U-601181, Application for Amend to License NPF-62,changing Tech Specs to Provide Addl Info Re Sensor/Channel Configuration for Main Steam Line Turbine Bldg & Revising Setpoint Requirements.Fee Paid

Application for Amend to License NPF-62,changing Tech Specs to Provide Addl Info Re Sensor/Channel Configuration for Main Steam Line Turbine Bldg & Revising Setpoint Requirements.Fee Paid

ML20154J455
Person / Time
Site:	Clinton
Issue date:	05/18/1988
From:	Hall D ILLINOIS POWER CO.
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
Shared Package
ML20154J458	List: ML20154J464 U-601181, Application for Amend to License NPF-62,changing Tech Specs to Provide Addl Info Re Sensor/Channel Configuration for Main Steam Line Turbine Bldg & Revising Setpoint Requirements.Fee Paid
References
DPH-0454-88, DPH-454-88, GL-83-36, U-601181, NUDOCS 8805260394
Download: ML20154J455 (6)

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U-601181 L47-88 ( os - 18)-LP 1A.120 ILLINDIS POWER DOMPANY CLINTON PCMER STAtlCN. P.O. BOX 678. CLINTON, ILLINOIS 61727 DPH-0454-88 May 18, 1988 10CFR50.90 Docket No. 50-461 Document Control Desk Nuclear Regulatory Commission Washington, D.C. 20555

Subject:

Clinton Power Station

- Proposed Amendment to Facility Operating License NPF-62

Dear Sir:

Pursuant to 10CFR50.90, Illinois Power Company (IP) hereby applies for an amendment of Facility Operating License NPF-62 Clinton Power Station (CPS). In accordance with 10CFR50.30, one signed original of this application is enclosed. In addition, according to the requirements of 10CFR50.91(b)(1), a copy of this request for amendment has been sent to the Illinois Department of Nuclear Safety as indicated below.

This request for amendment consists of five separate changes to the Technical Specifications. A description and justification for each change, including a basis for no significant hazards consideration, is provided in Attachment 2 to this letter. An affidavit supporting the facts set ,

forth herein accompanies this letter, i l

In accordance with the provisions of 10CFR170.12 and  !

170.21, IP is enclosing a check made out to the U.S. Nuclear l Regulatory Commission in the amount of $150.00 as payment of i the application fee for this amendment. j v oia5;uso s4 8805260394 880518 ,5 ,\  ;$I PDR P

ADOCK 05000461 DCD

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U-601181 L47-88( 05 - 18)-LP 1A.120 IP has reviewed the proposed Technical Specification ,

changes against the criteria of 10CFR51.22 for the environmental considerations. The proposed changes do not involve a significant hazards consideration, significantly .

increase the types and amounts of effluents that may be released outside, or significantly increase individual or cumulative occupational radiation exposures. Based on the foregoing, IP concludes that-the proposed Technical Specification changes meet the criteria given in 10CFR51.22(c)(9) for a categorical exclusion from the requirement for an Environmental Impact Statement.

Sincerely yours, D. . Hall Vice President KBR/krm Attachments cc: NRC Resident Office NRC Region III, Regional Administrator NRC Clinton Licensing Project Manager Illinois Department of Nuclear Safety l

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I Attachment 1 to U-601181 STATE OF ILLINOIS COUNTY OF DEWITT  !

l DONALD P. HALL, Being first duly sworn, deposes and I says: That he is Vice President of Illinois Power Company:

that the provided information has been prepared under his

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supervision and directions that he knows the contents thereof: and that to the best of his knowledge and belief said request and-the facts contained therein are true and Correct. .

DATED: This // Iy of May 1988 i

Signed:

Donald P. Hall Subscribed and sworn to before me this $ day of May 1988.

$ 02d Notary Public l l

My commission expires:

.bFFICIAL SEAL" l'

, Deborn L Bean Netary Public, State of Imnois Ny Commission Expires 10/1/90  ;

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Attachment 2 to U-601181

, Page 1 of 25 il Summary of Proposed Changes Starts on i Package No. Page No. Summary 1 2 Table 3.3.2-1, item 2.h: Add a note providing additional information regarding the sensor / channel configuration for the Main Steam Line Turbine Building Temperature - High trip channel.

2 6 4.1.3.3.b.1.b: Revise setpoint requirements for control rod scram accumulator low pressure alarm from 1520 +30, -0 psig to greater than or equal to 1520 psig.

3 9 3/4.3.7.8: Add contingency to note that removal of all chlorine on site allows removal of the chlorine detection system.

4 15 Table 3.3.7.5-1: Revise ACTION statements associated with  ;

H9 /0 2 e nitor to be consistent with Generic Letter 83-36.

5 20 Table 4.11.2-1, Note c: Revise note to include conditions under which the sampling is not

required. (These conditional exceptions are currently only specified in note "g" but they snould also apply to note "c".)

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, Attachment 2 i to U-601181 '

Page 2 of 25 PACKAGE NUKBER 1 Description and Justification of Proposed Change Illinois Power is requesting a change to Technical Specification Table 3.3.2-1 to add a note applicable to item 2.h. The note will provide additional .

c information regarding the channel configuration for the Main Steam Line (MSL). l Turbine Building Temperature - High trip channels which provide for automatic ,

q isolation of the main steam lines.

1 i The MSL Turbine Building Temperature sensors are arranged such that five creas are monitored with four temperature sensors in each area. Each of the four temperature sensors in a particular area is associated with a separate division. (The "A" sensor is associated with Division I, the "B" sensor is associated with Division II, the "C" sensor is associated with Division III,  !

and the "D" sensor is associated with Division IV.) Each sensor l (thermocouple) provides a signal to a temperature module (trip unit). The relay contacts associated with the temperature modules within a particular division are connected in series. Thus, there are four divisional strings (channels) of temperature modules with five temperature modules in each string (channel). If any temperature module is tripped within a channel, then a trip occurs for that division. A channel is considered inoperable if one or  ;

a more temperature modules and/or sensors within that channel is inoperable ,

(although in most cases, a temperature module will fail "open" such that a i

trip condition results). Each channel provides input into each of four '

two-out-of-four logics. It therefore requires a trip from at least two divisions (i.e., channels) to initiate a main steam line isolation (MSIV closure).

The ACTIONS and OPERABILITY requirements for the MSL isolation instrumentation of Specification 3.3.2 are structured in accordance with the any-two-from-four sensor logic scheme. Thus, four channels are assumed and each channel is associated with one of four divisions. Since there are 20 sensors associated with the Main Steam Line Turbine Building trip system, a note to Table 3.3.2-1 is proposed to reconcile this configuration with the four-channel format. The proposed note reads as follows:

i Each channel consists of five temperature modules and their associated 1

sensors. A channel is OPERABLE if and only if five temperature modules t and their associated sensors are OPERABLE.

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l This note will clarify the OPERABILITY requirements for the Main Steam Line '

Turbine Building Temperature channels thus eliminating any confusion regarding I compliance with the Limiting Condition for Operation and the associated ACTIONS. Th* intent of the existing Technical Specification vould remain

unchanged.

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I J Basis For No Significant Hazards Consideration According to 10CFR50.92, a proposed cuange to the license (Technical Specifications) involves no significant hazards consideration if operation of 2

the facility in accordance with the proposed change would not (1) involve a significant increase in the probability or consequences of an accident

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previously evaluated. (2) create the possibility of a new or different kind of accident from any accident previously evaluated, or (3) involve a significant i reduction in a margin of safety. i 1

,=- - ._ .. - -. . ,, . ., . -_ _ _ - .- _ _ _ _ _ _ _ _ _ _ _

Aegachment 2 to U-601181 Page'3 of 25 (1) The proposed change does not involve a significant_ increase in the probability or consequences of an accident previously evaluated because I the proposed change is only a tcxtual clarification to the operability requirements currently specified in the Technical Specifications for the Main Steam Line Turbine Building Temperature - High trip channels and does not impact the main steam line isolation trip function.

(2) The proposed chang, does not create the possibility of a new or ditierent kind of accident from any previously evaluated because the proposed change will not create any new modes of operation or new failure modes and does not impact plant design.

(3) The proposed change does not involve a significant reduction in a margin l l of safety since the change does not involve any changes to setpoints or  !

limits associated with any margin of safety assumed or required by a  !

safety analysis.

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