Text

Errata to Amend 42 to License NPF-43,changing Tech Specs to Correct Text Error & Tech Specs Bases Page B 3/4 2-4a to Show Change in Bounding Curves
	ML19325D908
Person / Time
Site:	Fermi
Issue date:	10/19/1989
From:	; NRC
To:	;
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ML19325D910	List: ML19325D908;
References
	NUDOCS 8910270150
	Download: ML19325D908 (6)
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1 1.45 1.45 j

1 1.4

- 1.4 i

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CURVE 0

,.....x.... X

p... w X....x.... n.,,,,,.

_1.36

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1.36; 1.35 4 4. + cub +C 1.35 1.31..+-+A i

, CURVE _e,

1.3 1.3..

R

/s

/

[URVE A i

1.25' 1.25 j

l 1.2

- 1.2 1.15 l

1.15 0 0.10.20.00.40.50.60.70.80.91.0 TAU l

CURVE A + WCPR limit for CCC opetellonel mode with both turbine bypees and moleture espetetor tehostet in service.

CURVE 9 MCPR limit for non CCC operational mode with bott; turbine bypees and moisture espetetor rehester in service.

CURVE C = MCPR limit tot both CCC or non.CCC operellonel modes w.thout either turbine bypees or meleture esperator reheeler.

CURVE D + MCPR limit for both CCC and non*CCC operellonel trades without both turbine bypese and moisture esperator I

tehoster.

BOC TO 12.700 MWD /ST MINIMUM CRITICAL POWER RATIO (MCPR) VERSUS TAU AT RATED FLOW FIG URE 3.2.3 1 3

FER'il - UNIT ?

3/4 2-8 Amendment No M.42 n

8910270150 691029 TTiR ADOCK 0500)341 P

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i 1

1.46 1.46 t

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1.4 cynyg o

1p3, y,...y... H '* x....x,,,,

M " * *3... x... X " "* " '

1.36 i

1.36 CURVE C 1.36

.4..+--+~+,.4--

1.36 1.33... + ~+ #

1.34 M

CURVE 9 h

1.3t t

1,+

- 1.3 I

1.27 4

CURVE A I

1.26

- 1.26 l

1.2 1.2 i

1.16' 1.16

[

0 0.10.20.30.40.60.60.70.60.91.0 i

TAU l

i CURVE A

WCPR limit for CCC opetellenel mode with both l

turbine bypset and moletute espetelot teheeler in estvloe.

j l

CUHVE 9

WCPR limit for mon *CCC opetellomal mode with both

[

turbine bypees and moletuto espetetet tehestet in estvlee.

I C U RV E C

W C P R lim i t f o r b o t h C.C, C o.r n o,n CC C,o p e t e i.io,n a l et modte wnho i siihet i bi br see e mo e

eeparator rehester, s

CURVE D

WCPR flmit for both CCC or non*CCC opetellonel modes without both turbine bypese and moleture espeteter i

tenecie,.

12,700 MWD /ST TO 13,700 MWD /ST L

MINIMUM CRITICAL POWER RATIO (MCPR) VERSUS TAU AT RATED FLOW FIGURE 3.2.3-1 A FERMI - UNIT 2 3/4 2-8a Amendment No. 42 l

l

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g I

f l

l 1.45 q 1.4 5 f

i I

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CURVE D

",I'4 X' " ' 1.39

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1.36) ;. X""X""

CURVE C

. 1.36 i

+ -+ 'Y

- 1.35 I

1.35

+ 4

- e 1.3 4 4.+

1.3 3 -- '+

M Cunvt e l

C 1.3 1.32 1

4 4

P

/y R

1.28 CURVE A i

1.25 1.25 1.2

- 1.2 l

i-t i

1.15 1.15 i

0 0.10.20.30.40.50.6070.80.91.0

^

TAU CURVE A

WCPR limit for CCC operational mode with both i

turbine bypees and moleture esperator rehester in service.

f CURVE B + WCPR limit for men *CCC operstlenal mode with both turbine bypees and moleture separator rehester in service.

CURVE C

WCPR limit for both CCC and men *CCC operellonel modes without either turbine bypeso er moletute separator reheeler, i

CURVE D + WCPR limit for both CCC or non CCC operellonel modes without both turbine bypees and moleture esporter

{

rehester.

13.700 MWD /8T TO EOC MINIMUM CRITICAL POWER RATIO VE RSUS TAU AT R ATED F LOW FIG URE 3.2.3-1B TERMI - UtilT 2 3/4 2-8b Amendment No. 42

-..n

= - -

e.

POWER DISTRIBUTION LIMITS 3/4.2.4 LINEAR HEAT GENERATION RATE LIMITING CONDITION FOR OPERATION l

3.2.4 The LINEAR HEAT GENERATION RATE (LHGR) shall not exceed 13.4 kw/ft for bundle types BCR183 and BCR233 or 14.4 kw/ft for bundle types BC3180 and BC318E.

APPLICABILITY:

OPERATIONAL CONDITION 1, when THERMAL POWER is greater than or equal to 25% of RATED THERMAL POWER.

ACTION:

With the LHGR of any fuel rod exceeding the limit, initiate corrective action within 15 minutes and restore the LHGR to within the limit within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months or reduce THERMAL POWER to less than 25% of RATED THERMAL POWER within the next 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months .

SURVEILLANCE REQUIREMENTS 4.2.4 LHGR's shall be determined to be equal to or less than the limit:

a.

At least once per 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months , b.

Within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months after completion of a THERMAL POWER increase of at least 15% of RATED THERMAL POWER, and c.

Initially and at least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months when the reactor is operating on a LIMITING CONTROL ROD PATTERN FOR LHGR.

d.

The provisions of Specification 4.0.4 are not applicable.

I i

FERMI UNIT 2 3/4 2-10 Amendment No. 42 L.

l i

t REACTIVITY CONTROL SYSTEMS I

BASES i

3/4.1.5 STANDBY LIQUID CONTROL SYSTEM The design objective of the Standby Liquid Control (SLC) System is two fold.

One objective is to provide backup capability for bringing the reactor from full power to a cold, Xenon-free shutdown, assuming that the withdrawn i

control rods remain fixed in the rated power pattern.

The second objective of the SLC System is to meet the requirement of the ATWS Rule, specifically 10 CFR 50.62 paragraph (c)(4) which states that, in part:

"Each boiling water reactor must have standby liquid control system i

(SLCS) with a minimum flow capacity and boron concent equivalent in control capacity to 86 gallons per minute of 13 weight percent sod',um pentaborate solution."

The SLC System uses enriched Boron-10 (contained in the Sodiuni pentaborate solution) to comply with 10 CFR 50.62 paragraph (c)(4).

The methods used to determine compliance with the ATWS Rule are in accordance with Reference 2.

t To meet both objectives, it is necessary to inject a minimum quantity of l

2350 net gallons of 65 atom percent Boron-10 enriched sodium pentaborate in a solution having a concentration of no less than 9.0 weight percent (see i

Figure 3.1.5-1 for equivalent volumes and concentration ranges).

The equivalent concentration of natural boron required to shutdown the reactor is 660 parts per million (ppm) in the 70 F moderator, including the Recirculation I

loops and with the RHR Shutdown Cooling Subsystems in operation.

In addition to this, a 25 percent margin is provided to allow for leakage and imperfect mixing (825 ppm).

The pumping rate of 41.2 gpm provides a negative reactivity i

insertion rate over the permissible sodium pentaborate solution volume range, which adequately compensates for the positive reactivity effects due to moderator temperature reduction and xenon decay during shutdown.

The temperature requirement is necessary to ensure that the sodium pentaborate l

remains in solution.

l With redundant pumps and explosive injection valves and with a highly l

reliable control rod scram syste% operation of the reactor is permittea to continue for short periods of time with the system inoperable or for longer periods of time with one of the redundant components inoperable.

The SLC tank heaters are only required when mixing sodium pentaborate and/or t;ater to establish the required solution operating parameters during additions to the SLC tank.

Normal operation of the SLCS does not depend on these tank heaters to maintain the solution above its saturation temperature.

Technical require-ments have been placed on the tank heater circuit breakers to ensure that their failure will not degrade other SLC components (see Specification 3/4.8.4.5).

i Surveillance requirements are established on a frequency that assures a high reliability of the system.

Once the solution is established, boron concentration will not vary unless more boron or water is added, thus a check on the temperature and volume once each 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months assures that the solution is available for use.

Analysis of Boron-10 enrichment each 18 months provides sufficient assurance that the minimum enrichment of Boron-10 will be maintained.

I FERMI - UNIT 2 B 3/4 1-4 Amendment No. 33, 42

I,

l

[-

POWER DISTRIBUTION LIMITS l

f' BASES 3/4.2.3 MINIMUM CRITICAL POWER RATIO (Continued) 100% power / flow region and the extended load line region l

with 100% power and reduced flow, f

Curve A provides the MCPR limit assuming operation above 25 percent RATED l

THERMAL POWER with the turbine bypass system and moisture separator reheater l

in service.

The curve was developed based upon the operating MCPR limits for a rod withdrawal error transient (UFSAR, Section 15.4.2) for operating within the CCC control rod patterns and a Main Turbine Trip with Turbine Bypass Failure transient (UFSAR, Section 15.2.3).

CCC control rods are A2 rods, Al shallow rods (inserted less than or equal to nctch position 36), all peripheral rods, and all rods inserted to position 46.

The analysis of the Main Turbine Trip i

with Turbine Bypass failure takes credit for the steam flow to the moisture separator reheater.

Curve B provides the MCPR limit assuming operation at,ove the 25 percent RATED THERMAL POWER with the turbine bypass system and moisture separator reheater system in service and non-CCC control rods inserted in the core.

Non-CCC control rods are all rods excluding A2 rods, Al shallow aods (inserted less than or equal to notch position 36), all peripheral rods, and all rods inserted to position 46.

The curve was developed based upon the operating MCPR limits for a rod withdrawal error transient (UFSAR, Section 15.4.2) for any operating withdrawal sequence.

Curve C provides the MCPR limit assuming operation above the 25 percent RATED THERMAL POWER with the moisture separator reheater operable and turbine bypass system inoperable or the moisture separator reheater inoperable and the turbine bypass system operable.

The curve was developed based upon the operat-l ing MCPR limits for several combinations of Feedwater Controller Failure.

l Operatiri with main turbine bypast inoperable or with a moisture separator reheater inc erable results in a total reactor steam flow bypass capability of approximately 10 percent and 26 percent, respectively.

The impact of operation with the moisture separator reheater inoperable but with bypass operable and utilization of Curve C is conservative because the 26 percent bypass capability is less limiting with regard to the existing analysis used to establish Curve C l

which assumes only 10 percent bypass capability (with the main turbine bypass l

system inoperable).

Therefore, the operation above 25 percent RATED THtRMAL POWER with either the moisture separator reheater inoperable or main turbine bypass system inoperable is bounded by the existing Curve C.

l Curve D provides the MCPR limit assuming operation above the 25 percent RATED THERMAL POWER with both the moisture separator reheater inoperable and the turbine bypass system inoperable.

The curve was developed based upon the operating MCPR limits from the feedwater Controller Failure.

I There is no mode change restrair,t should the main turbine bypass or the moisture separator reheater be inoperable.

However, should the main turbine FERMI - UNIT 2 B 3/4 2-4a Amendment No. 29, 42

'

ML19325D908

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