520.8 I 450 440 2200 0.01916 0.0'1900 4,219.8 0.0 505.8 45.1 1,609.4 529,405.5 531.5 J 440 430 2200 0.01900 0.01885 4,021.1 0.0 482.0 43.0 1,652.4 533,469.6 541.5 I 430 420 2200 0.01885 0.01870 4,085.6 0.0 489.7 43.7 1,696.1 537,598.9 551.6 i 420 410 2200 0.01870 0.01855 4,151.7 0.0 497.6 44.4 1,740.5 541,794.9 561.6' 410 400 2200 0.01855 0.01842 3,652.8 0.0 437.8 39.1 1,779.6 545,486.8 570.4 [

400 390 2200 0.01842 0.01828 3,991.9 0.0 478.5 42.7 1,822.3 549,521.4 579.8 (

390 380 2200 0.01828 0.01816 3,470.6 0.0 416.0 37.1 1,859.4 553,029.1 87.8 I 380 370 2200 0.01816 0.01804 3,516.8 0.0 421.5 37.6 1,897.0 556,583.5 595.9 /

370 360 2200 0.01804 0.01792 3,563.9 0.0 427.2 38.1 1,935.1 560,185.5 603.9 /

360 350 2200 0.01792 0.01781 3,309.1 0.0 396.6 35.4 1,970.5 563,530.0 611.3 I 350 340 2200 0.01781 0.01770 3,350.2 0.0 401.6 35.8 2,006.3 566,9I6.0 618.7 (

340 330 2200 0.01770 0.01759 3,392.1 0.0 406.6 36.3 2,042.6 570,344.4 626.1 )

330 325 2200 0.01759 0.01754 1,555.9 0.0 186.5 16.6 2,059.2 571,917.0 629.5 )

325 310 268 0.01754 0.01662'.00.0 0.01754 0.0 0.0 0 ' 2,059.2 581,453.7 619.2 I 310 300 268 0.01754 0.01744 3,138.6 0.0 376.2 33.6 2,092.8 584,625.9 625.9 )

300 260 268 0.01744 0.01707 11,932.7 0.0 1,430.3 127.6 2,220.4 596,686.2 650.6 I 260 235 268 0.01707 0.01687 6,668.0 0.0 799.2 71.3 2,291.7 603,425.6 664.0 )

235 210 268 0.01687 O.ON69 6, 137.9 0.0 735.7 65.6 2,357.4 609,629.1 676.1 )

210 200 268 0.01669 2,422.9 0.0 290.4 25.9 2,383.3 612,077.9 680.8 /

I iTOTAL BAHT VOLUHE 4535.6 gsllces I I I

I TABI.E 2-14 ST. LUCIE UNIT 'l I PLANT COOLOONN FROH 557 F TO 200 F; BAHT 'AT 3.25 at% BORIC ACID; RMT AT 1850 pxa BORON IAVG.SYS. TEHP. PZR PRESS SPEC FIC VOLLBIE SHRINKAGE BAHT VOL Q RllT VOL Q 8/A ADDED TOTAL B/A T TAL SYS HASS FINAL CONC I (psfa) (cu.ft./tba) HASS(tba) 70 F (gal) 50 F (gat) (tba) (tba)

(tba) . (ppa boron) I Tl Tf Vt Vf I 557 557 2200 1.00000 1.00000 0.0 0.0 0.0 0.0 0.0 467,651.2 0.0 I 557 510 2200 0.02157 0.02032 27,319.3 3,280.0 0.0 917.7 917.7 495,888.2 323.6 I 510 490 2200 0.02032 0.01990 9,972.2 1,197.3 0.0 335.0 1,252.7 506,195.3 432 7 I 490 480 2200 0.01990 0.01970 4,898.1 588.1 0.0 164.5 1,417.2 511,258.0 484.7 I 480 470 2200 0.01970 0.01951 4,746.2 0.0 568.9 50.8 1,468.0 516,054.9 497 3 I 470 460 2200 0.01951 0.01933 4,582.5 0.0 549.3 49.0 1,517.0 520,686.4 509.4 I 460 450 2200 0.01933 0.01916 4,406.9 0.0 528.2 47.1 1,564.1 525,140.5 520.7 I 450 440 2200 0.01916 0.01900 4,219.8 0.0 505.8 45.1 1,609.3 529,405.4 531.5 I 440 430 2200 0.01900 0.01885 4,021.1 0.0 482.0 43.0 1,652.3 533,469.5 541.5 I 430 420 2200 0.01885 0.01870 4,085.6 0.0 489.7 43.7 1,696.0 537,598.8 551.6 I 420 410 2200 0.01870 0.01855 4,151.7 0.0 497.6 44.4 1,740.4 541,794.8 561.6 I 410 400 2200 0.01855 0.01SC2 3,652.8 0.0 437.8 39.1 1,779.5 545,C86.7 570.3 I COD 390 2200 0.01842 0.0182S 3,99l.9. 0.0 478.5 42.7 1,822.1 549,521.3 579.7 I 390 380 2200 0.01828 0.01816 3,470.6 0.0 416.0 37.1 1,859.3 553,029.0 ser.e I 380 370 2200 0.01816 0.01804 3,516.8 0.0 421.5 37.6 1,S96.9 556,583 4 595.8 I 370 360 2200 0.01804 0.01792 3,563.9 0.0 427.2 38.1 1,935.0 560,1&5.4 603.9 I 360 35D 22DD 0.01792 0 01781 3,309.1 0.0 396.6 35.4 1,970.4 563,529.9 611.3 I 350 340 2200 0.01781 0.01770 3,350.2 0.0 401.6 35.8 2,006.2 566,915.9 618.7 I 340 330 2200 0.01770 0.01759 3,392.1 0.0 406.6 36.3 2,0C2.5 570,344.3 626'1 I 330 325 2200 0.01759 ~ 0.01754 1,555.9 0.0 186.5 16.6 2,059.1 571,916.9 629.5 I 325 310 268 0.01754 0.01754 0.0 0.0 O.D 0.0 2,059.1 581,453.6 619.1 I 310 300 268 0.0175C 0.01744 3,138.6 0.0 376.2 33.6 2,092.7 584,625.8 625.e I 300 260 26S 0.01744 0.01707 11,932.7 0.0 1,C30.3 127.6 2,220.3 596,686.1 650.6 I 260 235 268 0.01707 0.01687 6,668.0 0.0 799.2 71.3 2,291.6 603,425.5 664.0 I 235 210 268 0.01687 0.01669 6,137.9 0.0 735.7 65.6 2,357.3 609,629.0 676.0 I 210 200 268 0.01669 0.01662 2,422.9 0.0 290.4 25.9 2,383.2 612,077.8 680.7 I I

ITOTAL BAHT VOLINE 5065.4 gat iona I I I

TABLE 2-15 ST. LUCIE UNIT 1 PLANT COOLDOUN FROH 557 F TO 200 F; BAHT AT 3.0 Mt% BORIC ACID) RUT AT 1850 ge BORON (AVG.SYS. TEHP. PZR PRESS SPECIFIC VOLUHE SHRINKAGE BAH'I VOL 9 RllT VOL Q 8/l ADDED TOTAL B/A TOTAL STS. HASS FINAL CONC.I

( (F) (psia) (cu.f t./Iba) HASS(iba) 70 F (Bal) 50 F (gal) (lbn) . (lba) (Iba) (ppa boron) I Ti Tf Vi Vf I

-I 557 557 2200 1.00000 1.00000 0.0 0.0 0.0 0.0 0.0 C67,651.2 0.0 I 557 510 2200 0.02157 0.02032 27,319.3 3,280.0 0.0 844.9 844.9 495,815.4 297.9 I 510 490 2200 0.02032 0.01990 9,972.2 1,197.3 0.0 308 4 1,153.4 506,096.0 398.4 I 490 CSO 2200 0.01990 0.01970 4,898.1 588.1 0.0 151.5 1,304.8 511,145.6 446.3 (

480 C69 2200 0.01970 0.01949 5,200.6 62C.4 0.0 160.8 1,465.7 516,507.1 496.1 I 469 460 2200 0.01949 0.01933 4,128.0 0.0 494.8 C4.2 1,509.8 520,679.3 507.0 I 460 450 2200 0.01933 0.01916 4,406.9 0.0 528.2 C7.1 1,557.0 525,133.3 518.4 I 450 440 2200 0.01916 0.01900 4,219.8 0.0 505.8 45.1 1,602.1 529,398.2 529.1 I 440 430 2200 0.01900 0.01885 4,021.1 0.0 482.0 43.0 1,6C5.1 533,462.3 539.2 I 430 420 2200 0.01885 0.01870 4,085.6 0.0 489.7 43.7 1,688.8 537,591.6 549.2 I 420 410 2200 0.01870 0.01855 4,151.7 0.0 497.6 44.4 1,733.2 541,787.7 559.3 I 410 400 2200 0.01855 0.01842 3,652.8 0.0 437.8 39.1 1,772.3 545,479.5 568.0 (

400 390 2200 0.01842 0.01828 3,991.9 0.0 478.5 42.7 1,815.0 549,514 ~ 1 577.5 I 390 3SO 2200 0.01828 0.01816 3,470.6 0.0 416.0 37.1 1,852.1 553,021.8 585,5 I 380 370 2200 0.01816 0.01804 3,516.8 0.0 421.5 37.6 1,889.7 556,576.2 593.6 (

370 360 2200 0.0180C 0.01792 3,563.9 0.0 427.2 38.1 1,927.8 560,178.2 601.7 (

360 350 2200 0.01792 0.01781 3,309.1 0.0 396.6 35.C 1,963.2 563,522.7 609.1 (

350 340 2200 0.01781 0.01770 3,350.2 0.0 401.6 35.8 1,999.0 566,908.7 616.5 I 340 330 2200 0.01770 0.01759 3,392.1 0.0 406.6 36.3 2,035.3 570,337.1 623.9 I 330 325 2200 0.01759 0.01754 1,555.9 0.0 186.5 16.6 2,052.0 571,909.7 6273 I 325 310 268 0.01754 0.01754 0.0 0.0 0.0 0.0 2,052.0 581,C46.5 617.0 I 310 300 26S 0.01754 0.01744 3,138.6 0.0 376.2 33.6 2,085.5 584,618.7 623.7 (

300 260 268 0.01744 0.01707 11,932.7 0.0 1,430.3 127.6 2,213.2 596,679.0 648.5 (

260 235 268 0.01707 0.01687 6,668.0 0.0 799.2 71.3 2,284.5 603,418.3 661.9 (

235 210 268 0.01687 0.01669 6,137.9 0.0 735.7 65.6 2,350.1 609,621.8 674.0 I 210 200 268 0.01669 0.01662 2,422.9 0.0 290.4 25.9 2,376.0 612,070.6 678.7 (

I (TOTAL BAIIT VOLNIE 5689.8 gallons I

TABLE 2-16 ST. LUCIE UNIT 1 PLNIT COOLbSN FRQI 557 F TO 200 F; BNlT AT 2.75 Mt% BORIC ACID; RMT AT 1850 ppa BORON TENP. SPEC IF IC VOLISE SHRINKAGE SANT VOL 8 RMT VOL Q B/A NOED TOTAL 8/A TOTAL STS NASS FINAL CONC I I AVG. SYS PZR PRESS (F) (psla) (cu.ft./Iha) HASS(tbm) 70 F (gal) 50 F (gal) (lba) (Ihn) (lha) (ppn boron) (

Tl Tf Vi Vf I

-I 557 557 '2200 1.00000 1.00000 0.0 0.0 0.0 0.0 0.0 467,651.2 0.0 I 557 510 2200 0.02157 0.02032 27,319.3 3,280.0 0.0 772.5 772.5 495,743.0 . 272.4 (

510 490 2200 0.02032 0.01990 9,972.2 1,197.3 0.0 282;0 1,054.5 505,997.1 364A (

490 480 2200 0.01990 0.01970 4,S98.1 588.1 0.0 GS.S 1,193.0 511,033.7 4M.1 480 C70 2200 0.01970 0.01951 4,746.2 569.8 0.0 134.2 1,327.2 515,914.1 4498 I 470 460 2200 0.01951 0.01933 4,582.5 550.2 0.0 129.6 1,456.8 520,626.2 489.2 (

460 452 2200 0.01933 0.01919 3,519.3- 422.5 0.0 99.5 1,556.3 524,245.0 5190 I 452 440 2200 0.01919 0.01900 5,107.4 0.0 612.2 54.6 1,610.9 529,407.0 532.0 I 440 430 2200 0.01900 0.01885 4,021.1 0.0 C82.0 43.0 1,653.9 533,471.1 542.0 (

430 420 2200 0.01885 0.01870 4,085.6 0.0 489.7 43.7 1 697.6 537,600.4 552.1 I 420 410 2200 0.01870 0.01855 4,151.7 0.0 497.6 44.C 1,742.0 541,796.5 562.1 (

410 COO 2200 0.01855 0.01842 3,652.8 0.0 C37.8 39.1 1,781.1 5C5,488.4 570.9 (

400 390 2200 0.01842 0.01828 3,991.9 0.0 C78.5 42.7 1,823.8 549,522.9 580.3 (

390 375 2200 0.01828 0.01810 5,223.2 0.0 626.1 55.9 1,879.7 554,802.0 592.3 (

375 370 2200 0.01810 0.01804 1,764.2 0.0 211.5 18.9 1,898.5 556,585.1 596A (

370 360 2200 0.01804 0.01792 3,563.9 0.0 C27.2 38.1 1,936.6 560,187.1 604.4 (

360 350 2200 0.01792 0.01781 3,309.1 0.0 396.6 35A 1,972.0 563,531.5 611.8 I 350 '340 2200 0.01781 0.01770 3,350.2 0.0 401.6 35.8 2,007.9 566,917.6 6192 I 340 330 2200 0.01770 0.01759 3,392.1 0.0 C06.6 36.3 2,044.1 570,346.0 626.6 (

330 325 2200 0.01759 0.01754 1,555;9 0.0 186.5 16.6 2,060.8 571,918.5 630.0 (

325 310 268 0.01754 0.0175C 0.0 0.0 0.0 0.0 2,060.8 581,455.3 619.6 I 310 300 268 0.01754 0.017C4 3,138.6 0.0 376.2 33.6 2,094.4 584,627.5 626.3 I 300 260 268 0.01744 0.01707 11,932.7 0.0 1,430.3 127.6 2,222.0 596,687.8 651.1 I 260 235 268 0.01707 0.01687 6,668.0 0.0 799.2 71.3 2,293.3 603,427.1 664.4 (

235 210 268 0.01687 0.01669 6,137.9 0.0 735.7 65.6 2,358.9 609,630.7 676.5 I 210 200 268 0.01669 0.01662 2,C22.9, 0.0 290.4 25.9 2,3S4.8 612,079.4 6S1.2 (

I (TOTAL SNIT VOLUNE 6607.9 gallons I I

I

TABLE 2-17 ST. LUClE UNlT 1 PLANT COOLOOMN FRY 557 F TO 200 F; BAHT AT 2.50 Mt% BORlC AClD; Rill AT 1850 ppa BORON lF I C RllT VOL Q 8/A ADOED TOTAL B/A TOTAL SYS. MASS FlNAL CONC.

IAVG SYS'ENP PZR PRESS SPEC VOLUNE SHRINKAGE BANT VOL Q (

(F) (psla) (eu.ft./(ha) HASS(lha) 70 F (gal) 50 F (gal) (Ibn) (ibn) ( Ibm) (ppa boron) I Tf Vl Vf I 557 557 2200 1.00000 1.00000 0.0 0.0 0.0 0.0 0.0 467,651.2 0.0 I 510 2200 0.02157 0.02032 27,319.3 3,280.0 0.0 7IO.S 700.5 495,671.0 247.1 I 557 510 490 2200 0.02032 0.01990 .9,972.2 1,197.3 0.0 255.7 956.2 505,898.8 330.4 I C90 480 2200 0.01990 0.01970 4,898.1 588.1 0.0 125.6 1,081.8 510,922.5 370.2 I 480 470 2200 0.01970 0.01951 4,746.2 569;8 0.0 121.7 1,203.5 515,790.4 407.9 I 470 460 2200 0.01951 0.01933 4,582.5 550.2 0.0 117.5 1,321.0 520,490.4 443.7 I 2200 0.01933 0.01916 4,406.9 529.1 0.0 113.0 1,C34.0 525,010.3 477.5 I C60 450 2200 0.01916 0.01900 4,219.8 506.6 0.0 108.2 1,542.1 529,338.3 509.4 I 450 440 430 2200 T).01900 0.01885 4,021.1 482.8 0.0 103.1 1,645.3 533,C62.5 539.2 I 440 420 2200 0.01885 0.01870 4,0S5.6" 0.0 489.7 43.7 1,688.9 537,591.7 549.3 I 430 410 2200 0.01870 0.01855 4,151.7 0.0 497.6 44.C 1,733.3 541,787.8 559.3 I 420 2200 0.01855 0.01S42 3,652.8 0.0 437.8 39.1 1,772.4 5C5,C79.7 568.1 I 410 COO 390 2200 0.01842 0.01828 3,991.9 0.0 478.5 42.7 1, 815.1 549,514.3 577.5 I 400 380 2200 0.01828 0.01816 3,470.6 0.0 416.0 37.1 1,852.2 553,022.0 585.6 I 390 370 2200 0.01816 0.01804 3,516.8 0.0 421.5 37.6 1,889.8 556,576.4 593.6 I 380 370 360 2200 0.01804 0.01792 3,563.9 0.0 427.2 38.1 1,928.0 560,178.4 601.7 I 350 2200 0.01792 0.01781 3,309.1 0.0 396.6 35.4 1,963.4 563,522.8 609.1 I 360 2200 0.01781 0.01770 3,350.2 0.0 401.6 35.8 1,999.2 566,908.9 616.5 I 350 340 330 2200 0.01770 0.01759 3,392.1 0.0 406.6 36.3 2,035.5 570,337.3 624.0 I 340 325 2200 0.01759 0.0175C 1,555.9 0.0 186.5 16.6 2,052.1 571,909.9 627.3 I 330 310 268 0.0175C 0.01754 0.0 0.0 0.0 0.0 2,052.1 581,C46.6 617.0 I 325 310 300 268 0.01754 0.01744 3,138.6 0,0 376.2 33.6 2,085.7 584,618.8 623.7 I 260 268 0.01744 0.01707 11,932.7 0.0 1,430.3 127.6 2,213.3 596,679.1 648.5 I 300 260 235 268 0.01707 0.01687 6,668.0 0.0 799.2 71.3 2,284.6 603,418.5 661.9 I 210 268 0.01687 0.01669 6,137.9 0.0 735.7 65.6 2,350.3 609,622.0 674.0 I 235 210 200 268 0.01669 0.01662 2,422.9 0.0 290.4 25.9 2,376.2 612,070.7 678.7 I I

ITOTAL SNIT VOLINE 7703.9 gallons I I

I

TABLE 2-18 ST. LUCIE UNIT 1 PLANT COOLDNIN FRNI 557 F TO 200 F; BAHt AT 3.5 MtX BORIC ACID; Rllt AT 2000 ppa BORON

)AVG.STS. TEHP. PZR PRESS SPECIFIC VOLWE SHRINKAGE BAHt VOL Q RMT VOL Q B/A ADDED TOTAL B/A TOTAL STS ~ HASS FINAL CNC I

( (F) (pe la) (cu. ft./lha) HASS(lha) 70 F (gal) 50 F (gal) (lha) (lha) (lha) (ppa boron) )

Ti Tf VI Vf I

557 557 2200 1.00000 1.00000 0.0 0.0 0.0 0.0 0.0 467,651.2 0.0 (

557 510 2200 0.02157 0.02032 27,319.3 3,280.0 0.0 990.9 990.9 495,961.3 3493 I 510 496 2200 0.02032 0.02002 7,080.3 850.1 0.0 256.8 1,247.7 503,298A 433.4 )

496 480 2200 0.02002 0.01970 7,790.0 0.0 933.7 90.1 1,337.8 511,178.5 Cs?.6 )

480 470 2200 0.01970 0.01951 4,746.2 0.0 568.9 54.9 1,392.7 515,979.7 471.9 I 470 C60 2200 0.01951 0.01933 4,582.5 0.0 549.3 53.0 1,C45.7 520,615.2 485.5 I 460 450 2200 0.01933 0.01916 C,C06.9 0.0 528.2 51.0 1,496.7 525,073.1 498.4 )

450 440 2200 0.01916 0.01900 4,219.8 0.0 505.8 CB.B 1,5C5.6 529,341.7 510.5 I 440 C30 2200 0.01900 0.01885 4,021.1 0.0 482.0 46.5 1,592.1 533,C09.3 521.8 I 430 420 2200 0.01885 0.01870 4,085.6 0.0 489.7 C7.3 1,639 4 53?,542.2 533.2. I 420 C10 2200 0.01870 0.01855 4,151.7 0.0 497.6 48.0 1,687.4 541,741.9 544.6 (

410 400 2200 0.01855 0.01842 3,652.S 0.0 43?.8 42.3 1,729.7 545,C36.9 554.4 I 400 390 2200 0.01842 0.01828 3,991.9 0.0 478.5 46.2 1,7?5.9 549,C?5.0 565.1 I 390 380 2200 0.01828 0.01816 3,470.6 0.0 416.0 40.2 1,816.0 552,985.8 574.2 I 380 370 2200 0.01816 0.01M4 3,516.8 0.0 421 ~ 5 40.7 1,856.7 556,543.3 583.3 )

370 360 2200 0.01804 0.01792 3,563.9 0.0 427.2 41.2 1,898.0 592.4 I 560,148.4'63,495.8 360 350 2200 0.01792 0.017S1 3,309.1 0.0 396.6 38.3 1,936.3 600.8 I 350 340 2200 0.01781 0.01770 3,350.2 0.0 401.6 38.8 1,975.0 566,884.7 609.1 I 340 330 2200 0.01770 0.0)759 3,392.1 0.0 C06.6 39.3 2,014.3 570,316.1 617.5 I 330 325 2200 0.01759 0.01?54 1,555.9 0.0 186.5 18.0 2,032.3 571,890.0 621.3 I 325 310 268 0.01754 0.0175C 0.0 0.0 0.0 0.0 2,032.3 5S1,426.8 611 ~1 I 310 300 268 0.0175C 0.01744 3,138.6 0.0 376.2 36.3 2,068.6 584,601.7 618.6 I 300 260 268 0.01744 0.01707 11,932.7 0.0 1,430.3 138.1 2,206.7 596,672.5 646.6 (

260 235 268 0.01707 0.01687 6,668.0 0.0 799.2 77.2 2,283.8 603,417.7 661.? )

235 210 268 0.01687 0.01669 6,137.9 0.0- 735.7 71.0 2,354.9 609,626.6 675.3 I 210 200 268 0.01669 0.01662 2,422.9 0.0 290.4 28.0 2,382.9 612,077.5 680.7 (

)TOTAL BAHT VOLWE 4130.1 gallons I

I TABLE 2-19 ST. LUCIE UNIT 1 PLANT COOLDSIN FROH 557 F TO 200 F; BAHT AT 3.25 at% BORIC ACID; RNT AT 2000 ppn BORON IAVG.STS. TEHP. PZR PRESS SPECIFIC VOLUHE SHRINKAGE BAHT VOL Q RllT VOL Q 8/A ADDED TOTAL B/A TOTAL STS HASS FINAL CONC I I (F) (psia) (cu.ft./Ibn) HASS(lbn) 70 F (gal) 50 F (gal) (lbn) (lbn) (lbn) (ppn boron) I I Ti Tf Vl Vf I I I 557 557 2200 1.00000 1.00000 0.0 0.0 0.0 0.0 0.0 467,651.2 0.0 I 557 510 2200 0.02157 0.02032 27,319.3 3,2M.O 0.0 917.7 917.7 495,888.2 323 6 I 510 488 2200 0.02032 0.01986 10,943.9 1,313.9 0.0 367.6 1,285.3 507,199.7 443.1 I 488 480 2200 0.01986 0.01970 3,926 4 0.0 470.6 45.4 'I,330.8 511,171.5 455.2 I 480 470 2200 0.01970 0.01951 4,746.2 0.0 568.9 54.9 1,385.7 515,972.6 469.5 I 470 460 2200 0.01951 0.01933 4,582.5 0.0 5C9.3 53.0 1,438.7 520,608.1 483.2 I 460 450 2200 0.01933 0.01916 4,406.9 0.0 528.2 51.0 1,489.7 525,066.1 496.0 I 450 440 2200 0.01916 0.01900 4,219.8 0.0 505.8 48.8 1,538.5 529,334.7 508.2 I 440 430 2200 0.01900 0.01885 4,021.1 0.0 482.0 46.5 1,585.1 533,C02.3 519.5 I 430 420 2200 0.01885 0.01870 C,085.6 0.0 489.7 C7.3 1,632.C 537,535.1 530.9 I 420 410 2200 0.018?0 0.01855 4,151.7 0.0 497.6 48.0 1,680.4 541,734.8 542 3 I C10 400 2200 0.01855 0.01842 3,652.8 0.0 437.8 42.3 1,?22.7 5CS,C29.9 552.2 (

400 390 2200 0.01842 0.01828 3,991.9 0.0 478.5 46.2 1,768.9 549,468.0 562.8 I 390 380 2200 0.0182S 0.01816 3,C?0.6 0.0 416.0 40.2 I,M9.0 552,978.8 572.0 I 380 370 2200 0.01816 0.01804 3,516.S 0.0 421.5 40.7 1,849.7 556,536.2 581.1 I 370 360 2200 0.01804 0.01792 3,563.9 0.0 427.2 41.2 1,890.9 560,1C1.C 590.2 I 360 350 2200 0.01792 0.01781 3,309.1 0.0 396.6 38.3 1,929.2 563,488.7 598.6 I 350 340 2200 0.01?S1 0.01770 3,350.2 0.0 401.6 38.8 1,968.0 566,877.7- 607.0 I 340 330 2200 0.01770 0.01?59 3,392.1 0.0 406.6 39.3 2,007.3 570,309.1 615.3 I 330 325 2200 0.01759. 0.0175C 1,555.9 0.0 186.5 18.0 2,025.3 571,883.0 619.2 I 325 310 268 0.01754 0.01754 0.0 0.0 0.0 0.0 2,025.3 581,419.8 609.0 I 268 0.01754 0.01744 3,138.6 0.0 376.2 36.3 2,061.6 584,594.7 6'16.6 I 310 300 300 260 268 0.01744 0.01707 11,932.7 0.0 1,430.3 138.1 2,199.7 596,665.5 644.5 I 260 235 268 0.01707 0.01687 6,668.0 0.0 799.2 7?.2 2,276.8 603,410.7 659.7 I 235 210 268 0.01687 0.01669 6,137.9 0.0 735.7 71.0 2,347.8 609,619.6 6?3.3 I 210 200 268 0.01669 0.01662 2,422.9 0.0 290.4 28.0 2,375.9 612,0?O.C 678.7 I I

ITOTAL BAHT VOLUHE 4594.0 gallons I I

I

TABLE 2-20 ST LUCIE VHIT 1 PLNIT COOLDOHH FRC$ 1 557 F TO 200 F; BAIIT AT 3.0 Mt% BORIC ACID; RHT AT 2000 ppa BOROH

)AVG.SYS. TENP. PZR PRESS SPECIFIC VOLINE SHRIKKAGE BAHT VOL 8 RHT VOL Q 8/A ADDED TOTAL 8/A TOTAL STS HASS FIHAL COHC' I (F) (paia) (cu. ft./Iba) HASS(lba) 70 F (Bal) 50 F (gal) (Iba) (Ibn) (lba) (ppa boron) t Ti Tf Vi Vf I

-I 557 557 2200 1.00000 1.00000 0.0 0.0 0.0 0.0 0.0 467,651.2 0.0 )

557 510 2200 0.02157 0.02032 27,319.3 3,280.0 0.0 844.9 SC4.9 495,815A 297.9 )

510 490 2200 0.02032 0.01990 9,972.2 1,197.3 0.0 308.4 1,153A 506,096.0 398.4 )

490 477 2200 0.01990 0.01964 6,3$ 2.3 757.9 O.D 195.2 1,348.6 512,603.5 460.0 t 477 470 2200 0.01964 0.01951 3,332.0 0.0 399.4 38.6 1,387.1 515,974.1 470.0 )

470 460 22DD D.D1951 0.01933 4,582.5 0.0 549.3 53.0 1,440.2 520,609.6 483.6 )

460 450 2200 0.01933 0.01916 4,406.9 0.0 528.2 51.0 1,C91.2 525,067.5 496.5 )

450 440 2200 0.01916 0.01900 4,219.8 0.0 505.8 48.8 1,540.0 529,336.1 508.6 )

CCO 430 2200 0.01900 0.01885 4,021.1 0.0 482.0 46.5 1,586.5 533,C03.7 520.0 i 430 420 2200 0.01885 0.01S70 4,085.6 0.0 489.7 47.3 1,633.8 537,536.6 531.4 .I 420 410 2200 0.01870 0.01855 4,151.'7 0.0 497.6 CB.D 1,681.8 541,736.3 542.8 I 410 400 2200 0.01855 0.01S42 3,652.8 0.0 437.8 42.3 1,724.1 545,431A 552.6 I 400 390 2200 0.01842 0.01828 3,991.9 0.0 478.5 C6.2 1,770.3 549,469.C 563.3 f 390 3SO 2200 0.01828 0.01816 3,470.6 0.0 416.0 40.2 1,810.5 552,980.2 572.4 )

380 370 2200 0.01816 0.01804 3,5'$6.S 0.0 421.5 40.7 1,851.1 556,537.7 581.5 J 370 360 2200 0.01804 0.01792 3,563.9 0.0 427.2 41.2 1,892A 560,142.8 590.7 i 360 350 2200 0.01792 0.01781 3,309.1 0.0 396.6 38.3 1,930.7 563,490.2 599.0 I 350 340 2200 0.01781 0.01770 3,350.2 0.0 401.6 38.8 1,969A 566,879.1 607.4 )

340 33D 2200 0.01770 0.01759 3,392.1 0.0 406.6 39.3 2,008.7 570,310.5 615.8 (

330 325 2200 0.01759 ~ 0.01754 1,555.9 0.0 186.5 18.0 2,026.7 57$ ,884 A 619.6 )

325 310 268 0.01754 0.01754 0.0 0.0 0.0 0.0 2,026.7 581,C21.2 609.4 i 310 300 26S 0.0175C 0.01744 3,13S.6 0.0 376.2 36.3 ~ 2,063.0 584,596.1 617.0 i 300 260 268 0.01744 0.01707 11,932.7 0.0 1,430.3 138.1 2,201.1 596,666.9 645.0 )

260 235 268 0.01707 0.01687 6,668.0 0.0 799.2 77.2 2,278.3 603,C12.1 660.1 (

235 210 268 0.01687 0.01669 6,137.9 0.0 735.7 71.0 2,349.3 609,621.0 673.8 )

2$ 0 200 26S 0.01669 0.01662 2,422.9 0.0 290.4 28.0 2,377.3 612,071.9 679.1 I

jTOTAL BAHT VOLQIE 5235.2 gallons I I I

I TABLE 2-21 ST. LUCIE UNIT 1 I PLANT COOLDONI FROH 557 F TO 200 F; BAHT AT 2.75tX BORIC ACID; RN AT 2000 P}a} BORON I IAVG'STS TEHP PZR PRESS SPECIFIC VOLINE SNRIN}(AGE BAHT VOL Q RNT VOL Q 8/A N}DED TOTAL B/A TOTAL STS. HASS FINAL CNC.) (F) (psla) (cu. ft./lbn) HASS(lbn) 70 F (gal) 50 f (gal) (Ib}) (lbn) (lbn) (ppn boron) ] I TI Tf VI Vf I I- -I 557 557 2200 1.00000 1.00000 0.0 0.0 0.0 0.0 0.0 467,651.2 0.0 ) 557 510 2200 0.02157 0.02032 27,319.3 3,280.0 0.0 7l2.5 772.5 495,743.0 272.4 J 510 490 2200 0.02032 0.01990 9,972.2 1,197.3 0.0 252.0 1,054.5 505,997.1 364.4 ) I 490 480 2200 0.01990 0.01970 4,898.1 588 ~ I 0.0 138.5 1,193.0 511,033.7 408.1 ) 480 470 2200 0.01970 0.01951 C,746.2 569.8 0.0 134.2 1,327.2 515,914.1 449.8 I 470 461 2200 0.01951 0.01935 4,120.4 494.7 0.0 116.5 1,4C3.7 520,151.0 485.3 I 461 450 2200 0.01935 0.01916 4,869.0 0.0 583.6 56.3 1,500.1 525,076 4 499.5 ( 450 440 2200 0.01916 0.01900 4,219.8 0.0 505.8 48.8 1,548.9 529,345.0 511.6 I 440 430 2200 0.01900 0.01885 4,021.1 0.0 482.0 46.5 1,595.4 533,412.6 522.9 ) 430 420 22M 0.01885 0.01870 4,085.6 0.0 489.7 47.3 1,642.7 537,545.5 534.3 f 420 410 2200 0.01870 0.01855 4,151.7 0.0 497.6 48.0 1,690.7 5C1,745.2 545.6 I 410 400 2200 0.01855 0.01842 3,652.8 0.0 437.8 42.3 1,733.0 545,440.3 555.5 ) COO 390 2200 0.01842 0.01828 3,991.9 0.0 C78.5 46.2 1,779.2 549,478.3 566 1 I 390 380 2200 0.01828 0.01816 3,470.6 0.0 416.0 40.2 1,819 4 552,989.1 575.2 ( 380 -370 2200 0.01816 0.01804 3,516.8 0.0 421.5 40.7 1,860.0 556,546.6 584.3 ) 370 360 2200 0.01804 0.01792 3,563.9 0.0 427.2 41.2 1,901.3 560,151.7 593.4 ) 360 350 2200 0.01792 0.01781 3,309.1 0.0 396.6 38.3 1,939.6 563,499.1 601.8 ( 350 3CO 2200 0.01781 0.01770 3,350.2 0.0 401.6 38.8 1,978.3 566,888.1 610.1 I 340 330 2200 0.01770 0.01759 3,392.1 0.0 406.6 39.3 2,017.6 570,319.4 618.5 ) 330 325 2200 0.01759 0.01754 1,555.9 0.0 186.5 18.0 2,035.6 571,893.4 6223 I 325 310 268 0.01754 0.01754 0.0 0.0 0.0 0.0 2,035.6 581,430.1 612.1 I 310 300 268 0.0175C 0.0174C 3,138.6 0.0 376.2 36.3 2,071.9 584,605.0 619.6 I 300 260 268 0.01744 0.01707 11,932.7 0.0 1,430.3 138.1 2,210.0 596,675.8 647.6 i 260 235 268 0.01707 0.01687 6,668.0 0.0 799.2 77.2 2,287.2 603,421.0 662.7 ) 235 210 268 0.01687 0.01669 6,137.9 0.0 735.7 71.0 2,358.2 609,629.9 676.3 I 210 2M. 268 0.01669 0.01662 2,422.9 0.0 290.4 28.0 2,386.2 612,080.8 681.6 ) I [TOTAL BAHT VOLIWE 6129.9 gallons I I I

TABLE 2-22 ST. LUCIE UNIT 1 PLANT COOLDMI FRNI 557 F TO 200 F; BAIlT AT 2.50 sttX BORIC ACID; RllT AT 2000 ppa BORON IAVQ.SZS. TEHP. PZR PRESS SPECI F I C VOLINIE SHRINKAGE BAIIT VOL Q RUT VOL Q 8/A ADDED TOTAL 8/A TOTAL STS. NABS FINAL CONC I I (F) (pa(a) (cu. ft./Iha) NASS(lba) 70 F (Bal) 50 F (gal) (Ibm) (Iba) (Iha) (ppa boron) I Ti Tf Vl Vf I 557 557 2200 1.00000 1.00000 0.0 0.0 0.0 0.0 0.0 467,651.2 0.0 I 557 510 2200 0.02157 0.02032 27,319.3 3,280.0 0.0 700.5 700.5 495,671.0 247.1 ( 510 490 2200 0.02032 0.01990 9,9?2.2 1,197.3 0.0 255.7 956.2 505,898.8 330A I 490 480 2200 0.01990 0.01970 4,898.1 588.1 0.0 125.6 1,0S1.8 510,922.5 3702 I 480 C?D 2200 0.01970 0.01951 4,746.2 569.8 0.0 121.7 1,203.5 515,?90.C 40?.9 I 470 C60 2200 0.0195'I 0.01933 4,582.5 550.2 0.0 117.5 1,321.0 52D,C90.4 443.7 I 460 450 2200 0.01933 0.01916 4,406.9 529.1 0.0 113.0 1,434.0 525,010.3 47?.5 I 450 440 2200 0.019I6 0.01900 4,219.8 506.6 0.0 108.2 1,542.1 529,338.3 509.4 I 440 430 2200 0.01900 0.018SS 4,021.1 0.0 482.0 46.5 1,588.7 533,405.9 520.7 ( 43D 420 2200 0.01885 0.01870 4,085.6 0.0 489.7 47.3 1,636.0 537,53S.7 532.1 I . 420 410 2200 0.01870 0.01855 4,151.7 0.0 497.6 48.0 1,684.0 541,738.4 543.5 ( 410 400 2200 0.0'I855 0.01S42 3,652.8 0.0 437.8 42.3 1,726.3 545,433.5 553.3 I 400 390 2200 D.01S42 0.01828 3,991.9 0.0 478.5 C6.2 1,7?2.5 549,C?1.6 564.0 ( 390 380 2200 0.01828 0.01816 3,470.6 0.0 416.0 40.2 1,812.6 552,982.4 573 1 I 380 370 2200 0.01816 0.01804 3,516.8 0.0 421.5 40.7 1,853.3 556,539.8 582.2 ( 370 360 2200 D.01804 0.01792 3,563.9 0.0 427.2 41.2 1,894.5 560,145.0 591.3 I 360 350 2200 0.01792 0.01?81 3,309.1 0.0 396.6 38.3 1,932.8 563,492.3 599.7 ( 350 336 2200 0.01781 0.01766 4,702.0 0.0 563.6 54A 1,98?.2 568,248.7 611.4 I 336 330 2200 0.01766 0.01759 2,040.3 0.0 244.6 23.6 2,010.9 570,312.7 616.4 I 330 325 2200 0.01?59 0.01?54 1,555.9 0.0 186.5 18.0 2,028.9 571,886.6 620.3 I 325 310 268 0.01754 0.01?54 0.0 0.0 0.0 0.0 2,028.9 581,423.4 6'I0.1 I 310 300 268 0.01754 0.01744 3,138.6 0.0 376.2 36.3 2,065.2 584,598.3 617.6 I 300 260 268 0.01744 0.01707 11,932.7 0.0 1,430.3 138.1 2,203.3 596,669.1 645.6 I 260 235 26S 0.01707 0.01687 6,668.0 0.0 ?99.2 ?7.2 2,280.4 603,414.3 660.7 ( 235 210 268 0.0'1687 0.01669 6,137.9 0.0 ?35.7 ?I.D 2,351.4 609,623.2 674.4 I 210 200 268 0.01669 0.01662 2,C22.9 0.0 29DA 28.0 2,379.5 612,074.0 679.7 ( I (TOTAL BANT VOLTE 7221.1 gal(ons I I I

TABLE 2-23 ST. LUCIE UNIT 1 I PlANT COOLDONI FROM 557 F TO 200 F; BAHt AT 3.5 vtX BORIC ACID; RUT At 2150 jpn BORON I IAVG.SYS. TEMP. PZR PRESS SPECIFIC VOLUME SHRINKAGE BAHT VOL 0 RIIT VOL 0 B/I ADDED TOTAL 8/A TOTAL SYS. MASS FINAL CONC. ) (F) (pnja) (cu.ft./Ibn) HASS(lbn) 70 F (gal) 50 F (gal) (lbn) (ibm) (lbn) (ppn boron) ) ( Tj Tf Vj Vf I I 557 557 2200 1.00000 1.00000 0.0 0.0 0.0 0.0 0.0 467,651.2 0.0 ) 510 2200 0.02157 0.02032 27,319.3 3,280.0 0.0 990.9 990.9 495,961.3 349.3 557 J 510 503 2200 0.02032 0.02017 3,608.2 433.2 0.0 130.9 1,121.7 C99,700.4 392.5 ( 503 480 2200 0.02017 0.01970 11,262.0 0.0 1,349.9 140.3 1,262.1 511,102.8 431.7 I 470 2200 0.01970 0.01951 4,746.2 0.0 568.9 59.1 1,321.2 515,908.2 4C7.7 ) 480 460 2200 0.01951 0.01933 4,582.5 0.0 549.3 57.1 1,378.3 520,547.7 462.9 ) 470 C50 2200 0.01933 0.01916 C,406.9 0.0 528.2 5C.9 1,433.2 525,009.6 477 3 I 460 440 2200 0.01916 0.01900'.01885 4,219.8 0.0 505.8 52.6 1,485.8 529,282.0 490.8 ) 450 440 430 2200 0.01900 4,021.1 0.0 482.0 50.1 1,535.9 533,353.1 503.5 ) 2200 0.01885 0.01870 4,085.6 0.0 489.7 50.9 1,586.9 537,489.7 516 2.I 430 420 2200 0.01870 0.01855 4,151.7 0.0 497.6 51.7 1,638.6 541,693.1 528 9 I 420 410 2200 0.01855 0.018C2 3,652.8 0.0 437.8 C5.5 1,684.1 545,391 4 539.9 f 410 COO 390 2200 0.01842 0 ~ 01828 3,991.9 0.0 C78.5 49.7 1,733.9 SC9,433.0 551.7 i COO 380 2200 0.01828 0.01816 3,470.6 0.0 416.0 43.3 1,777.1 552,946.9 561.9 I 390 370 2200 0.01816 0.01804 3,516.8 0.0 421.5 43.8 1,820.9 556,507.5 572.1 I 380 360 2200 0.01804 0.01792 3,563.9 0.0 427.2 44.C 1,865.4 560,115.8 582.3 J 370 360 350 2200 0.01792 0.01781 3,309.1 0.0 396.6 41.2 1,906.6 563,466.1 5916 I 340 2200 0.01781 0.01770 3,350.2 0.0 401.6 41.8 1,948.3 566,858.1 600.9 [ 350 340 330 2200 0.01770 0.01759 3,392.1 0.0 406.6 42.3 1,990.6 570,292.4 610.3 I 325 2200 0.01759 0.0175C 1,555.9 0.0 186.5 19.4 2,010.0 571,867.8 614.5 I 330 310 268 0.01754 0.01754 0.0 0.0 0.0 0.0 2,010.0 581,404.5 604.4 ) 325 300 268 0.01754 0.01744 3,138.6 0.0 376.2 39.1 2,049.1 584,582.3 612.8 I 310 260 268 0.01744 0.01707 11,932.7 0 ' 1,C30.3 148.7 2,197.8 596,663.6 644.0 ) 300 268 0.01707 0.01687 6,668.0 0.0 799.2 83.1 2,280.9 603,414.8 660.9 ) 260 235 210 268 0.01687 0.01669 6,137.9 0.0 735.7 76.5 2,357.4 609,629.1 676.1 i 235 200 268 0.01669 0.01662 2,422.9 0.0 290.C 30.2 2,387.6 612,082.2 682.0 j 210 I ITOTAL BAIIT VOLUME 3713.2 gallons I I I

TABLE 2-24 ST. LUClE UMlT 1 PLANT COOLDONI FROH 557 F TO 200 F; BAHT AT 3.25 Mt% BORlC ACID; RMT AT 2150 ppa BORON (AVG-STS. TEHP. PZR PRESS SPEClF IC VOLUHE SHR 1NKAGE BAHT VOL Q RMT VOL Q . 8/A ADDED TOTAL B/A TOTAL STS. HASS FlNAL CONC.( (F) (pa(a) (cu.f t./lba) HASS(lba) 70 F (gal) 50 F (gal) (lha) (lbn) (lba) (ppa boron) ( Ti Tf Vl Vf I 557 557 2200 1.00000 1.00000 0.0 0.0 0.0 0.0 0.0 467,651,2 0.0 ( 557 510 2200 0.02157 0.02032 27,319.3 3,280.0 0.0 917.7 917.7 495,888.2 323.6 ( 510 496 220D D.D2032 D.D2002 7,080.3 850.1 0.0 237.8 1,155.6 503,206.3 C01.5 I 496 480 2200 0.02002 0.01970 7,790.0 0.0 933.7 97.1 1,252.6 511,093.4 428.5 I 480 470 2200 0.01970 0.01951 4,746.2 0.0 568.9 59.1 1,311.8 51s,e98.7 444.6 ( 470 460 2200 0.01951 0.01933 4,582.5 0.0 549.3 57.1 1,368.9 520,538.3 459.8 f 460 450 2200 0.01933 0.01916 4,406.9 0.0 528.2 54.9 1,423.8 525,000.2 474.2 ( 450 440 2200 0.01916 0.0'1900 4,219.8 0.0 505.8 52.6 1,476.4 529,272.5 487.7 ( 440 430 2200 0.01900 0.01885 4,021.1 0.0 482.0 50.1 1,526.5 533,343.'7 500.4 ( 430 420 2200 0.01885 0.01870 4,085.6 0.0 489.7 50.9 1,577.4 537,480.2 513.1 ( 420 410 2200 0.01870 0.01855 4,151.7 0.0 497.6 51.7 1,629.2 5C'1,683.6 525.8 I C10 400 2200 0.01855 0.01842 3,652.8 0.0 437.8 45.5 1,674.7 5C5,3S1.9 536.9 ( 400 390 2200 0.01842 0.01828 3,991.9 0.0 478.5 C9.7 1,724A 5C9,423.6 548.7 ( 390 380 2200 0.01828 0.01816 3,470.6 0.0 416.0 43.3 1,767.7 552,937A 558.9 I 380 370 2200 0.01816 0.01804 3,516.8 0.0 421 ~ 5 43.8 1,S11.5 556,498.0 569.1 I 370 360 2200 0.0180C 0.01792 3,563.9 0.0 427.2 44A 1,855.9 560,106.3 579.3 ( 360 350 2200 0.01792 0.01781 3,309.1 0.0 396.6 41.2 1,897.2 563,456.7 588.7 ( 350 340 2200 0.01781 0.01770 3,350.2 0.0 401.6 41.8 1,938.9 566,848.6 598.0 ( 340 330 2200 0.01770 0.01759 3,392.'1 0.0 406.6 42.3 1,9S1.2 570,283.0 607.4 ( 330 325 2200 0.01759 0.01754 1,555.9 0.0 186.5 19.4 2,000.6 571,858.3 611.6 ( 325 310 2&8 0.01754 0.01754 0.0 0.0 0.0 0.0 2,000.6 581,395.1 601 6 I 310 300 268 0.0175C 0.01744 3,138.6 0.0 376.2 39.1 2,039.7 584,572.8 610.0 I 300 260 268 0.0174C 0.01707 11,932.7 0.0 1,430.3 148.7 2,188A 596,654.2 6C1.2 ( 260 235 268 0.01707- 0.01687 6,668.0 0.0 799.2 83.1 2,271.5 603,405.3 =

                                                                                                                                               &58.2  (

235 21D 268 0.01687 0.01669 6,137.9 0.0 735.7 76.5 2,348.0 609,619.7 673.4 ( 210 200 268 0.01669 0.01662 2,422.9 0.0 290.C 30.2 2,378.2 612,072.7 679.3 ( (TOTAL BAHT VOLUHE 4130.1 gallons I

TABLE 2-25 ST. LUCIE UNIT 1 PLANT COOLOONN FROI 557 F TO 200 F; BAHT AT 3.0 st% BORIC AClD; RMT AT 2150 ga BORON PZR PRESS SPEClF IC VOLINIE SKR lNKAGE BAIIT VOL Q RUT VOL Q B/A ADOEO TOtAL B/A TOtAL STS HASS FlNAL CONC.I )AVG.STS. TEHP (psfa) (cu. ft./Ibm) HASS( lba) 70 F (gal) 50 F (gal) (Ite) (Iha) (ltd) (ppa boron) J Ti Tf VI Vf I I- -I 557 557 2200 1.00000 1.00000 0.0 0.0 0.0 0.0 0.0 467,651.2 0.0 ) 557 510 2200 0.02157 0.02032 27,319.3 3,280.0 0.0 844.9 844.9 495,815 4 297.9 ) 510 490 2200 0.02032 0.01990 9,972.2 1,197.3 0.0 308.4 1,153.4 506,096.0 398.C ) 490 C85 2200 0.01990 0.01980 2,436.7 292.6 0.0 75.4 1,228.7 508,608.0 422.4 i C85 470 2200 0.01980 0.01951 7,207.6 0.0 863.9 89.8 1,318.5 515,905.5 446.8 J 470 460 2200 0.01951 0.01933 4,582.5 0.0 549.3 57.1 1,375.6 520,545.1 462.0 ) 460 450 2200 0.01933 0.01916 4,C06.9 0.0 528.2 54.9 1,C30.6 525,006.9 476.4 ) 450 440 2200 0.01916 0.01900 4,219.8 0.0 505.8 52.6 1,483.1 529,279.3 489.9 [ 440 430 2200 0.01900 0.01885 4,021.1 0.0 482.0 50.1 1,533.3 533,350.5 502.6 f 430 C20 2200 0.01885 0.01870 4,085.6 0.0 489.7 50.9 1,584.2 537,487.0 515.3. I 420 410 2200 0.01870 0.01855 4,151.7 0~0 497.6 .51.7 1,635.9 5C1,690 4 528.0 I 410 COO 2200 0.01855 0.01842 3,652.8 0.0 437.8 45.5 1,681 4 5C5,388.7 539.0 ) 400 390 2200 0.01842 0.01828 3,991.9 0.0 478.5 49.7 1,731.2 549,430.3 550.9 / 390 380 2200 0.01828 0.01816 3,470.6 0.0 416.0 43.3 1,774.4 552,944.2 561.1 I 380 370 2200 0.01816 0.01804 3,516.8 0.0 421.5 43.8 1,818.3 556,504.8 571.2 I 370 360 2200 0.01804 0.01792 3,563.9 0.0 427.2 C4.4 1,862.7 560,113.1 581 4 ( 360 350 2200 0.01792 0.01781 3,309.1 0.0 396.6 41.2 1,903.9 563,463.C 590.8 ) 350 340 2200 0.01781 0.01770 3,350.2 0.0 401;6 41.8 1,945.7 566,855.4 600.1 ) 340 330 2200 0.01770 0.01759 3,392.1 0.0 406.6 42.3 1,987.9 570,289.7 609.4 ) 330 325 2200 0.01759 0.01754 1,555.9 0.0 15$ .5 19.4 2,007.3 571,865.1 613.7 I 325 310 268 0.0175C 0.01754 0.0 0.0 0.0 0.0 2,007.3 581,401.8 603.6 i 310 300 268 0.01754 0.01744 3,138.6 0.0 376.2 39.1 2,046.4 584,579.6 612.0 I 300 260 '68 0.01744 0.01707 11,932.7 0.0 1,430.3 148.7 2,195.1 596,661.0 643.2 / 260 235 268 0.01707 0.01687 6,668.0 0.0 799.2 83.1 2,278.2 603,412.1 660.1 [ 235 210 268 0.01687 0.01669 6,137.9 0.0 '35.7 76.5 2,354.7 609,626.C 675.3 i 210 200 268 0.01669 0.01662 2,422.9 0.0 290.C 30.2 2,384.9 612,079.5 681.2 [ I

)tOTAL BAHT VOLUHE      4769.9 gallons                                                                                                              I I

I

TABLE 2-26 ST. LUCIE UNIT 1 PLANT COOLDShl FRON 557 F TO 200 FT BAIIT AT 2.75 QtX BORIC ACID; RNT AT 2150 ga BORON (AVG.STS. TENP. PZR PRESS SPECIFIC VOLWE SHRINKAGE BAIIT VOL Q RMT VOL Q B/A ADDED TOTAL B/A TOTAL S'TS. IIASS FINAL CONC. ( I (F) (paia) (cu.ft./Iba) NABS(lba) 70 F (gal) 50 F (gal) (Ill ( Iba) (lba) (ppa boron) ( TI Tf VI Vf I

                                                                                                                                                  -I 557        557      2200 1.00000     1.00000           0.0         0.0           ,0.0          0.0           0.0     467,651 ~ 2        O.O (

557 510 2200 0.02157 0.02032 27,319 3 3,280.0 0.0 772.5 772.5 495,743.0 272A ( 510 C90 2200 0.02032 0.01990 9,972.2 1,197.3 0.0 282.0 1,054.5 505,997.1 364.4 ( 490 480 2200 0.01990 0.01970 4,898.1 588.'I 0.0 138.5 1,193.0 511,033.7 408.1 ( 480 471 2200 0.01970 0.01953 4,267.4 512.4 0.0 120.7 1,313.7 515,421.8 445.6 ( 471 460 2200 0.01953 0.01933 5,061.2 0.0 606.6 63.1 1,376.7 520,546.2 462.4 ( C60 450 2200 0.01933 0.01916 4,406.9 0.0 528.2 54.9 1,431.7 525,008.0 476.8 ( 450 440 2200 0.01916 0.01900 4,219.8 0.0 505.& 52.6 1,484.2 529,280A 490.3 ( 4CO 430 2200 0.01900 0.01885 4,021.1 0.0 482.0 50.1 1,534A 533,351.6 503.0 I 430 420 2200 0.01885 0.01870 4,085.6 0.0 489.7 50.9 1,585.3 537,488.1 515.7 I 420 410 2200 0.01870 0.01855 4,151.7 0.0 497.6 51.7 1,637.0 541,691.5 528.4 I 410 400 2200 0.01855 0.01842 3,652.8 0.0 437.8 45.5 1,682.5 545,389.8 539.4 I Coo 390 2200 0.01842 0.01828 3,991.9 0.0 478.5 C9.7 1,732.3 549,C31.4 551.2 I 390 380 2200 0.0182S 0.01816 3,470.6 0.0 416.0 43.3 1,775.5 552,945.3 561A I 380 370 2200 0.01816 0.01804 3,516.8 0.0 421.5 C3.8 1,819A 556,505.9 571.6 I 370 360 2200 0.01S04 0.01792 :3,563.9 0.0 427.2 CC.C 1,863.8 560,114.2 581.8 I 360 350 2200 0.01792 0.017S1 3,309.1 0.0 396.6 C1.2 1,905.0 563,C6C.S 591.1 I 2200 0.01781 0.01770 3,350.2 0.0 401.6 41.8 1,946.8 566,856.5 600.C ( 350 340 340 330 2200 0.01770 0.01759 3,392.1 0.0 406.6 42.3 1,989.0 57o,290.8 609.8 ( 330 325 2200 0.01759 0.01754 1,555.9 0.0 186.5 19.4 2,008A 571,866.2 61C.O ( 325 310 26S 0.01754 0.0175C 0.0 0.0 0.0 0.0 2,008.4 581,402.9 604.0 ( 310 300 268 0.01754 0.01744 3,138.6 0.0 376.2 39.1 2,047.5 584,5N.7 612.4 I 300 260 268 0.01744 0.01707 11,932.7 0.0 1,430.3 148.7 2,196.2 596,662.1 643.5 ( 260 235 26S 0.01707 0.01687 6,668.0 0.0 799.2 83.1 2,279.3 603,413.2 660.4 ( 235 210 268 0.01687 0.01669 6,137.9 0.0 735.7 76.5 2,355.8 609,627.5 675.6 ( 210 200 268 0.01669 0.01662 2,422.9 0.0 290.C 30.2 2,3S6.0 612,080.6 681.5 ( I TOTAL BANI'OLINE 5577.7 gallons I I

TABLE 2-27 ST. LUCIE UNIT 1 PLANT COOLDOUN FROH 557 F TO 200 F; BAHT AT 2.5 Mt% BORIC ACID; RMT AT 2150 ppa BORON IAVG.STS. TEKP. PZR PRESS SPECIFIC VOL(WE SHRINKAGE BAHT VOL Q RUT VOL Q 8/A ADDED TOTAL 8/A TOTAL STS. HASS FINAL CONC. I (f) (psfe) (cu.f t./lba) HASS(lba) 70 F (gal) 50 f (gal) (lba) (lba) (Iba) (ppa boron) I TI Tf VI Vf I I 557 557 2200 1.00000 1.00000 0.0 0.0 0.0 0.0 0.0 467,651.2 0.0 I 510 2200 0.02157 0.02032 27,3'19.3 3,280.0 0.0 700.5 700.5 495,671.0 247.1 I 557 510 490 2200 0.02032 0.01990 9,972.2 1,197.3 0.0 255.7 956.2 505,898.8 330.4 I 490 480 2200 0.01990 0.01970 4,898.1 588.1 0.0 125.6 1,081.8 510,922.5 370.2 I 2200 0.01970 0.01951 4,746.2 569.8 0.0 121.7 1,203.5 515,790.4 407 9 I 480 470 470 460 2200 0.01951 0.01933 4,582.5 550.2 0.0 117.5 1,321.0 520,490.4 443.7 I 460 450 2200 0.01933 0.01916 4,406.9 529.1 0.0 113.0 1,434.0 525,0'l0.3 477.5 I 440 2200 0.01916 0.01900 4,219.8 0.0 505.8 52.6 1,486.5 529,282.7 491.0 I 450 430 2200 0.01900 0.0'I885 4,021.1 0.0 482.0 50.1 1,536.6 533,353;8 503.7 I 440 430 420 2200 0.01885 0.01870 4,085.6 0.0 489.7 50.9 1,587.6 537,490.4 516 4 I 420 410 2200 0.01870 0.01855 4,151.7 0.0 497.6 51.7 1,639.3 541,693.8 529.1 2200 0.01855 0.01842 3,652.8 0.0 437.8 C5.5 1,684.8 5C5,392.1 5C0.1 I 410 COO 400 390 2200 0.01842 0.01828 3,991.9 0.0 478.5 49.7 1,734.6 549,433.7 552.0 I 380 2200 0.01828 0.01816 3,470.6 0.0 416.0 43.3 1,777.8 552,947.6 562.1 I 390 370 2200 0.01816 0.01804 3,516.8 0.0 421.5 43.8 1,821.6 556,508.2 572.3 I 380 360 2200 0.01804 0.01792 3,563.9 0.0 427.2 C4.4 1,866.1 560,116.5 582.5 I 370 350 2200 0.01792 0.01781 3,309.1 0.0 396.6 41.2 1,907.3 563,466.S 591.8 I 360 350 340 2200 0.01781 0.01770 3,350 ' 0.0 401.6 41.S 1,949.0 566,858.8 601 ' I 330 2200 0.01770 0.01759 3,392.1 0.0 406.6 C2.3 1,991.3 570,293.1 610.5 I 340 330 325 2200 0.01759 0.01754 1,555.9 0.0 186.5 19.C 2,010.7 571,868.5 614.7 I 310 268 0.01754 0.0175C 0.0 0.0 0.0 0.0 2,010.7 581,405.2 604.6 ( 325 310 300 268 0.01754 0.017C4 3,138.6 0.0 376.2 39.1 2,049.8 584,583.0 613.0 I 300 260 268 0.01744 0.01707 11,932.7 0.0 1,430.3 148.7 2,198.5 596,664.3 644.2 I 260 235 268 0.01707 0.016S7 6,668.0 0.0 799.2 83.1 2,281.6 603,415.5 661.1 I 235 210 268 0.01687 0.01669 6,137.9 0.0 735.7 76.5 2,358.1 609,629.8 676.3 I 210 200 268 0.01669 0.01662 2,422.9 0.0 290.4 30.2 2,388.3 612,M2.9 6S2.2 I I ITOTAL BAHT VOLINE 6714.5 gallons I I I

TABLE 2-28 ST. LUCIE UNIT 1 PLANT COOLDOMN FROH 557 F TO 200 F; BAHT AT 3.5 at% BORIC ACID; Rgt AT 2300 gxn BORON SPECIFIC VOLUHE SHRINKAGE BAHT VOL 9 Rllt VOL 9 B/A ADDED TOTAL 8/A TOTAL STS. IIASS FINAL CONC. ) IAVG STS TEHP PZR PRESS (F) (ps la) (cu. ft./Ibn) HASS(lbn) 70 F (gal) 50 F (gal) (lbn) (lbn) (lbn) (ppm boron) [ ( Ti Tf Vi Vf I 557 2200 1.00000 1.00000 0,0 0.0 0.0 0.0 0.0 467,651.2 0.0 ) 557 5'l1 2200 0.02157 0.02034 26,761.9 3,213.1 0.0 970.6 970.6 495,383.7 342.6 ) 557 0.02034 0.01990 10,529.6 0.0 'l,262.1 140.4 1,111.0 506,053.6 383.8 i 511 490 '80 490 2200 2200 0.01990 0.01970 0.01970 0.01951 4,898.1 4,746.2 0.0 0.0 587.1 568.9 65.3 63.3 1,176.3 1,239.6 511,017.0 515,826.5 402 4 420.1 I

480 470 2200 2200 0.01951 0.01933 4,582.5 0.0 549.3 61.1 1,300.6 520,470.1 436.9 f 470 460 2200 0.01933 0.01916 4,406.9 0.0 528.2 58.7 1,359.4 524,935.7 452.8 ) 460 450 440 2200 0.01916 0.01900 4,219.8 0.0 505.8 56.2 1,415.6 529,211.8 467.7 ) 450 2200 0.01900 0.01885 4,021.1 0.0 482.0 ~ 53.6 1,469.2 533,286.4 481.7 ) 440 430 420 2200 0.01885 0.01870 4,085.6 0.0 489.7 54.5 1,523.7 537,426.5 495.7 f 430 2200 0.01870 0.01855 4,151.7 0.0 497.6 55.3 1,579.0 541,633.5 509.7 I 420 410 400 2200 0.01855 0.01842 3,652.8 0.0 437.8 48.7 1,627.7 545,335.0 521.8 i 410 2200 0.01842 0.01828 3,991.9 0.0 478.5 53.2 'I,680.9 549,380.1 534.9 [ 400 390 2200 0.01828 0.01816 3,470.6 0.0 416.0 46.3 1,727.2 552,897.0 546.2 ) 390 380 2200 0.01816 0.01804 3,516.8 0.0 421.5 46.9 1,774.1 556,460.6 557.4 I 380 370 2200 0.01804 0.01792 3,563.9 0.0 427.2 47.5 1,821.6 560,072.0 568.6 i 370 360 2200 0.01792 0.01781 3,309.1 0.0 396.6 44.1 1,865.7 563,425.2 578.9 f 360 350 2200 0.01781 0.01770 3,350.2 0.0 401.6 44.7 1,910.3 566,820.1 589.2 I 350 340 2200 0.01770 0.01759 3,392.1 0.0 406.6 45.2 1,955.6 570,257.4 599.6 ) 340 330 2200 0.01759 0.01754 1,555.9 0.0 186.5 20.7 1,976.3 571,834.1 604.2 ) 330 325 268 0.01754 0.01754 0.0 0.0 0.0 0.0 1,976.3 581,370.8 594.3 i 325 310 268 0.01754 0.01744 3,138.6 0.0 376.2 41.8 2,018.1 584,551.3 603.6 / 310 300 0.01744 0.01707 11,932.7 0 ' 1,430.3 159.1 2,177.2, 596,643.0 638.0 ) 300 260 268 268 0.01707 0.01687 6,668.0 0.0 799.2 88.9 2,266.1 603,399.9 656.6 I 260 235 268 0.01687 0.'01669 6,137.9 0.0 735.7 81.8 2,347.9 609,619.6 673.4 i 235 210 210 200 268 0.01669 0.01662 2,422.9 0.0 290 ' 32.3 2,380.2 612,074.8 679 9 I I (TOTAL BAHt VOLNE 3213.1 gallons I I I

TABLE 2-29 ST LUCIE UNIT 1 PLANT COOLDONN FROH 557 F TO 200 FI BAHT AT 3.25 MtX BORIC ACIOI RUT AT 2300 Ppa BORON IAVG'STS TEHP PZR PRESS SPECIFIC VOLUHE SHRINKAGE BAHT VOL Q RUT VOL Q B/A ADDED TOTAL 8/A TOTAL STS. HASS FINAL CONC.) (F) (pais) f (cu. t./Iba) HASS(lba) 70 F (gal) 50 F (get) (Iba) ( lba) (lba) (ppa boron) ) Tl Tf Vi Vf

                                                                                                                                                   --II 557        557     2200   1.00000    1.00000           0.0         0.0         0.0          0.0            0.0       467,65'1.2        0.0  I 557        510     2200   0.02157    0.02032     27,319.3      3,280.0         0.0       917.7          917.7        495,888.2       323.6 )

5'IO 504 2200 0.02032 0.02019 3,M9.4 370.9 0.0 103.8 1,021.5 499,081 4 357.8 ) 504 480 2200 0.02019 0.01970 11,780.9 0.0 1,412.1 157.0 1,178.5 511,019.3 403.2 i 480 470 2200 0.01970 0.01951 4,746.2 0.0 568.9 63.3 1,241.8 515,828.7 420.9 I 470 460 2200 0.01951 0.01933 4,582.5 0.0 549.3 61.1 1,302.9 520,472.3 437.7 ( 460 450 2200 0.01933 0.01916 4,406.9 0.0 528.2 58.7 1,361.6 524,938.0 453.5 I 450 440 2200 0.01916 0.01900 4,219.8 0.0 505.8 56.2 - I,417.9 529,214.0 468.4 ) 440 430 2200 0.01900 0.01885 4,021 ~ 1 0.0 482.0 53.6 1,471.5 533,288.7 482.4 ) 430 420 2200 0.01885 0.01870 4,085.6 0.0 489.7 54.5 1,525.9 537,428.7 420 410 2200 0.01870 0.01855 4,151.7 0.0 497.6 55.3 1,581.3 541,635.7 510.4 I 410 400 2200 0.01855 0.01842 3,652.8 0.0 437.8 . 48.7 1,630.0 545,337.2 522.6 ) 400 390 2200 0.01842 0.01828 3,991.9 0.0 478.5 53.2 1,683.2 549,382.3 535.6 I 390 3M 2200 0.01828 0.01816 3,470.6 0.0 416.0 46.3 1,729.4 552,899.2 546.9 ) 380 370 2200 0.01816 0.01804 3,516.8 0.0 421.5 46.9 1,776.3 556,462.9 558.1 I 370 360 2200 0.01804 0.01792 3,563.9 0.0 427.2 47.5 1,823.8 560,074.2 569.3 I 360 350 2200 0.01792 0.01781 3,309.1 0.0 396.6 44.1 1,867.9 563,427.4 579.6 ) 350 340 2200 0.01781 0.01770 3,350.2 0.0 401.6 44.7 1,912.6 566,822.3 589.9 ( 340 330 2200 0.01770 0.01759 3,392.1 0.0 406.6 45.2 1,957.8 570,259.6 600.2 ) 3M 325 2200 0.01759 0.01754 1,555.9 0.0 186.5 20.7 1,978.5 571,836.3 604.9 325 310 268 0.01754 0.01754 0.0 0.0 0.0 0.0 1,978.5 581,373.0 595.0 ) 310 300 268 0.01754 0.01744 3,138.6 0.0 376.2 41.8 2,020.4 584,553.5 604.3 ) 300 260 268 0.01744 0.01707 11,932.7 0.0 1,430.3 159.1 2,179.4 596,645.3 638.6 ) 260 235 268 0.01707 0.01687 6,668.0 0.0 799.2 88.9 2,268.3 603,402.2 657.2 i 235 210 268 0.01687 0.01669 6,137.9 0.0 735.7 81.8 2,350.1 609,621.9 674.0 I 0 210 200 268 0.01669 0.01662 2,422.9 0.0 290.4 32.3 2,382.4 612,077.0 680.5 teal / ITOTAL BAHT VOLINE 3650.9 gallons I

TABLE 2-30 ST. LUClE UNlT 1 PLANT COOLDOMN FROI 557 F TO 200 F; SANT AT 3.0 at% BORlC AClD; RllT AT 2300 ppn BORON IAVG.STS. TENP. PZR PRESS SPEClFlC VOL(NE SHRINKAGE SAIIT VOL 8 RMT VOL 8 8/A ADDED TOTAL 8/A TOTAL SYS. NABS FlNAL CONC. I (F) (psie) (cu.ft./thn) NASS(lhn) 70 F (gnl) 50 F {gal) (lhn) (lhn) (lhn) (ppn boron) I Tl Tf Vl Vf I 557 557 2200 1.00000 1.00000 0.0 0.0 0.0 0.0 0.0 467,651.2 0.0 I 557 510 2200 0.02157 0.02032 27,319.3 3,280.0 0.0 844.9 844.9 495,815 A 297.9 I 510 495 2200 0.02032 0.02000 7,559.8 907.7 0.0 233.8 1,078.7 SD3,609.1 374.5 I 495 480 2200 0.02000 0.01970 7,310.C 0.0 876.2 97.4 1,176.2 511,016.9 402.4 I 480 470 2200 0.01970 0.01951 4,746.2 0.0 568.9 63.3 1,239.5 515,826.C 420.1 I 470 460 2200 0.01951 0.01933 4,582.5 0.0 549.3 61.1 1,300.5 520,4?0.0 436.9 I 460 450 2200 0.01933 0.01916 4,406.9 0.0 528.2 58.7 1,359.3 52C,935.6 452.7 I 450 440 2200 0.0'l916 0.01900 4,219.8 0.0 505.8 56.2 1,415.5 529,211.7 467.6 I 440 430 2200 0.01900 0.01885 4,021.1 0.0 482.0 53.6 1,C69.1 533,286.3 481.6 I 430 420 2200 0.01885 0.01870 C,085.6 0.0 C89.7 54.5 1,523.6 537,426.C 495.7 I 420 410 2200 0.01870 0.01855 4,151.7 0.0 C97.6 55.3 1,578.9 541,633 A 509.7 I 410 400 2200 0.01855 0.01842 3,652.8 0.0 437.8 48.7 1,627.6 545,334.9 521.8 I 400 390 2200 0.01842 0.01828 3,991.9 0.0 478.5 53.2 1,680.8 5C9,380.0 534.9 I 390 380 2200 0.01828 0.01816 3,470.6 0.0 416.0 46.3 1,727.1 552,896.9 546.1 I 380 370 2200 0.01816 0.01804 3,516.8 0.0 421.5 C6.9 1,774.0 556,C60.5 557.4 I 370 360 2200 0.01804 0.01792 3,563.9 0.0 427.2 47.5 1,821.5 560,071.9 568.6 I 360 350 2200 0.01792 0.01781 3,309.1 0.0 396.6 44.1 1,865.6 563,425.1 578.9 I 350 340 2200 0.01781 0.01770 3,350.2 0.0 401.6 44.7 1,910.2 566,820.0 589.2 I 340 330 2200 0.01770 0.01759 3,392.1 0.0 406.6 45.2 1,955.5 570,257.3 599.5 I 330 325 2200 D.D'1759 O.D1754 1,555.9 0.0 186.5 20.7 1,976.2 571,834.0 604.2 I 325 310 268 0.01754 0.01754 0.0 0.0 0.0 0.0 1,976.2 581,370.7 594.3 I 310 300 268 0.01754 0.01744 3,138.6 0.0 376.2 41.8 2,018.0 584,551.2 603 6 I 300 260 268 0.01744 0.01707 11,932.7 0.0 1,430.3 159.1 2,177.1 596,6C2.9 638.0 I 260 235 268 0.01707 0.01687 6,668.0 0.0 799.2 88.9 2,266.0 603,399.8 656.6 I 235 210 268 0.01687 0.01669 6,137.9 0.0 735.7 81.8 2,347.8 609,619.5 673.3 I 210 200 268 0.01669 0.01662 2,422.9 0.0 290.4 32.3 2,380.1 612,074.7 679.9 I ITOTAL BANT VOLWE 4187.7 gnllons I

TABLE 2-31 ST LUCIE UHIT 1 PLANT COOLDONI FROH 557 F TO 200 F; BAHT AT 2.75 at% BORIC ACID; RMT AT 2300 ga BORN IAVG.SYS TEHP PZR PRESS SPECIFIC VOLUHE SHRIRKAGE BAHT VOL 8 RllT VOL 8 8/A ADDED TOTAL 8/A TOTAL STS. HASS FINAL CNC. ( ( (F) (psia) (cu.ft./tba) HASS(tbs) 70 F (gat) 50 F (gat) (tba) (the) (tbs) (ppm boron) ( Ti Tf Vi Vf I

                                                                                                                                                   -I 557        557      2200  1.00000    1.00000          0.0          0.0          0.0          0.0              0.0       467,651.2        0.0 I 557        510      2200  0.02157    0.02032     27,319.3      3,280.0          0.0       772.5             772.5       495,743.0      272A (

510 490 2200 0.02032 0.01990 9,972.2 1,197.3 0.0 282.0 1,054.5 505,997.1 36CA ( C90 482 2200 0.01990 0.01974 3,910.5 469.5 0.0 110.6 1,165.1 510,018.2 399.4 ( C82 470 2200 0.01974 0.01951 5,733.S 0.0 687.3 76A 1,241.5 515,828.4 420.8 I 470 460 2200 0.01951 0.01933 4,582.5 0.0 SC9.3 61.1 1,302.6 520,C72.0 437.6 I C60 450 2200 0.01933 0.01916 4,406.9 0.0 528.2 58.7 1,361.3 524,937.7 453A I C50 CCO 2200 0.01916 0.01900 4,219.8 0.0 505.8 56.2 1,417.6 529,213.7 468.3 ( 440 430 2200 0.01900 0.01M5 4,021.1 0.0 482.0 '3.6 1,471.2 533,288A 482.3 ( 430 420 2200 0.01885 0.01870 4,085.6 0.0 489.7 5C.5 1,525.6 537,C28A C96.3 ( 420 C10 2200 0.01870 0.01855 4,151.7 0.0 497.6 55.3 1,581.0 541,635.4 5103 I 410 400 2200 0.01855 0.01842 3,652.8 0.0 437.8 48.7 1,629.7 545,336.9 522.5 ( 400 390 2200 0.01842 0.01828 3,991.9 0 ' 478.5 53.2 1,682.9 5C9,382.0 535.6 I 390 380 2200 0.0182S 0.01816 3,470.6 0.0 416.0 46.3 1,729.1 552,898.9 546.8 ( 380 370 2200 0.01816 0.01804 3,516.8 0.0 421.5 46.9 1,776.0 556,462.6 558.0 I 370 360 2200 0.01804 0.01792 3,5Q.9 0.0 427.2 47.5 1,823.5 560,073.9 569.2 I 360 350 2200 0.01792 0.01781 3,309.1 0.0 396.6 44.1 1,867.6 5Q,427.1 579.5 ( 350 340 2200 0.01781 0.01770 3,350.2 0.0 401.6 C4.7 1,912.3 566,822.0 589.8 ( 340 330 2200 0.01770 0.01759 3,392.1 0.0 406.6 45.2 1,957.5 570,259.3 600.1 ( 330 325 2200 0.01759 0.01754 1,555.9 0~0 186.5 20.7 1,978.2 571,836.0 604.8 I 325 310 268 0.01754 0.01754 0.0 0.0 0.0 0.0 1,978.2 581,372.7 59C.9 ( 310 300 26S 0.01754 0.017C4 3,13S.6 0.0 376.2 41.8 2,020.1 5S4,553.2 604.2 ( 300 260 268 0.01744 0.01707 11,932.7 0.0 1,430.3 159.1 2,179.1 596,645.0 638.6 ( 260 235 26S 0.01707 0.01687 6,668.0 0.0 799.2 88.9 2,268.0 603,CO1.9 657.2 I 235 210 268 0.01687 0.01669 6,137.9 0.0 735.7 81.8 2,349.8 609,621.6 673.9 ( 210 200 268 0.01669 0.0'l662 2,422.9 0.0 290.4 32.3 2,382.1 612,076.7 680.4 ( TOTAL BAHT VOLUHE 4946.8 gattons

TABLE 2-32 ST. LUCIE (F) (psfa) TI Tf VI 557 510 2200 0.02157 C90 480 2200 0.01990 480- 470 2200 0.01970 470 463 2200 0.01951 463 450 2200 0.01938 430 420 2200 0.01885 C20 410 2200 0.0'!870 COO 390 2200 0.01842 390 380 2200 0.01828 380 , 370 2200 0.01816 360 = 350 2200 0.01792 350 340 2200 0.01781 340 330 2200 0.01770 330 325 2200 0.01759 325 310 268 0.0175C 310 300 268 0.01754 300 260 268 0.01744 260 235 268 0.01707 235 210 268 0.01687 TOTAL BAHT VOLTE 6019.3 gallons UHIT 1 PLAllT COOLDOQI FROH 557 F TO 200 FI BAHT AT 2.50 sttX BORIC ACIDI RMT AT 2300 ppNNROK'AVG STS. TEHP PZR PRESS SPECIFIC VOLUHE SHRINKAGE BAHT VOL Q RllT VOL Q B/A ADHD TOTAL B/A TOTAL STS. HASS FIHAL COHC. ) (cu.ft./Iba) HASS(lha) 70 F (gal) 50 F (gal) (Ibm) (Iba) (Iha) (ppa boron) [ Vf I 557 557 2200 1.00000 1.00000 0.0 0.0 0.0 LO 0.0 467,651.2 0.0 / 0.02032 27,319.3 3,280.0 0.0 7N.5 700.5 495,671.0 247.1 I 510 490 2200 0.02032 0.01990 9,972.2 1,197.3 0.0 25).7 956.2 505,898.8 330.4 ) 0.01970 4,898.1 588.1 0.0 IZL6 1,081.8 510,922.5 370.2 ) 0.01951 4,746.2 569.8 0.0 121.7 1,203.5 515,790.4 407.9 ) 0.01938 3,198.8 384.1 0.0 82.0 1,285.5 519,071.2 433.0 ) 0.01916 5,790.6 0.0 694.1 772 1,362.7 524,939.0 453.8 I 450 4CO 2200 0.01916 0.01900 4,219.8 0.0 505.8 5L2 1,418.9 529,215.0 468.d I 440 430 2200 0.01900 0.01885 4,021.1 0.0 482.0 5ib 1,472.5 533,289.7 482.7 ) 0.01870 4,085.6 0.0 489.7 5Li 1,527.0 537,429.8 496.7 ) 0.01855 4,15'I.7 0.0 497.6 Su 1,582.3 541,636.8 510.8 I 410 COO 2200 0.01855 0.01842 3,652.8 0.0 437.8 CL7 1,631.0 545,338.3 522.9 ) 0.01828 3,991.9 0.0 478.5 5LZ 1,684.2 549,383.4 536.0 ( 0.01816 3,470.6 0.0 416.0 CL3 1,730.5 552,900.2 547.2 ) 0.01804 3,516.8 0.0 421.5 449 1,777.4 556,C63.9 558.4 I 370 360 2200 0.01804 0.01792 3,563.9 0.0 427.2 478 1,82C.9 560,075.3 569.7 ) 0.01781 3,309.1 0.0 396.6 CC.I 1,869.0 563,428.5 579.9 ) 0.01770 3,350.2 0.0 401.6 CL7 1,913.6 566,823.3 590.2 ) 0.01759 3,392.1 0.0 406.6 Cu 1,958.8 570,260.7 600.6 ) 0.01754 1,555.9 . 0.0 186.5 ZI.7 1,979.6 571,837.3 605.2 ) 0.'01754 0.0 0.0 0.0 I.O 1,979.6 581,374.1 595.3 / 0.01744 3,138.6 0.0 376.2 41.8 2,021.4 584,554.6 604.6 / 0.01707 11,932.7 0.0 1,430.3 151.1 2,180.5 596,646.3 638.9 ) 0.01687 6,668.0 0.0 799.2 BL9 2,269.4 603,C03.2 657.5 ) 0.01669 6,137.9 0.0 735.7 BLB 2,351.2 609,622.9 674.3 I 210 200 268 0.01669 0.01662 2,422.9 0.0 290.4 3u 2,383.5 612,078.0 680.d )

Table 2-33 Required Boron Concentration for a Cooldown from 557 Degrees to 200 Degrees Temperature Concentration De rees F m boron 557 -56.0 510 96.0 480 192.0 470 220.0 460 249.0 450 275.0 440 300.0 430 325.0 410 369.0 400 390.0 380 429.0 370 446.0 350 480.0 340 496.0 330 511.0 325 518.0 310 539.0 300 552.0 260 601.0 235 630.0 210 657.0 200 667.0 199.9* 564.0 199.94k 595.0

            *Note: After Shutdown margin change from 3.6% delta k/k to  2.0% delta k/k.
            ~Note:    The  boration requirement for a 2.0% shutdown margin and  core is xenon free.

CEN-353(F), Rev. 03 Page 72 of 118

Table 2-34 Minimum Boric Acid Makeup Tank Volume vs. Stored Boric Acid Concentration for Modes 1, 2, 3, and 4 mum Volume a ons BAHT RWT at RWT at RWT at RWT at RWT at ~Co c ~~Oem ~1850 m $ 00~0 Q 50~re ~2300 m 3.5 4,887.7 4,535.6 4,130.1 3,713.2 3,213.1 j 3.25 5,406.0 5,065.4 4,594.0 4,130.1 3,650.9 3.0 6,185.4 5,689.8 5,235.2 4,769.9 4,187.7 2.75 6,966.8 6,607.9 6,129.9 5 577 7 4,946.8 2.50 8,194.5 7,703.9 7,221.1 6,714.5 6,019.3 CEN-353(F), Rev. 03 Page 73 of 118

Table 2-35 Calculation of the 17,000 Gallon Volume In Specification 3/4.1.2 12,552.2 gallons Cooldown to 325 degrees and 268 psia (Part A) +8,413.0 Cooldown to 200 degrees on shutdown cooling (Parts B & C) ~488 7 Smallest BAMT inventory value for 1720 ppm Boron in the RVZ from Table 2-34 16,077.5 gallons Total 17,000.0 gallons Total rounded up to the nearest 1000 gallons CEN-353(F), Rev. 03 Page 74 of 118

Table 2-36 Calculation of the 13,000 Gallon Volume In Specification 3/4.1.2 12,552.2 gallons Cooldown to 325 degrees and 268 psia (Part A) +8,413.0 Cooldown to 200 degrees on shutdown cooling (Parts B & C) ~84 5 Greatest BAMT inventory value for 1720 ppm Boron in the RWT from Table 2-34 12,770.7 gallons Total 13,000.0 gallons Total rounded up to the nearest 1000 gallons CEN-353(P), Rev. 03 Page 75 of 118

Table 2-37 Calculation of the 45,000 Gallon Volume In Specification 3/4.1.2 for St. Lucie 1 23,100.0 gallons System feed-and-bleed (Part A) 12,552.2 Cooldown to 325 degrees and 268 psia (Part B) + 8,413.0 Cooldown to 200 degrees on shutdown cooling (Parts C & D) 44,065.2 gallons Total 45,000.0 gallons Final volume (Part E) rounded up to the nearest 1000 gallons. CEN-353(F), Rev. 03 Page 76 of 118,

FIGURE 2 1 BORIC ACID SOLUBILITY IN WATER (weight 5) 18 17 16 15 14 13 12 r Ql 11 0 10 9 8 m 7 0 6 f/l 5 2 0 20 60 80 100 120 160 TEMPERATURE (degrees F)

O aWI Ul lJ FIGURE 2 2 ST. LUCIE 1 EFFECT OF COOLDOIhtN RATE ON BORATlON REQUIREMENT 800 700 z0 600 K 0 m 500 E 400 z0 0 0 N 300 0 K 200 QO V hl 100

          -100 150      250                350               450      550 TEMPERATuRE (F) 12.5 F/hr         +   25 F/hr               4    50 F/hr

I FIGURE 2 3 ST. LUCIE 4J Vl l4 1 RCS BORON CONC vs TEMP FOR MAKEUP FROM BAMT 690 680 670 z0 K 0 660 m E 650 z0 P td 630 z00 O 620 oq N 0 . 610 0 600 590 120 160 180 200 220 TEMPERATURE (F) 0 CURVE 1,REQOIREDppm + CURVE 2, ACTUAL ppm

O W R FIGURE 2 4 ST. LUCIE I 1 RCS BORON CONC vs TEMP FOR MAKEUP FROM RIIItl 690 680 670 X 0 K 0 660 m E 650 X 0 P 630 u X 0 620 N O ca o 610 0 600 590 t 120 160 180 200 220 TEMPERATURE (F)

                                          +    CURVE 2, ACTUAL ppm

FIGURE 2 5 ST. LUCIE 1 RCS BORON CONC vs TEMPERATURE for 12.5 F/hr COOLDOWN 700 600 z0 K 0 E 400 0 300 l= hl 200 t($ z00 e N 100 co 0 0 0

          -100
                -600             -500                                 -300            -200 TEMPERATURE (F) 0    CURVE 1,REQUIREDppm                             +    CURVE 2, ACTUAL ppm

FIGURE 2 6 ST. LUCIE 1 MIN BAMT VOLUME VS STORED BAMT CONCENTRATION 10 a f 0 0 Ql hl a Q C ~ a 3 p Z 2A 2;6 2.8 3.0 3.2 34. 3.6 STORED BAMT CONC (vent 7 boric acid) 0 1720 ppm + 1850 ppm 0 2000 ppm b 2150ppm X 2300 in RHT in RWT in RWT in RMT in

I 4l FIGURE 2 7 ST. LUCIE Ul LA 1 REQUIRED vs ACTUAL CONC FOR BTP 5-1 COOLDONN 700 600 500 z0 K 400 E 300 Z 0 P 100 bl zO0 oo 0 0 N CO O

        -100 0
        -300 TIME (hours) 0  REQUIRED CONC                     +   ACTUAL CONC

FIGURE 2 8 ST. LUCIE 1 REQUIRED vs ACTUAL CONC FOR BTP 5-1 COOLOOWN 500 z0 K 300 0 m E 200 0 100 P hl O z0 O rn -100 CO U 0

       -200
       -300 3.4        3.S            4.2          4.6       54 TIME (t ourn)

Cl'EQUIRED CONC + ACTUAL CONC

I 4J FIGURE 2 9 ST. LUCIE Ul 4> 1 RCS BORON CONC vs TEMPERATURE for RWT COOLDOWN SOO 800 z0 700 K 0 600 fA 500 Z 0 P hl 300 U X 0 00 U N c Vl O 0

           -600.0                     -400.0                         -200.0 TEMPERATURE (F) 0   CURYE),REQUIREDppm                      +    CUR% 2, ACTUAL ppm

3.0 0 ON

3.1 INTRODUCTION

TO THE OPERATIONAL ANALYSIS The remaining Sections of this report present the results of an evaluation performed in order to demonstrate the general impact on plant operations of a reduction in boric acid makeup tank concentration. The specific areas that will be discussed include operator response to emergency situations, typical plant feed-and-bleed operations, typical plant blended makeup operations, plant shutdown to refueling, and plant shutdown to cold shutdown. Because it is obviously an impossible task to evaluate each of these five areas and consider all possible combinations of plant conditions, initial plant parameters and analysis assumptions that were used in the evaluation were selected, where possible, in a conservative manner in order to give worst case type answers. As a consequence, the results, i.e., the volumes and final concentrations that were obtained, should in general be bounding for any event or any set of initial plant conditions. 3.2 RESPONSE TO EMERGENCY SITUATIONS In general, credit is not taken for boron addition to the reactor coolant system from the boric acid makeup tanks for the purpose of reactivity control in the accidents analyzed in Chapter 15 of the plant's Final Safety Analysis Report. The response of an operator, therefore, to such events as steam line break, overcooling, boron dilution, etc., will not 'e affected by a reduction in boric acid makeup tank concentration. In particular, the action statements associated with Technical Specification 3.1.1.1 and Technical Specification 3.1.1.2 require that boration be commenced at greater than 40 gallons per minute using a solution of at least 1720 ppm boron in the event that shutdown margin is lost. Such statements are conservatively based upon the refueling water tank CEN-353(F), Rev. 03 Page 86 of 118

concentration and are therefore independent of the amount of boron in the BAMTs. In addition, the acceptance criteria developed for the Reactivity Control Section of the Functional Recovery Guidelines of Reference 4.2 are based upon a boron addition rate of 40 gallons per minute and are also independent of the exact boration source concentration. 3.3 FEED-AND-BLEED OPERATIONS During a feed-and-bleed operation to increase system boron content, the charging pumps are used to inject concentrated boric acid into the RCS with the excess inventory normally being diverted to the liquid waste i system v a letdown. The rate of increase in boron concentration is proportional to the difference between the system concentration at any given time and the concentration of the charging fluid. From this basic relationship, an equation describing feed-and-bleed can be derived. (Appendix 1 contains the derivation of the reactor coolant system feed-and-bleed equation) ~ In general, if the concentration within the boric acid makeup tanks is reduced to the point where heat tracing is no longer required, the maximum rate of change of RCS boron concentration that an operator can expect to see during feed-and-bleed will be less than currently achievable. The purpose of the evaluation performed in this section of the report was to show the exact feed-and-bleed rates that can be expected using boric acid makeup tanks having a reduced concentration. The analysis was done assuming hot zero power conditions with other key parameters and conditions shown in Table 3-1. Both a one charging pump and a two charging pump feed-and-bleed were evaluated from two initial system concentrations: zero ppm and 800 ppm. The results are presented in Table 3-2 to Table 3-5. Equation 9.0 of Appendix 1 was used to generate the results in these tables. The value of the system mass used to obtain CEN-353(F), Rev. 03 Page 87 of 118

the time constant in Equation 9.0 was calculated as follows for St. Lucie 1: RCS loop PZR or 9,601 ft ft 3 (m ) w 0.020854 fk./lb'60 0.02669 ft /ibm From this system mass (477,626.2 ibm), the value of the feed-and-bleed time constant for one charging pump is 477 626 2 bm 40 40 gpm x 8.329 ibm/gallon (3) or 40 1,433.6 min. and the value of the feed-and-bleed time constant for two charging pumps is 4 6 bm 84 84 gpm x 8.329 ibm/gallon (3) or 682.7 min. 84 (1) Specific volume of compressed water at 532 degrees and 2200 psia. (2) Specific volume of saturated water at 2200 psia. (3) Water density at 70 degrees. CEN-353(F), Rev. 03 Page 88 of 118

Several of the concentration results shown in Table 3-2 through Table 3-5 are plotted in Figures 3-1 and 3-2 for comparison. Note that significant feed-and-bleed rates will be achievable following the reduction in boric acid makeup tank concentration levels. 3.4 BLENDED MAKEUP OPERATIONS During typical plant blending operations, concentrated boric acid via FCV-2210Y is mixed with demineralized water via FCV-2210X at the blending tee and then added to the volume control tank. Since the ability to blend and add makeup to the reactor coolant system and to other systems is important to plant operations, three different parametric studies were performed in order to demonstrate the effect of a reduction in boric acid makeup tank concentration. The studies performed were as follows:

1. Flow through FCV-2210Y is varied between 0.5 gpm and 15.0 gpm while the flow through FCV-2210X is varied to give a total flow out of the blending tee of 44 gallons per minute.

2. Flow through FCV-2210Y is varied between 0.5 gpm and 15.0 gpm while the flow through FCV-2210X is varied to give a total flow out of the blending tee of 88 gallons per minute.

3. Flow through FCV-2210Y is varied between 0.5 gpm and 15.0 gpm while the flow through FCV-2210X is varied to give a total flow out of the blending tee of 132 gallons per minute.

In each of the three studies, the temperature of the boric acid makeup tank and the temperature of the demineralized water supply was assumed to be 70 degrees. The results are shown in Table 3-6 through Table 3-8. The final concentration out of the blending tee in each of these tables was obtained using the following equation: CEN-353(F), Rev. 03 Page 89 of 118

(F ~ C ) C out- y (100) (1748.34). (Fy'. C ) + (F out . Dw ) out of the blending In this equation, C out is the concentration coming tee in ppm boron, F is the flowrate coming out of CH-0210Y in gallons y per minute, C is the concentration of the boric acid makeup tanks in ibm per gallon, F out is the total flow coming out of the blending tee in gallons per minute, Dw is the density of water at 70 degrees in ibm per gallon, and 1748.34 is the conversion factor between concentration expressed in terms of weight percent boric acid and concentration expressed in terms of ppm boron. (See Appendix 4 for a derivation of this conversion factor). The data contained in Tables 3-6, 3-7, and 3-8 is plotted in Figure 3-3 through Figure 3-5. Note that following the reduction in BAMT concentration, a full range of flowrates and boron concentrations are available for blended makeup operations. 3.5 SHUTDOWN TO REFUELING - MODES 6 The plant shutdown to the refueling is typically the most limiting evolution that an operator must perform with respect to system boration, i.e., this evolution normally requires the maximum amount of boron to be added to the reactor coolant system. A shutdown to refueling normally occurs at the end of core cycle when the critical- boron concentration is low and requires an increase to the refueling boron concentration. In the most limiting case, boron concentration must be raised from zero ppm to the present refueling concentration of 1720 ppm. This section presents the evaluation results of a plant shutdown to refueling. The evaluation was performed specifically to demonstrate the effect on makeup inventory requirements of a reduction in boric acid storage tank concentration. A list of key parameters and conditions assumed in the analysis is contained in Table 3-9. The evaluation was performed for end-of-cycle conditions in order to maximize the amount of CEN-353(F), Rev. 03 Page 90 of 118

boron that must be added to the reactor coolant system. As a result, the boron concentration within the RCS was required to be increased from zero ppm to the present refueling concentration of 1720 ppm. The shutdown for refueling was assumed to take place as follows:

1. The reactor is shutdown via rod insertion to hot zero power conditions.

2. Following shutdown, at time zero, operators commence system feed-and-bleeds for both plants using three charging pumps and the boric acid makeup tanks. (BAMT concentration is assumed to be 3.5 weight percent boric acid).

3. The feed-and-bleeds are conducted for 40 minutes, after which time they are secured.

4, A plant cooldown and depressurization is commenced from an average coolant temperature and system pressure of 532 degrees and 2250 psia to an average coolant temperature and system pressure of 325 degrees and 268 psia. An overall cooldown rate of approximately 100 degrees per hour is assumed. Makeup inventory is supplied from the boric acid makeup tanks.

5. The shutdown cooling system is placed in operation at 325 degrees and 268 psia. (Prior to initiation, the concentration within the SDCS is assumed to be equal to the concentration in the reactor coolant system).

6. The plant cooldowns are continued following shutdown cooling initiation from 325 degrees to 135 degrees at 268 psia. A rate of 100 degrees per hour is assumed between 325 degrees to 175 degrees, a rate of 75 degrees per hour is used between 175 degrees and 156 degrees, and 50 degrees per hour is used between 156 degrees and 135 CEN-353(F), Rev. 03 Page 91 of 118

degrees. Makeup inventory is supplied from the boric acid makeup tanks. Evaluation results showing the system concentrations as a function of time and total boric acid makeup tank inventory requirements are contained in Table 3-10. Loop average temperature and system boron concentration data from this table is plotted in Figure 3-6. Concentrations during the initial feed-and-bleed'operations were calculated using the methodology discussed in Section 3.3 above. Concentrations during the subsequent plant cooldown were calculated in the same manner as the concentrations for the plant cooldowns in Section 2.4. Note that the boron content of the RCS was raised from zero ppm at the start of the evaluation to greater than 1720 ppm by the time the plants had been cooled and depressurized to 135 degrees and 268 psia. A total volume of 23,440.1 gallons of a 3.5 weight percent boric acid solution were required. Of this volume, 5120 gallons were used during the initial forty minute plant feed-and-bleed operation, and 18,320.1 gallons were charged into the system to compensate for shrinkage during the cooldown process. As can be seen from the results in Table 3-10, the volume of a 3.5 weight percent boric acid solution that is required in. order to perform the shutdown to refueling is approximately 2.3 times, the capacity of one boric acid makeup tank. Note that this result is conservative or bounding, and therefore, represents the maximum volume that would be required to be available assuming a refueling concentration of 1720 ppm boron and a boric acid makeup tank concentration of 3.5 weight percent boric acid. Since there are only two boric acid makeup tanks in each plant, with the combined capacities of approximately 19,400 gallons, additional provisions or operator actions are required in order to place the plant in Mode 6. These provisions could include some combination of the following: CEN-353(F), Rev. 03 Page 92 of 118

N 1 The initial plant feed-and-bleed and some portion of the plant cooldown could be performed using the refueling water tank. This would decrease the amount of inventory needed from the boric acid makeup tanks.

2. Prior to conducting the evolution, both boric acid makeup tanks are full and available for use.

3. During the initial part of the evolution, charge from one boric acid makeup tank until depleted, then transfer to the second BAMT.

Concurrent with continued cooldown, replenish inventory in the first tank. These provisions, or operator actions, would need to be considered only once during core cycle just prior to conducting a shutdown for refueling. Note that they are relatively simple actions -that should be well within the current plant operating procedures'n addition, they can be planned for in advance so as to have no impact on maintenance activities or the plant refueling schedule. 3.6 SHUTDOWN TO COLD SHUTDOWN - MODE 5 As discussed in the previous Section, the shutdown to refueling is the most limiting evolution that an operator must perform with respect to system boration. This evolution~is normally performed once during a fuel cycle just prior to refueling. Situations (such as unscheduled plant maintenance, etc.) can occur during a fuel cycle, however, and require that an operator perform a plant shutdown to cold shutdown conditions. Although not limiting with respect to boration requirements, it is important for an operator to be able to perform such a shutdown quickly and efficiently. CEN-353(P), Rev.'3 Page 93 of 118

This section presents the evaluation results of a plant shutdown to cold shutdown. The analysis was performed specifically to demonstrate the effect on makeup inventory requirements of a reduction in boric acid storage tank concentration. A list of key parameters and conditions assumed in the analysis is contained in Table 3-11. In addition to the parameters in Table 3-11, the evaluation was performed for end-of-cycle conditions assuming a cold shutdown concentration of 800 ppm boron. As a result, boron concentration had to be increased from zero ppm to 800 ppm boron. The operator scenario employed in the shutdown to cold shutdown is as follows:

1. The reactor is shutdown to hot zero power conditions via rod insertion.

2. A plant cooldown and depressurization is immediately commenced from an average coolant temperature and system pressure of 532 degrees and 2200 psia to an average coolant temperature and system pressure of 325 degrees and 268 psia. An overall cooldown rate of approximately 100 degrees per hour is assumed. Makeup inventory is supplied from the boric acid makeup tanks.

3. The shutdown cooling system is placed in operation at 325 degrees and 268 psia.

4. The plant cooldown is continued following shutdown cooling initiation from 325 degrees to 135 degrees at 268 psia. Makeup inventory is supplied from the boric acid makeup tanks.

   'Evaluation results showing the system concentrations as a function of time and total boric acid makeup tank inventory requirements are contained in Table 3-12 and Table 3-13. Note that two cases were analyzed for comparison for each plant. In Case I the concentration within the shutdown cooling system was assumed to be equal to the CEN-353(F), Rev. 03                                       Page 94  of  118

concentration of the reactor coolant system at the time of shutdown cooling initiation. In Case II the concentration within the shutdown cooling system was assumed to be equal to the concentration of the refueling water tank at the time of shutdown cooling initiation. System boron concentration data from these two tables are plotted in Figure 3-7 and Figure 3-8. Concentrations during the plant cooldown were calculated using the methodology discussed in Section 2.4. During those"portions of the plant cooldown in which blended makeup was used, data was calculated using the methodology contained in Section 3.4. A total volume of 10,468.0 gallons of a 3.5 weight percent boric acid solution were required in order to perform the shutdown to cold shutdown for the case in which the concentration of the fluid within the shutdown cooling system was assumed to be equal to that of the reactor coolant system at the time of shutdown cooling initiation. In the case where the concentration within the shutdown cooling system was assumed to equal that of the refueling water tank at the time of shutdown cooling initiation, a total volume of 7471.3 gallons was required. Note that approximately 2996.7 gallons less of the boric acid makup tank inventories were required to be used in the Case II cooldown. Since the plant operating procedures require that the shutdown cooling system be operated via recirculation with the refueling water tank prior to

   ,initiation, the concentration within that system will normally be very near that of the RWT any time that the shutdown cooling system is placed in operation.

3.7 LONG TERM COOLING AND CONTAINMENT SUMP pH The impact of the Boric Acid Reduction Effort on post LOCA long term cooling and containment sump pH control h was reviewed. Each analysis is discussed qualitatively below. CEN-353(F), Rev. 03 Page 95 of 118

Performance of the Emergency Core Cooling System (ECCS) during extended periods of time following a loss-of-coolant accident (LOCA) was analyzed in the response to NRC Question 6.28 contained in the appendix to Chapter 6 of the St. Lucie Unit 1 FSAR. Long term residual heat removal is accomplished by continuous boil-off of fluid in the reactor vessel. As borated water is delivered to the core region via safety injection and virtually pure water escapes is steam, high levels of boric acid may accumulate in the reactor vessel. As an input to this analysis, boric acid makeup tank (BAMT) boron concentration was assumed to be 12 weight percent. This calculation conservatively bounds the maximum boric acid makeup tank boron concentration of 3.5 weight %. A detailed calculation will be performed by Florida Power and Light company to determine the effects of boric acid concentration reduction on the post LOCA sump P and containment spray P . This evaluation will 'be H H conducted to determine if the sodium hydroxide addition rate or total cpxantity injected by the containment spray system needs to be changed to H maintain the sump and containment spray within she P ranges specified in the St. Lucie Unit 1 FSAR. Two boundary cases are provided for this review and are listed below: Minimum BAMT Boric Acid 5400 gallons of 3.5 weight concentration acid solution '%oric Maximum BAMT Boric Acid 19,600 gallons of 3.5 weight 0 concentration boric acid solution CEN-353(F), Rev. 03 Page 96 of 118

Table 3-1 Key Plant Parameters and Conditions Assumed in Generating the Feed-and-Bleed Curves

a. Reactor coolant system volume 9,601 ft3

b. Reactor coolant system pressure - 2200 psia.

c. Reactor coolant system average temperature - 532 degrees.

d. Pressurizer volume - 460 ft3

e. Pressurizer is saturated.

f. Zero reactor coolant system Technical Specification leakage.

g. Boric acid makeup tank temperature - 70 degrees.

h. Complete and instantaneous mixing between the pressurizer and the reactor coolant system.

i. Constant pressurizer level maintained during the feed-and-bleed process.

j. Letdown flowrate from one charging pump - 40 gpm.

k. Letdown flowrate from two charging pumps 84 gpm.

CEN-353(F), Rev. 03 Page 97 of 118

Table 3-2 Feed-and-Bleed Using One Charging Pump from an initial RCS Concentration of 0 ppm Boron St. Lucie ¹1 RCS Boron Concentration (ppm boron) BAHT at BAHT at BAHT at BAHT at BAHT at BAHT at 0 u .75 ut X 3.00 ut 3. 10 12.0 30.4 33.4 36.5 39.5 42.5 20 23.8 60.6 66 ' 72.7 78. 7 84.8 30 35 ' 90.5 99.6 108.6 117.7 126'. 7 40 47.3 120.3 132.3 144.3 '156.3 168.4 50 59.0 149.8 164.8 179.8 194.8 209.7 60 70.5 179.2 197. 1 215.0 232.9 250.8 70 82.0 208.3 229. 1 250.0 270.8 291.6 80 93.4 237.2 261. 0 284.7 308.4 332. 1 90 104.7 266.0 292.6 319.2 345.7 372.3 100 115.9 294.5 323.9 353.4 382.8 412.3 110 127.0 322.8 355.1 387.4 419. 7 451.9 120 138. 1 351.0 386.1 421 ~ 2 456.3 491.3 CEH-353(F), Rev. 03 Page 98 of 117 0

Table 3-3 Feed-and-Bleed Using TMo Charging Pumps from an initial RCS Concentration of 0 ppm Boron St. Lucie ¹1 RCS Boron Concentration (ppm boron) BAHT at BAHT at BAHT at BAHT at BAHT at BAHT at

                                           .75 et X               .00 vt     X       3.25 wt    X   0  v    X 10              25.0       63.6              69.9                   76.3                82.6       89.0 20              49.7      126.2             138.8                  151 ~ 4             164. 0     176.7 30              73.9      187.9            206.7                  225.5                244.3      263;  1 40              97.9      248.7            273.6                  298.5                323.3      348.2 50             121.5      308.7            339.5                  370  ~ 4             401.3      432.1 60             144.7      367.8            404.5                  441  ~ 3             478.1      514.8 70             167.6      426.0            468.6                   511.1               553.7      596.3 80             190.2      483.3             531.7                  580.0               628.3      676.6 90             212.4      539.9             593.8                  647.8               701. 8     755.8 100            234.4      595.6             655.1                  714. 7             774. 2     833.7 110            256.0      650.5             715. 5                 780.5               845.6      910.6 120            277.2      704 '             775.0                  845.4               915.9      986.3 CEN-353(F), Rev. 03                                    Page 99   of 117

Table 3-4 Feed-and-Bleed Using One Charging Pumps from an initial RCS Concentration of 800 ppm Boron St. Lucie ¹1 RCS Boron Concentration (ppm boron) BAHT at BAHT at BAHT at BAHT at BAHT at BAHT at 0 M X .75 wt X 3.00 vt 3.25 Mt I 0 v X 10 SO6.4 824.9 827.8 830.9 833. 9 836.9 20 812.7 849.5 855.5 861.6 867 ' 873.7 30 819.0 873.9 883.0 892 ' 901.1 910'. 1 40 825.3 898.3 910.3 922.3 934 ' 946.4 50 831.6 922.4 937. 4 952.4 967.4 982.3 60 837.7 946.4 964.3 982.2 1000.1 1018.0 70 843.9 970.2 991.0 1011.9 1032.7 , 1053.5 80 85O.O 993.8 1017.6 1041.3 1065.0 1088.7 90 856.0 1017.3 1043.9 1070.5 1097.0 1123.6 100 862.0 1040.6 1070.0 1099.5 1128.9 1158.4 110 868.0 1063.7 1096.0 1128.3 1160.6 1192.8 120 873.9 1086.8 1121.9 1157. 0 1192.1 1227. 1 CEN-353(F), Rev. 03 Page 100 of 117

Table 3-5 Feed-and-Bleed Using TMo Charging Pumps from an initial RCS Concentration of 800 ppm Boron St. Lucie ¹1 RCS Boron Concentration (ppm boron) SANT at BAHT at BAHT at BAHT- at BAHT ~ t BAHT at

                ~~et          .50 wt    X       g 75   Mt X           3.00   Mt    X 3.25  Mt X 3.50  Mt X 10                813.4        852.0               858.3                864. 7       871.0      877.4 20                826.6        903.1               915.7                928.3          940.9      953.6 30                839.5        953.5               972. 3               991. 1      1009.9    1028. 7 40                852.4      1003.2              1028.1               1053.0          io77.e    1102.7 50                865.0       1052.2             1083.0               1113.9          1144.8    1175.6 60                877.4       1100.5             1137.2                1174.0         1210. 8    1247.5 70                889.6       1148. 0            1190.6                1233.1         1275.8     1318.3 eo                901.7       1194.8             1243.2                1291. 5      1339.8     138e.i 90                913.6       1241.1             1295.0                1349.0         1403.0     1457.0 100               925.4       1286.6             1346. 1              1405  '        1465.3     1524.7 110               936.9       1331.4             1396.4                1461.4         1526.5     1591.5 120               948.2       1375. 6             1446.0               1516. 5      1586.9     1657. 3 CEN-353(F), Rev. 03                                       Page   101  of 117

Table 3-6 Typical Blended Hakeup Operations at 44 gpm out of Blending Tee Concentration Out of Tee (ppm boron) Floe (gpm) BAHT at BAHT at BAHT at BAHT at BAHT at

                ~~OX        0 v    X            5  Mt    X        3.00   Mt X           ~0~

0.5 43.5 50.9 56.2 61.4 66.7 72.0 1.0 43.0 101.8 112 ' 122 ' 133.4 144.0 1.5 42.5 152.7 168.4 184.1 200.0 215.9 2.0 42.0 203.5 224.4 245 ' 266 ' 287.8 3.0 41.0 305 ~ 1 336.4 367.9 399.5 431.3 4.0 40.0 406.6 448.3 490 ' 532.3 574.6 5.0 39.0 507.9 560.0 612.3 664.9 717.6 6.0 38.0 609.2 671.6 734. 3 797.2 860.4 7.0 37. 0 $ 10.3 783.0 es6.0 929.4 1003.0 e.o 36.0 811.3 894.3 977 ' 1061.3 1145.4 9.0 35.0 912. 2 1005.4 1099.1 1193. 1 1287.5 10.0 34.0 1012.9 1116.4 1220.3 1324.7 1429.4 15.0 29.0 1515.0 1669 ' 1824.2 1979.5 2135.4 CEH-353(F), Rev. 03 Page 102 of 117

Table 3-7 Typical Blended Hakeup Operations at 88 gpm out of Blending Tee Concentration Out of Tee (ppm boron) FloM (gpm) BAHT at BAHT at BAHT at BAHT at BAHT at E2LH1LL EBLIS)f. 0 v X .00 vt X 5 Mt 0.5 87.5 25.5 28.1 30.7 33.4 36.0 1.0 87.0 50.9 56.2 61.4 66.7 72.0 1.5 86.5 76.4 84.2 92. 1 100.1 108.0 2.0 86.0 101.8 112.3 122.8 133.4 144.0 3.0 85.0 152.7 168.4 184 ~ 1 200.0 215.9 4.0 84.0 203.5 224.4 245.4 266.6 287.8 5.0 83.0 254.3 280.4 306.7 333.1 359.6 6.0 82.0 305.1 336.4 367.9 399.5 431.3 7.0 81.0 355.9 392.4 429.1 465.9 503.0 8.0 80.0 406.6 448.3 490.2 532.3 574.6 9.0 79.0 457.3 504.2 551.3 598.6 646.1

10. 0 78.0 507.9 560.0 612.3 66,4. 9 717.6 15.0 73.0 760.8 838.7 916. 9 995.4 1074 ~ 2 CEN-353(F), Rev. 03 Page 103 of 117

Table 3-8 Typical Blended Hakeup Operations at 132 gpm out of Blending Tee Concentration Out of Tee (ppm boron) Flow (gpm) BAHT at BAHT at BAHT at BAHT at BAHT at E2UZJRX, QMX192L 0 Mt X g.75 vt X 3.00 Mt X 0 v X 0.5 131.5 17.0 18 ' 20.5 22.2 24.0 1.0 131.0 34.0 37.4 41.0 44.5 48 ' 2.0 130.0 67.9 74.9 81.9 88.9 96.0 3.0 129.0 101.8 112 ' 122.8 133.4 144.0 4.0 128.0 135.7 149.7 163 ' 177.8 191.9 5.0 127.0 169.6 187.1 204.6 222.2 239.9 6.0 126.0 203. 5 224.4 245.4 266.6 287.8 7.0 125.0 237.4 261.8 286.3 310.9 335.6 8.0 124.0 271.3 299.1 327.1 355 ' 383.5 9.0 123 ' 305.1 336.4 367.9 399.5 431.3 10.0 122.0 339.0 373.7 408.6 443.8 479. 1 15.0 117.0 507.9 560.0 612.3 664.9 717.6 CEH-353(F), Rev. 03 Page 104 of 117

Table 3-9 Key Plant Parameters and Conditions Assumed in the Shutdown to Refueling Evaluation 9,601 ft 3 Reactor coolant system volume

b. Initial RCS average loop temperature - 532 degrees.

c. Pressurizer volume - 460 ft3

d. Pressurizer is saturated.

e. Zero reactor coolant system leakage,

f. Boric acid makeup tank temperature - 70 degrees.

g. Complete and instantaneous mixing between the pressurizer and the reactor coolant system.

h. Constant pressurizer level maintained during the feed-and-bleed process'.

Initial RCS concentration 0 ppm boron. BAMT concentration - 3.50 weight percent boric acid. A

k. RWT concentration 1720 ppm boron.

1. Shutdown cooling system volume 3000 ft3

m. Boron concentration in the shutdown cooling system is equal to the boron concentration in the RCS at the time of shutdown cooling initiation.

n. Refueling concentration, Mode 6 - 1720 ppm.

CEN-353(F), Rev. 03 Page 105 of 118

Table 3-10 Evaluation Results for Plant Shutdown to,Refueling Temp Pressure Concentration Total BAMT de rees sia m boron Volume al 532 2200 0 0 532. 2200 135.1 1,280 532 2200 267.2 2,560 532 2200 396.3 3,840 532* 2200 522.7 5,120 500 2200 724 ' ',193.5 450 2200 975.6 10,007.1 400 2200 1173.5 12,424.1 350 2200 1336.7 14,567.4 325¹ 268 1350 15,865.9 325 268 1350 15,865.9 300 268 1418.3 17,116.1 250 268 1538.9 19,413.7 200 268 1638.1 21,396.1 150 268 1715.8 23,012.7 135 268 1736.0 23,440.1

Initial 40 minute feed-and-bleed complete.

¹ Cooldown stopped for one hour for shutdown cooling system alignment. CEN-353(F), Rev. 03 Page 106 of 118

Table 3-11 Key Plant Parameters and Conditions Assumed in the Shutdown to Cold Shutdown Evaluation

a. Reactor coolant system volume - 9,601 ft3,.

b. Initial RCS average loop temperature 532 degrees.

c. Pressurizer volume 460 ft3

d. Pressurizer is saturated.

e. Zero reactor coolant system leakage.

f. Boric acid makeup tank temperature - 70 degrees.

g. Demineralized water supply temperature - 70 degrees.

h. Complete and instantaneous mixing between the pressurizer and the reactor coolant system.

Constant "pressurizer level maintained during the plant cooldown. Initial RCS concentration 0 ppm boron. BAMT concentration 3.50 weight percent boric acid. RWT concentration - 1720 ppm boron.

m. cooling system volume 3000 ft 3.'hutdown

n. Boron concentration in the shutdown cooling system is equal to the boron concentration in the RCS at the time of shutdown cooling initiation for Case I.

0 Boron concentration in the shutdown cooling system is equal to the boron concentration in the RWT at the time of shutdown cooling initiation for Case II. CEN-353(F), Rev. 03 Page 107 of 118

Table 3- 12 Case I Evaluation Results for Plant Shutdown to Cold Shutdown with SDCS Concentration Equal to RCS Concentration at the Time of Shutdown Cooling Initiation Temp Blending Pressure Concentration Total BAMT de rees Ratio

sia m boron Volume al 532 2200 0 0 500 2200 221.0 2,073.5 450 2200 496.6 4,887.1 400 2200 713.5 7,304.1 350 0.85:1 2200 799.8 8,462.7 325 1.51:1 268 .800. 0 9,508.1 325¹ 268 800.0 9,508.1 300 6.9 :1 268 800.0 9,666.3 250 6,89:1 268 800.0 9,957.5 200 6.89:1 268 800.0 10,208.8 150 6.89:1 268 800.0 10,413.7 135 6.87:1 268 800.0 10,468.0
Ratio of pure water to BAMT water at blending tee.

¹ After shutdown cooling system alignment. CEN-353(F), Rev. 03 Page 108 of 118

Table 3-13 Case II Evaluation Results for Plant Shutdown to Cold Shutdown with SDCS Concentration Equal to RVZ Concentration at the Time of Shutdown Cooling Initiation Temp Blending Pressure Concentration Total BAMT de rees Ratio

sia m boron Volume al 532 2200 0 0 500 2200 221.0 2,073..5 450 2200 496.6 4,887.1 400 4.24:1 2200 523.0 5,348.3 350 11.1:1 2200 523.0 5,525.5 325 2.88:1 268 523.1 6,511.8 325¹ 268 800.0 6,511.8 300 6.9 :1 268 800.0 6,670.0 250 6.9 :1 268 800.0 6,960.8 200 6.89:1 268 800.0 7,212.1 150 6.89:1 268 800.0 7,417.0 135 6.87:1 268 800.0 7,471.3
Ratio of pure water to BAMT water at blending tee.

¹ After shutdown cooling system is aligned and circulated. CEN-353(F), Rev. 03 Page 109 of 118

n I 4J Vl FIGURE 3 1 ST.LUCIE 1 FEED ANDBLEED FROM HOT ZERO POWER FROM 0 PPM BORON O.S 0.8 X 0 K 0 0.7 E L 0.6

   ~ h0 Z ca 0  h   0.5 td OA U

Z 0 0.3 U N O U 0 0.2 0.1 20 40 60 100 120 TlME (minutes) Q 40-1 20 + 40-3.0 0 80-3.0 80-3.5 gpm-wt. gpm-wt.X gpm-wt.X

O p) I ANDBLEED M FIGURE 3 2 FEED IJl ST.LUCIE 1 FROM HOT ZERO POWER FROM 800 PPLl BORON 1.7 1.6 zp IL' E

   ~N Z  C p  0 n
    +

1.2 0 z 0 r N 0 0 0.9 0.8 20 60 80 100 120 TIME (minutes) n 40-1720 + 40-3.0 O 80-3.0 80-3.5 gpm-ppm gpm-wt.X gpm-wt.X gpm-wt.X

I 4J FIGURE 3 3 BLENDED MAKEUP OPERATIONS Vl 4J AT 44 GPM OUT OF BLENDING TEE 1.5 1.3 1.2 E 0.9 Ov Z D 0.8 0.7 0.6 bJ 0 0.5 Z 0 e 0 OA 0.3 0.2 0.1

4. 6 FLOW AT FCV-2210Y (gpm)

                         +     BA     AT 3.0 wt.X     0 BAMT AT 3.5 wt.

FIGURE 3 4 BLENDED MAKEUP OPERATIONS AT 88 GPM OUT OF BLENDING 'tEE 800 700 SOO E 15 500 z 0 F bJ 300 Pg 0 00 p 200 0 100 10 FLOVf AT FCY-221 OY (gpm) Q BAMT AT 2.5 gt.g + BAMT AT 3.0 qi.C 0 BAMT AT 3 5 wt.g

O W aI FIGURE 3 5 BLENDED MAKELIP OPERATIONS IA Lh AT 132 GPM OUT OF BLENDING TEE 500 E 300 p F 200 Id z0 p (g 0 100

4. 6 10 FLOW AT FCV-2210Y (gpm)

                        +    BA    AT 30 wt.g        O BAMT AT 3 5 wt.'A

FIGURE 3 6 ST.LUCIE 1 RCS BORON CONC vs TEMP FOR REFUELING SHUTDOWN 1.8 1.7 1.6 1.5 Z 0 K 1.3 0 Gl 1.2 E + C 0 D 0.9 0.8 0.7 0.6 0 0 0.5 0 0;4 0.3 0.2 0.1 0 550 450 350 250 150 TEMPERATURE (r)

nW I Vl FIGURE 3 7 ST.LUCIE 1 RCS BORON CONC vs TEMP FOR REFUELING SHUTOOWN 900 800 z0 700 IL 0 600 E z0 500 z u z0 300 0 u 200 K 100 550 450 350 . 250 150 TEMPERATURE (F)

FIGURE 3 8 ST.LUCIE 1 RCS BORON CONC vs TEMP FOR REFUELING SHUTDOWN 900 800 700 600 500 400 300 200 100 550 450 350 250 $ 50 TEMPERATURE (F)

4. 0 R~EggEQQPS 4.1 Technical Data Sheet IC-ll, US Borax 6 Chemical Corporation, 3-83-J.W.

4.2 Combustion Engineering's Emergency Procedure Guidelines, ~CE Revision 2, May, 1984. 4.3 An Evaluation on the Natural Circulation Cooldown Test Performed at the San Onofre Nuclear Generating Station, compliance with the Testing Requirements of Branch Technical Position RBB 5-1, ~CEN- 59, Combustion Engineering, January 1984 U.S. Nuclear Regulatory Commission Standard Review Plan NUREG-0800

                              '.4 Section 5.4.7. "Residual Heat Removal (RHR) System" and Branch Technical Position (RSB) 5-1 "Design Requirements of the Residual Heat Removal System".

CEN-353(F), Rev. 03 Page 118 of 118

Appendix 1 Derivation of the Reactor Coolant System Feed-and-Bleed Equation ur ose of De in tions This appendix presents the detailed derivation of an equation which can be used to compute the reactor coolant system (RCS) boron concentration change during a feed-and-bleed operation. For this derivation, the following definitions were used: m in - mass flowrate into the RCS m out

                  - mass  flowrate out of the RCS m        boron mass flowrate w     - water   mass flowrate m    ~  - boron   mass m

w water mass C in - boron concentration going into RCS C - out boron concentration going out of RCS C 0 initial boron concentration C(t) - boron concentration as a function of time CRCS

                  << RCS boron concentration Sim lif in     Assum   tions During a feed-and-bleed operation, the reactor coolant system can be pictured as shown in the figure as a closed container having a certain volume, a certain mass, and an initial boron concentration.

Coolant is added at one end via the charging pumps. The rate of addition is dependent on the number of emerging pumps that are running with the lof5 CEN-353(F), Rev. 03

                                                                                Ã concentration being determined by the operator. Coolant is removed at the other end via letdown at a rate that is approximately equal to the charging rate and at a concentration determined by fluid mixing within the reactor coolant system. The mass flowrate into the reactor coolant system is given by the following equation:

For typical boron concentrations within the chemical and volume control system, mw is very much greater than m . (For example, a 3.5 weight percent boric acid solution contains only 0.04 ibm of boric acid per ibm of water). Therefore the above equation can be simplified to the following: (. (1.0) in -(m m

w in In a similar manner, the mass flowrate coming out of the reactor coolant system, given by out b

                                  '    w out'an be simplified  by again     realizing that        m
                                                        'w.

is very much greater than m or m out - (m w out'2.0) For a feed-and-bleed operation with a constant pressurizer level and a constant system temperature, the mass flowrate into the RCS will be equal to the mass flowrate out of the RCS, or m in m out (m w) in (m w) out (3.0) 2 of 5 CEN-353(F), Rev. 03

Finally, if it is assumed that the boron which is added to the reactor coolant system mixes completely and instantly with the entire RCS mass, the concentration of the fluid coming out of the system will be equal to the system concentration, or C C (4.0) out RCS Derivation The rate of change of boron mass within the reactor coolant system is equal to the mass of boron being charged into the system minus the mass of boron leaving via letdown. In equation form, this becomes d( b ) RCS - inC in-m'out out' dt From Equation 3.0, b RCS 'i in ou)>> ' in i o t (5.0) dt The concentration of boron in the reactor coolant system, i.e,. the weight fraction of boron, is defined as follows: C RCS b w RCS Since m P)m RCS-w KCS 3 of 5 CEN-353(F), Rev. 03

Where (mw ) is a constant for a constant system temperature. The rate of change of the RCS concentration is therefore b RCS dCRGS dt (6.0) les Substituting Equation 5.0 into Equation 6.0 yields the following: RCS w in in out dt w RCS and from Equation 4.0, (7.0) dt w RCS Solving Equation 7.0 for concentration yields: (m ) RCS w in RCS w RCS or C(t) dCRGS ( w) in dt . in RCS w RCS C 0 0 Integrating from some initial concentration C 0 to some final concentration ll C(t) and multiplying through by a minus one gives the following: C(t) ln (CRCS CIN) (m ) w in 4 RCS C or 4of5 CEN-353(F), Rev. 03

ln 'in in t C - C o in w RCS Continuing to solve for C(t), this equation becomes: e

                                     -(mw ) in  t/  (m )

w RCS o in or

                               + (C - C. ) e 4 in      RCS C(t)      C in         o    in If we define the time constant          T to  be as   follows:

T - ( w) RCS (m )in in (l C(t) C e + C - e ) 0 5of5 CEN-353(F), Rev. 03

Appendix 2 A Proof that Final System Concentration is Independent of System Volume Pu ose of Definitions This appendix presents a detailed proof that during a plant cooldown t where an operator is charging only as necessary to makeup for coolant contraction, the final system concentration that results using a given boration source concentration will be independent of the total system volume. For this proof, the following definitions were used: c i -- initial boron ini.tial boron concentration Plant 1 mass Plant 1 m bi m . wi

                 - initial water mass Plant 1 c

f final boron concentration Plant 1 c a boron concentration of makeup solution Plant 1 m. ba

                 - mass of boron added Plant 1 m

wa

                 - mass of water added Plant 1 m

bf final boron mass Plant 1 C i initial boron concentration Plant 2 1 initial boron mass Plant 2 M wi ini.tial water mass Plant 2 C f - final boron concentration Plant 2 C a boron concentration of makeup solution Plant 2 a

                 - mass of boron added Plant 2 M

wa

                 - mass of water added Plant 2 Proof For  this proof, consider     two plants  at the same initial temperature, the same  initial pressure,     and the same  initial boron concentration. One plant, Plant 2, has exactly twice the system volume as the other plant, lof4 CEN-353(F), Rev. 03

Plant 1. Initially, boron concentration Plant 1 - boron concentration Plant 2, or i -C.i bi m c (1. 0) bi 'wi bi Since the volume of Plant 2 is twice that of Plant 1, Mwi. 2m i. Substituting this relationship Equation 1.0 and solving yields the wi'nto following: bi

m. +m M. + 2mi bi"bi + 2 b' i bi"bi 'i"bi and (2.0)

Therefore, the initial boron mass in Plant 2 is exactly twice the initial boron mass in Plant 1. During the cooldown process for Plant 1, the final boron mass in the system will equal the initial .boron mass plus the added boron, mass, or bf 'bi'ba b (3.0) If, during this cooldown process, operators charge only as necessary to makeup for coolant contraction, water and boron will be added only as space is made available in the system due to coolant shrinkage. The final boron concentration from Equation 3.0 can therefore be expressed as follows: m i+m +m i+m bf bi'ba'wi + wa 2of4 CEN-353(F), Rev. 03

If concentration is expressed in terms of weight percent, this last equation becomes bf

                         - bi 'ba 'wt 'wa                                      (4.0)

Similarly, the remaining two components of Equation 3.0 become bi t bi wi] (5.0) and ba f ba wa] a Substituting Equations 4.0, 5.0, and 6.0 into Equation 3.0 and (6-0) solving for the final concentration yields the following: (7.0) bi ba

                                               'wi'wa For Plant 2, Equation 7.0 becomes (8.0)

M i + M + M + M During a cooldown, the shrinkage mass, i.e., the mass of 'fluid that must be added to the system in order to keep pressurizer level constant, is calculated by dividing the system volume by the change in specific volume, or m System Volume Plant 1 (9.0) wa g Specific volume and

                    'M wa-   System Volume Plant 2                              (10.0) g Specific volume where System Volume Plant 1        (1/2)   System Volume   Plant 2.

3of4 CEN-353(F), Rev. 03

I For a given cooldown, dividing Equation 9.0 by Equation 10.0 gives the following: M wa

                            -2mwa                                         (11.0)

In addition, if the charging source for both plants is at the same concentration and temperature, C a

                           - c a                                          (12.0) and (13.0)

Substituting Equations 2.0, 11.0, 12,0, and 13.0 into Equation 8.0 yields the following: C, 2~,+~,~C + 2~ +2m ]c

                                     +2mb +M     i+2m Since the  initial concentrations      are the same, Ci    ci,   and since  Plant 2 is twice  as  large as Plant 1,     M i

wi 2m i, wi' f 2m,i + 2mi c + 2g + 2m c cf 2mi + 2m + 2mi + 2m Cf cf (14.0) Therefore, for a cooldown where pressurizer level is maintained constant, the final boron concentration for Plant 2 is equal to the final boron concentration for Plant 1, i.e., the change in boron concentration is independent of the exact system volume. 4of4 CEN-353(F), Rev. 03

Appendix 3 Methodology for Calculating Dissolved Boric Acid per Gallon of Water ~Pur ose The purpose of this appendix is to show the methodology used to calculate the mass of boric acid dissolved in each gallon of water for solutions of various boric acid concentrations. Two solution temperatures were used corresponding to the minimum allowable refueling water tank temperature of 50 degrees and a boric acid makeup temperature of 70 degrees in the absence of tank heaters. Methodolo and Results Boric acid concentration expressed in terms of weight percent is defined as follows: mass of boric acid x total solution mass or mass of boric acid x 100. C (1 0) (mass of boric acid) + (mass of water) If we define m. Da to be the mass of boric acid and m w to be the raass of water, and if we substitute these defined terms into Equation 1.0 and solve for the mass of boric acid we have the following: ba x 100 ra + m or Cxmw ra ba 100 - C lof2 CEN-353(F), Rev. 03

From Appendix A of the Crane Company Manual (Flow of Fluids Through Valves, Fittings, and Pipe, Crane Co., 1981, Technical Paper No. 410), the density of water at 70 degrees is 8.3290 ibm / gallon and at 50 degrees is 8.343 ibm / gallon. Using these water masses and Equation 2.0 above, the mass of boric acid per gallon of solution is as follows: Mass of acid per gallon Concentration of solution at source wt bo ic acid m boron 50 de rees 70 de rees 0.98379 1720 0.08289 ibm 1.05815 1850 0.08923 ibm 1.14394 2000 0.09654 ibm 1.22974 2150 0,10387 ibm 1.31553 2300 0.11121 ibm BAMT 2.25 3934 0.19172 ibm BAMT 2.50 4371 0.21356 ibm 2.75 4808 0.23552 ibm 3.00 5245 0.25760 ibm BAMT 3.25 5682 0.27979 ibm 3.50 6119 0.30209 ibm 2of2 CEN-353(F), Rev. 03

Appendix 4 Methodology for Calculating the Conversion Factor Between Weight Percent Boric Acid and ppm Boron ~u)ose The purpose of this appendix is to show the methodology used to derive the conversion factor between concentration in terms of weight percent boric acid and concentration in terms of parts per million (ppm) of naturally occurring boron. esu ts For any species (solute) dissolved in some solvent, a solution having a concentration of exactly 1 ppm can be obtained by dissolving 1 ibm of solute in 999,999 ibm of solvent. An aqueous solution having a concentration of 1 ppm boric acid, therefore, can be obtained by dissolving 1 ibm of boric acid in 999,999 ibm of water, or 1 ppm 1 ibm boric acid 1 ibm boric acid 6 1 ibm boric acid + 999,999 ibm water 10 ibm solution For any species (solute) dissolved in some solvent, a solution having a concentration of 1 weight percent (wt. 0) can be obtained by dissolving 1 ibm of solute in 99 ibm of solvent. An aqueous solution having a concentration of 1 wt. 0 boric acid, therefore, can be obtained by dissolving 1 ibm of boric acid in 99 ibm of water, or 1 wt. ibm boric acid 1 ibm boric acid 100 ' 1 ibm boric acid + 99 ibm water 100 ibm solution 4 Dividing these last two equations yields a ratio of 10, or 1 wt. 8 boric acid 10,000 ppm boric acid. (1.0) lof 2 CEN-353(F), Rev. 03

To convert from ppm boric acid (weight fraction) to ppm boron (weight fraction), multiply Equation 1.0 by the ratio of the molecular weight of boric acid (naturally occurring H3B03) to the atomic weight of naturally occurring boron. From the Handbook of Chemistry and Physics, CRC Press, 1 wt. 0 boric acid - (10,000) 'pm boron 10.81 61.83 1 wt. 8 boric acid - 1748.34 ppm boron. CEN-353(F), Rev. 03'of2

Appendix 5 Bounding Physics Data Inputs For Revision 3 of this report, updated reactor physics data was used as submitted by Florida Power and Light, (pages 17 through 24 of this appendix). This new data provided the basis for the reduced Boric Acid inventory requirements. Where applicable, the new physics data was used in place of data contained in pages 1 through 16 of this appendix. The following Physics Data Inputs for St. Lucie Unit 1 are provided to facilitate review of this effort. The conservatisms, uncertainties, and biases incorporated in the BAHT Boric Acid Concentration Reduction effort for St. Lucie Unit 1 are contained in Table 1. The St. Lucie Unit 1 EOC Physics Data Inputs are contained in Table 2 and Figures 1 through 8. During future cycles, the new core parameters must be compared with these inputs to ensure that they are still bounding. The purpose of this section is to describe the methodology used to compute the core reactivity during the cooldown. This method has been devised to conservatively bound the reactivity affects of the natural circulation cooldown described in Section 2.2.1.1 of this report. The cooldown scenario and the method used to compute core reactivity are discussed in detail in the following paragraphs. A description of the core reactivity affects is provided. In addition a brief description is provided to show that these assumptions conservatively bound all similar cooldowns at any time during the fuel cycle.

1. Conservative core physics parameters were used to determine the required boron concentration and the required Boric Acid Makeup Tank volumes to be added during plant cooldown.

lof 24 CEN-353 (F), Rev. 03

End-of-cycle (EOC) initial boron concentration is assumed to be zero. End-of-cycle moderator cooldown effects are used to maximize the reactivity changes during plant cooldown. Positive reactivity is added to the core as the moderator temperature is lowered during the cooldown. The moderator temperature effects on core reactivity vary over the fuel cycle. The moderator temperature effect at beginning-of-cycle (BOC) is very small while the moderator temperature effect EOC provides the maximum reactivity insertion. Figure 1 of this appendix was used. End-of-cycle (EOC) inverse boron worth data was used in combination with EOC reactivity insertion rates normalized to the most negative Technical Specification Moderator Temperature Coefficient (MTC) limit since it was known that this yields results that are more limiting than the combination of actual MTC and actual IBW values at all periods through fuel cycle prior to end-of-cycle. 'he

2. Scram Worth A conservative scram worth was used in this calculation. The available scram worth was computed utilizing the hot zero power scram worth for all rods in minus the worst rod stuck full out (Table 2). From this value the Power Dependent Insertion Limit worths (Table 2) were subtracted to obtain a net available scram worth. A combined Bias and Uncertainty of 10% was subtracted from the available scram worth for added conservatism.

This scram worth is further reduced by subtracting an EOC reactivity value associated with t'e Full Power Defect (from Figure 7). 2of 24 CEN-353 (F), Rev. 03

3. Determination of Excess Scram Worth Excess scram worth was determined by comparing, the available scram worth at zero power and subtracting the required technical specification shutdown m'argin. Required Shutdown Margin:

T SDM ave

        > 200'F        > 3.6s    k/k
        < 200'F        > 2.0a    k/k It was  determined by  this  method  that there  was a 0.04   k/k excess scram worth available for temperatures above 200      F and an excess  scram worth  of 1.64 k/k for temperatures below 200'F.

4. Core Reactivity Effects 1

A reactivity calculation has been performed to account for positive reactivity insertion due to the decay of xenon and the positive reactivity due to the cooldown of the moderator and fuel. Uncertainties and biases were applied to all reactivity affects. Table 1 delineates the biases and uncertainties used in this calculation. Xenon Reactivity Effects As shown in Figure 4 of the xenon worth peaks at its most negative reactivity worth around eight hours after the reactor is shutdown. Xenon decay reduces the negative reactivity of the xenon back to its steady state operating value at approximately 26 hours after shutdown. At times after 26 hours the plant must be borated to compensate for the further reduction in xenon concentration. As an added conservatism this calculation never credited the extra negative reactivity inserted by the 3 of 24 CEN-353(F), Rev. 03

xenon peak that occurs after shutdown. Instead the plant was maintained at hot standby for 26 hours to allow xenon to return to the 100% steady state value and further xenon decay to add reactivity simultaneously with the plant cooldown effects. Figure 3 was used to determine the positive reactivity inserted into the core for times after 26 hours at discreet time intervals. Note that a slow cooldown rate will prolong the time required to reach Mode 5 where the shutdown margin drops from 3.6 k/k to 2.0 k/k and therefore would require a larger boron concentration to counteract xenon decay during the cooldown. A 12.5 degree per hour cooldown rate has been utilized in this calculation. It should be noted that this method accounts for xenon decay for a full 54 hours which is a much longer time frame than is expected to achieve cold shutdown. Reactor Cooldown Effects The affect of the reactor cooldown was calculated by determining the fuel temperature and moderator temperature reactivity effects for each incremental temperature decrease. Figures 1 and 2 were utilized to determine these effects. It should be noted that these reactivity effects are independent of time and solely dependent on the change in temperature of the core. Boration Requirements Having determined the reactivity effects due to xenon, moderator cooldown and fuel temperature cooldown for discreet time intervals after the plant is shutdown, the necessary boron concentration to compensate for this reactivity change is determined. The Inverse Boron Worth values of Table 3 were used to determine the ppm boron necessary in the RCS to compensate for the positive reactivities determined above. All the conservatisms, uncertainties and biases applied to this calculation are included in Table 1. 4 of 24' CEN-353(F), Rev. 03

Table 1 Conservatisms, Uncertainties and Biases Incorporated in the BAMT Boric Acid Concentration Reduction Effort for St. Lucie Unit 1

1. The initial scram is assumed to proceed from the hot full power PDIL (power dependent insertion limit) to the all rods in, with the worst case rod stuck in the full out position conditions.

2. A bias and uncertainty of -10% was applied to the scram worth data.

3. A conservative correction was applied to the St. Lucie Unit 1 moderator cooldown data to adjust the cooldown curve to the Technical Specification MTC of -2.8 x 10 delta-rho/'F.

4. A combined bias and uncertainty of 10% was applied to the moderator data for Unit 2 and to the corrected moderator data.

5. A bias of 15$ and an uncertainty of 15$ was applied to the Doppler, data.

6. The assumption that the cooldown begins at 26 hours is conservative in relation to the buildup and decay of Xenon. 4 5 of 24 CEN-353(P), Rev. 03

Table 2 St. Lucie Unit 1 EOC Physics Data* Required Shutdown Margin: Tavg SDM

                   > 200'F                        > 3.6   a    k/k

( 200'F > 2.0 a k/k 2~ The moderator cooldown curve from HFP to 68'F with all rods out is presented in Figure 1. The moderator reactivity is given here ap a function of the normalized water density for a MTC of -2.5 X 10 delta-rho/ F. CE will apply a conservative correction to the moderator cooldown curve to make it in agreement4with the most negative technical specification MTC of -2.8X10 delta-rho/'F.

3. The Doppler Curve is shown in Figure 2.

4. Xenon Worth versus time after shutdown from 100% power is shown in Figures 3 and 4 for cycles 6 and 7, respectively.

5. Scram Worths for the ARI/WRSO condition:

HZP 7214 pcm HFP 8280 pcm 6.& 7. HZP and CZP Differential Boron Worths are shown in Figures 5 and 6 for cycles 6 and 17, respectively.

8. Power Defects for ARO conditions for cycles 6 and 7 are shown in Figures 7 and 8, respectively.

The value of B-eff used in the moderation cooldown reactivity curve is 0.0049.

10. Power Dependent Insertion Limit PDIL) worths in pcm for St. Lucie Unit l.

PDIL Position EOO 6 EOC HZP Gr. 6 Q 55" 1426 1288 HFP Gr. 7 Q 103" 167 200 The value of B-eff used in the Doppler curve is 0.0049.

12. The combined bias and uncertainty for scram worths is -10%.

Items ll and conversations. 12 were transmitted to CE informally through telephone 6 of 24 CEN-353(F), Rev. 03

Table 3 Inverse Boron Worth TEMP IBW 557.0 85.5 544.5 85. 5 532.0 85.5 507.0 84.3 482.0 83.1 457.0 81.7 432.0 80.3 407.0 79.0 382.0 77.7 357.0 76.5 332.0 75.4 307.0 74.4 282.0 73.5 257.0 72.8 232.0 72.1 219.5 71.8 207.0 71. 5 200.0 71.4 200.0 71.4 200.0 71.4 130.0 70.2 7 of 24 CEN-353(F), Rev. 03

Table 4 Required Boron Concentration for a Cooldown from 557'F to 135'F Temperatures Concentration (Degrees F) (ppm boron) 557 -56 510 96 490 161 480 192 470 220 460 249 450 275 440 300 430 325 420 347 410 369 400 390 390 409 380 429 370 446 360 464 350 480 340 496 330 511 325 518 310 539 300 552 260 601 235 630 210 657 200 667 199.9* 564 199. 9~ 595 190 604 180 613 170 622 160 631 150 640 140 649 135 654

After shutdown margin change from 3.6$ delta k/k to 2.0% delta k/k

~ The boration requirement for a 2.08 shutdown margin and core is xenon free 8 of 24 CEN-3S3(F), Rev. 03

g 5 W AtQ O.QS I 00 I.05 I-IO I. I5 I 20 I 25 I.Rl I.35 I.49 NORHAL1 ZED HOOERATOR DENS)TY

0 ?M 4N ItN NN ION le f4$ le ISN 2$ Xl 2ROO FtKL TBFERhTQK. dog f Figure 2 Doppler Rewtlvlty vs. fuel Yeiiperature, Hodel 1, Np

I

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    ~ .0 0                  00                        200                          l00                    C00 lt4cralor leeycralwc                   (      f) f IIlvrc       5 51. Lvclc Usll              5  Cycle 4, ~ lggcreall ~ I lorna IhrllI vcrsvs IcIcSIcrclwc,          II,M lfhlI Nl-l, Oc Iceoa

14 0 1$ 4 412 0 if+4

           ~ lL4 LO o        1IN       ae        aa        m         Sa lle4e~     Teap~tare     ( R Figure   6   St. I.uc1e Un1t 1, CycIe 7, 011'ferent1a1 Soron Arts   versus Temperature, ARl-l, Ilo Xenon, 9,800 KFPH CEN-353(F), Rev.03                     14  of  24

8 O Jotal tcMer Qefect 0 - 10N ter FKDH is h tt ~ ~0 200 1,6I9 6,000 1,NI 12,075 2,353 wa 1200 O 0 0 50 Parer (X) figure I lucle Unit 1 Cycle 6 P~r Oct~xi

25 50 l5 Poeac 4X) f l gore 8 St. lucle $ >lt I, Cycle 7, Poser De(ect versus Percent Pomr

p.O. 8ox 14NO, Juno Beech, fL 334084l2D

       @PL ABB/Combustion Engineering,       Inc.

1000 Prospect Hill Road Windsor, Connecticut 06095 Attention: Hr. J. H. Westhoven ST. LUCIE UNIT 1 REDUCING THE BORATED WATER INVENTORY REQUIREMENTS REA SLN-85-094-13 FILE: REA SLN-85-094

Reference:

1) C-E letter F-CE-10870 dated 3/9/90

2) FPL letter JPE PSL-87-0954 dated 4/9/87

3) FPL memo FRN-88-599 dated 8/3/88 4 C-E letter F-CE-10143 dated 2/18/87

5) FPL memo NF-90-233 dated 5/25/90 Gentlemen:

In accordance with your request (Reference 1), FPL is providing QA verified physics input data to support the subject task. The FPL Nuclear Fuels discipline reviewed the physics data transmitted in References 2,3 and 4. They concluded that all but three parameters (Power Dependent Insertion Limit worth, Xenon worth and Differential Boron worth) remain valid; these parameters were revised in Reference 5 (attached). Nuclear Fuels has QA verified that the physics input data included in References 4 and 5 are now representative of the current fuel management strategy, i.e. 18 month fuel cycle. Please contact Joe LaDuca at (407) 694-3289 should you have any questions. Very truly yours,

T. E

                                                                  ~         oberts gngi     ering Project Hanager
                                                                             ~
  /

~ j JTL/sjd Attachment cc: D. A. Sager D. A. Culpepper (w/) R. D. Parks C. Larsen - C-E Juno Beach D. W. H. Stewart Higgins (w/) H. Jiminez 0 17 of 24 CEN-353(F), Rev. 03

Inter-Office Correspondence To: J. LaDuca - Nuclear Enginccring Date.'F-90-233 May 25, 1990 From: M. Jimcncz Dcpartmcnt: Nuclear Fuel

Subject:

St. Lucie Unit I Borated Mater Inventory Requirement Reduction REA SLN 85-094-13 Rcfcrcncc: 1. Lcttcr, J.M. Westhoven to l'.E. Roberts, "St. Lucie Unit 1 Borated Water Inventory Requirement Reduction," F-CE-10870, March 9, 1990.

2. FPL Interoffice Correspondence, M. Jimcncz to TJ. Vogan, "Revised Physics Data for PSL 1 BAMT Analysis," FRN 10870, August 3, 1988.

3. FPL Iwtter, T.J. Vogan to J.M. Wcsthoven, "St. Lucie Units 1 A, 2 Boric Acid Concentration Reduction," JPE-PSL-87-0954, April 9, 1987.

4. Letter, C.J. Gimbmnc to J.R. Hoffman, "BAMT Concentration Reduction Physics and Plant Data," F-CE-10143, February 18, 1987.

Thc intent of this letter is to provide the required QA verification requested in Reference 1. The Nuclear Fuel Section of JPN has reviewed the St. Lucie 1 physics input data provided in References 2, 3 and 4 and has concluded that it is representative of the last three cycles (Cycles 8, 9, and 10) except for the xenon worth after shutdown data. Revised xenon worth curves and minor changes to the differential boron worth and to the HZP PDII. data to better define their ranges are attached to this letter. This data supersedes the values for these parameters which were provided in the references. Our review revealed that the peak xenon worth in recent cycles is lower than originally transmitted in Reference 3 for Cycles 6 and 7. This is the result of the fuel vendor's improvements in methodology in recent cycles. Xenon worth after shutdown curves and corresponding tabular data for Cycles 9 and 10 are attached as Figures and Tables I and 2, respectively. Additionally, thc revised boron worth data provided in Reference 2 which consisted of only Cycle 8 results has been re-evaluated to include data from the two most recent cycles (Cycles 9 and 10). No significant variation was noted. This information is provided on Table 3 and it consists of best estimate calculated average values for differential boron worth covering the three fuel cycles. A minor revision to the HZP-PDIL is included in Table 4. The un<<eriainiies noted represents the range of variation among the cycles and do noi include calculational 18 of 24 Form 100l 1Qoctod) Aov X%'I CEN-353(F), Rev. 03

uncertainty. Additional conservatism should be applied to these results to envelope future cycles. The data provided have been reviewed in accordance to Nuclear Fuel's Quality instructions, The physics input data included in Reference 4, and the revised data included in this letter is representative of the current fuel management strategy, i.e. 18 month cycles. However, FPL is currently planning a change in the fuel management strategy to 24 month cycles. The potential impact of this change on the physics data has not been evaluated. If you have any questions or comments, please contact me at 552-3427. M. Jimcnez Reactor Support independent Reviewer: L.A. Martin Reactor Support Approved B . erryman Reactor Suppo Supervisor Copies To: L.A. Martin J.L. Perryman D.C. Poteralski T,E. Roberts W. Skclley D.G. Weeks 19 of 24 CEN-353(F), Rev. 03

FIGUBt 1 100X POSER 75X POWDER SnX P0eaa 8 3000 5 a egg W 10 20 30 40 50 70 80 90 l00 ) IG )20 T1NE hFTER SNADNN (NNS) ST. LUCIE UNIT I. CYCI.E 9. XI.N(N WOHlll VERSUS T IHE AFTER SllUTQNN, 10. lj00 L'I-f'll

1002 PNER VSZ PAfER 50K PtWBI 25X PECAN

           ~
              )

I I I I I I JODO 0 a 10 40 50 60 79 N Sl 1N ) I0 120 TlME AFTER QSTOON 0%55 ST. LUC]E UNJT ], OCLE JO. XENON WORTH VERSUS TJHE AFTER SHUTDOWN. ]2, 00D EFPH 0

TABLE 1 TABULAR OATA FOR THE ST. LUCIE UNIT 1 CYCLE 9 XENON MORTH VERSUS TIME AFTER SHUTOOW, 10,000 EFPH, T1me After 5% Power 75'ower lON'ower Shutdown Xenon Morth Xenon Worth Xenon Morth (Hours) (pcm) (pcm) (pcm) 0 2057 2337 2517 1 2314 2750 3070 2 2510 3)75 3508 4 2755 3506 4101 5 2819 3633 4284 6 2852 3713 4406 7 Z860 3754 4477 8 2845 '761 4505 9 2S12 3740 4496 10 2766 3697 4456 11 2707 3634 4392 12 2638 3556 4307 15 2394 3256 3968 20 1936 2662 3268 Z5 1497 2078 2567 30 1121 1572 1953 40 582 839 1059 50 272 415 538 60 106 188 259 80 0 12 42 100 0 0 0 120 0 0 0 22 of 24 CEN-353(F), Rev. 03

TABLE 2 TABULAR 0ATA FOR THE ST. LUClf UNli 1, C'fClE 10, XENON MORTH VERSUS 71HE AF7ER SHUTDOWN 12,000 EFPH, Time After 25% Power 5N Power 75'4 Power 100% Power Shutdown Xenon North Xenon Horth Xenon Morth Xenon Horth (Hours) (pcm) (pcm) (pcm) (pcs)'067 0 1569 2347 2529 1 1675 Z334 2765 3071 2 1750 2538 3094 3499 5 iN 1836 3)II 2858

                                                         )MAL 3658
                                                                       )Sl 4258 6           1831          2892            3740          4375 7           1813          2900            3781          4444 8           1785           2M6            3789          4470 9           1750           2854           3768          4459 10           1707           2807           3724          4418 ll           l660           2748            3660         4354 12           180&           2679            3582         4268 l5            1437          2432            3279         3928 20            1136          l967            2679         3233 25             860          1519            2089         2538 30             626          1132            1576          1930 40             296             576           835          1046 50             109             257           406           532

60. 10 86 176 256 80 0 0 0 42 100 0 0 0 0 120 0 0 0 0 23 of 24 CEN-353(F), Rev. 03

St. Lucie Unit 1 Borated Water Inventor Re uirement Reduction TABLE 3 Differentia) Boron Worth (DBW) versus Temperature from HZP to CZF. (Average of Cycles 8, 9 and 10) T r r 'Q 532 -12.2 +/- 0.2 400 -13.7 +/>> 0.2 325 -L4.4 ~/- 0.2 200 -155 +/- 0.2 68 -16.1 +/- 0.2 TABLE 4 HZP Power Dependent Insertion Limit (PDIL) (Average of Cycles 6, 7, 8, 9 and 10) i' Group 6 Q 55" 1430 +/- 10'EN-353(F), Rev. 03 24 of 24

ENCLOSURE (1) SUPPLEMENT 1 TO BORIC ACID CONCENTRATION REDUCTION EFFORT CEN-353 (F), REV. 03 TECHNICAL BASIS AND OPERATIONAL ANALYSIS ST. LUCIE UNIT 1}}

ML17228A458

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3.1 INTRODUCTION

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ML17228A458

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3.1 INTRODUCTION

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