ML19312B810

Proposed Tech Specs 3.5-9 & 3.5-24a,deleting Existing Reactor Core Quadrant Power Tilt & Control Rod Position Limits & Instituting More Conservative Limits

ML19312B810
Person / Time
Site:	Oconee
Issue date:	10/26/1977
From:	DUKE POWER CO.
To:
Shared Package
ML19312B808	List: ML19312B807 ML19312B810
References
NUDOCS 7911190589
Download: ML19312B810 (3)

Text

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ATTACEMENT 1 CCONEE NUCLEAR STATION PROPOSED TECHNICAL SPECIFICATION REVISION october 26, 1977 7911190$ 87 0

1 V y pump operation. )Also,exceptingphysicstests j) exercising __.._ _

centrol rods, the axial power _ shaping control rod insertion /

withdrawal limits are specified ~ on figures 3.5.2-4A1, 3.5.2-4A2 and 3.5.2-4A3-(Unit 1); 3.5.2-431, 3.5.2-4B2, and 3.5.2-4B3 (Unit 2). If the control rod position limits are exceeded, corrective measures shall be taken immediately to achieve an i

acceptable control rod position. An acceptable ~ control rod position shall ther be attained within two hours. The minimum shutdown margin required by Specification 3.5.2.1 shall be maintained at all times.

d. Except for physics tests, power shall not be increased above the power level cutoff as shown on Figures 3.5.2-1A1, 3.5.2-1A2 and

3. 5. 2-1A3 (Unit 1) , 3. 5. 2-181, 3. 5. 2-132, ~ and 3. 5. 2-133 (U. nit 2) ,

and 3. 5. 2-lC1, 3. 5. 2-lC2, 3. 5. 2-1C3 (Unit 3), unless the following requirements are met.

(1) The xenon reactivity shall be within 10 percent of the value for operation at steady-state rated power.

(2) The xencn reactivity worth has passed its final maximum or minimum peak during its approach to its equilibrium valve for operation at the power level cutof f.

3.5.2.6 Reactor power i= balance shall be monitored on a frequency not to exceed two hours during power operation above 40 percent rated power.

Except for physics tests, imbalance shall be maintained within the envelope defined by Figures 3.5.2-3A1, 3.5.2-3A2, 3. 5. 2-3 A3, 3.3. 3-331, >

3.5.2-332, 3.5.2-333, 3.5.2-3C1, 3.5.2-3C2, and 3.5.2-3C3. If the in-balance is not within the envelope defined by these figures, corrective measures shall be taken to achieve an acceptable imbalance. If an accep-table imbalance is not achieved within two hours, reactor power shall be reduced until imbalance limits are met.

i 3.5.2.7 The control rod drive patch panels shall be locked at all times with limited access to-be authorized by the manager or his designated alternate.

3.5.2.8 For Oconee Unit 1, in the event Specificaticns 3.5.2.4.a or 3.5.2.5.c are not met, operation shall be restricted as folicws:

a. The core thermal power shall be limited to 75 per; cent full power.

b. The nuclear power maximum setpoint shall be 84 percent full power.

c. The quadrant tilt shall not exceed 6.03 percent.

d. The regulating control rod insertion / withdrawal limits are specified.on Figure.3.5.2-6Al i I

If any of t'he above provisions are not met within two hours, the reactor shall be in the hot shutdown condition within ,an additional 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.

3.5-9 l

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0" "AI'CN IN (126,102) (170,102)

THl3 REGION 13 NOT ALLO 1ED gg _

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(280,73) 70 -

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{Y e: .YN >?? bDiIT RESTRICTED REGION f 50 -

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2 30 - (280,40) 20 - (36,1h PEEISS M E g OPERATING REGICN 10 OC I I I t  !  ! t i 0 (30,0) (75,0) 100 200 EO R3d indet, $ fithdf3nn 0 25 50 75 100 0 25 50 75 100 I ' ' I I I j l l t Cf3UU 5 Group 7 0 25 50 75 100 1  ; , , ,

GT3up $

R3d 30003 15 Int ptt: tat 3{t su:: Of Int withdf 3s31 Of SfCups 5.5 and 7 1

R00 POSITION LIMITS FOR-FOUR-PUMP OPERATION FRCM 0

.,. TO 100 (:10) EPPO, UNIT i cirmam OCONEE NUCLEAR STATION Q3 FIG RE 3.5.2-6Al 3.5-24a