ML20034H314

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Proposed TSs Change Request to Clarify Exact Design of Peach Bottom Reactor Mode Switch Shutdown Scram Bypass
ML20034H314
Person / Time
Site: Peach Bottom  Constellation icon.png
Issue date: 03/11/1993
From:
PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:
Shared Package
ML20034H312 List:
References
NUDOCS 9303170106
Download: ML20034H314 (3)


Text

a i

r ATTACHMENT 2 PEACH BOTTOM ATOMIC POWER STATION UNITS 2 AND 3 Docket Nos. 50-277 50-278 License Nos. DPR-44 DPR-56 TECHNICAL SPECIFICATION CHANGES List of Attached Pages Unit 2 Unit 3 7

7 f

~

9 9303170106 930311 PDR ADDCK 05000277 p

PDR i

i Unit 2 1

t PBAPS 1

I 1.0 DEFINITIONS (Cont'd) outage the required surveillance testing need not be performed.

until the next regularly scheduled outage.

Reportable Event - A reportable' event shall be any of.those conditions specified in Section 50.73 to 10 CFR Part 50.-

Run Mode - In this mode the reactor system pressure is at or above 850 psig and the reactor protection system is energized with APRM protection (excluding the 15% high flux trip) and i

REM interlocks in service.

4 Safety Limit - The safety limits are limits below which the reasonable maintenance of the cladding and primary systems are assured.

Exceeding such a limit requires unit shutdown and review by the Nuclear Regulatory Commission before resumption of unit operation.

Operation beyond such a limit _ may not in itself result in serious consequences, but it' indicates an operational deficiency subject to. regulatory. review.

Secondary Containment Integrity Secondary Containment integrity means that the reactor building is intact'and.the following conditions are met:

1.

At least one door in each access opening is' closed.

2.

The standby gas treatment is operable.

3.

All-Reactor Building ventilation system automatic isolation valves are operable or deactivated in the isolation position.

Shutdown - The reactor is in a shutdown condition when the reactor mode switch is in the shutdown mode position and no core alterations are being performed.

Shutdown Mode - Placing the mode switch to the shutdown position initiates a reactor scram.

After about 2 seconds, I

this SCRAM signal in bypassed.

The SCRAM logic cannot be reset until a 10 second timer is complete. The SCRAM can then be reset to restore the normal valve line-up in the control rod drive hydraulic system.

Amendment No. 102, 110 117/121 h

Unit.3 PBAPS 1.0 DEFINITIONS (Cont'd) outage the required surveillance testing need not be performed until the next regularly scheduled outage.

Reportable Event - A reportable event shall be any of those conditions specified in Section 50.73 to 10 CFR Part 50.

Run Mode - In this mode the reactor system pressure is at or above 850 psig and the reactor protection system is energized with APRM protection (excluding the 15%'high flux trip).and REM interlocks in service.

Safety Limit - The safety limits are limits below which the reasonable maintenance of the cladding and primary systems.are assured.

Exceeding such a limit requires unit shutdown and.

review by the Nuclear Regulatory Commission before resumption of unit operation.

Operation beyond such a limit may~not in itself result in serious consequences, but it indicates an operational deficiency subject to regulatory review.

Secondary Ccntainment Integrity Secondary Containment integrity means that the reactor building is intact'and the following conditions are met:

1.

At least one door in each access opening is closed.

2.

The standby gas treatment is operable.

3.

All Reactor Building ventilation system automatic 1

isolation valves are operable or deactivated in the isolation position.

Shutdown - The reactor is in a shutdown condition when the reactor mode switch is in the shutdown mode position and no core alterations are being performed.

I Shutdown Mode - Placing the mode switch to the shutdown position initiates a reactor scram.

After about 2 seconds,

.this SCRAM signal is bypassed.

The SCRAM logic-cannot ' be reset until a 10 second timer is complete. The SCRAM can then -

be reset to restore the normal valve line-up in the control rod drive hydraulic system.

-Amendment No. 102, 110 117/121

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