ML18038A624

Proposed Tech Spec 4.6.2a Re Instrumentation Initiating Scram

ML18038A624
Person / Time
Site:	Nine Mile Point
Issue date:	01/30/1984
From:	NIAGARA MOHAWK POWER CORP.
To:
Shared Package
ML18038A622	List: ML18038A621 ML18038A623 ML18038A624
References
NUDOCS 8402070154
Download: ML18038A624 (12)

Text

ATTACHMENT A NIAGARA MOHAWK POWER CORPORATION LICENSE NO. OPR-63 00CKET NO. 50-220 Pro osed Chan es to Technical S ecifications endix A Replace existing pages 194 and 195 with the attached revised pages. These pages have been retyped in their entirety with marginal markings to indicate changes~ to the text.

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V TABLE 4.6.2a INSTRUMENTATION THAT INITIATES SCRAM Surveillance Requirement Instrument Instrument Channel Parameter Sensor Check Channel Test Calibration (1) Manual Scram None Once per 3 None months (2) High Reactor None Once per month(1) Once pqr 3 Pressure months<1)

(3) High Drywel 1 None Once per month(1) Once pyr 3 Pressure months(1)

(4) Low Reactor Water Once/day Once per month(1) Once pyr 3 Level months(>)

(5) High Water Level None Once per month Once per 3 Scram Discharge months Volume (6) Main-Steam-Line None Once per 3 Once per operating Isolation Valve months cycle Position (7) High Radiation Once/shift Once per week Once per 3 months Main-Steam Line 194

TABLE 4.6.2a (Cont'd)

INSTRUMENTATION THAT INITIATES SCRAM Survei 1 1 ance. Re uirement Instrument Instrument Channel Parameter Sensor Check Channel Test Calibration (8) Shutdown Position None Once during each None of Reactor Mode major refueling Switch outage (9) Neutron Flux (a) IRM (i) Upscale (f) (f) (f)

(ii) Inoperative (f) (f) (f)

(b) APRM (i) Upscale None Once/week Once/w'eek (ii) Inoperative I

None Once/week Once/week (iii) Downscale None Once/week Once/week (10) Turbine Stop None Once per 3 months Once per operating Val ve Closure cycle (ll) Generator Load None Once per month Once per 3 Rejection months 195

4 ATTACHMENT B NIAGARA MOHAWK POWER CORPORATION LICENSE DPR-63 DOCKET NO. 50-220 Su ortin Informati on The proposed changes to the technical specifications are in response to a commitment made by Niagara Mohawk to the U.S. Nuclear Regulatory Commission.

Discussions were held regarding the necessity of calibrating the instrument channel of the main steam line isolation valve position limit switch. Niagara Mohawk subsequently committed to revising Table 4.6.2a, "Instrumentation that

- " Upon review of this table, Initiates Scram Surveillance Requirements.

Niagara Mohawk determined that the turbine stop valve closure switch falls into the same category and, therefore, should also be calibrated every operating cycle.

k ATTACHMENT C NIAGARA MOHAWK POWER CORPORATION

. LICENSE OPR-63 OOCKET NO. 50-220 Anendment Classification The proposed amendment to the Operating License has been determined to fall under the Class III Anendment fee of $ 4,000 in accordance with 10CFR170.22.

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ATTACHMENT 0 NIAGARA MOHAWK POWER CORPORATION LICENSE DPR-63 DOCKET NO. 50-220 No Si nificant Hazard Considerations Anal sis The proposed Technical Specification changes submitted herein involve no significant hazard considerations. Therefore, in accordance with the proposed amendment, the operation of Nine Nile Point Unit 1 will not:

1) involve a significant increase in the probability or consequences of an accident previously evaluated; or

2) create the possibility of a new or different kind of accident from any accident previously evaluated; or

3) involve a significant reduction in a margin of safety.

The Commission has provided guidance concerning the determination of significant hazards by providing certain examples (48FR14870) of amendments considered not likely to involve significant hazards consideration. One of the examples relates to a change which constitutes an additional limitation, restriction or control not presently in the Technical Specifications. The proposed Technical Specification change is similar to this in that it imposes more stringent surveillance requirements.

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