U-601277, Application for Amend to License NPF-62,increasing Vol of Fuel Oil Required for Operability of Div II Diesel Generator

Application for Amend to License NPF-62,increasing Vol of Fuel Oil Required for Operability of Div II Diesel Generator

ML20155A304
Person / Time
Site:	Clinton
Issue date:	09/23/1988
From:	Hall D ILLINOIS POWER CO.
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
Shared Package
ML20155A309	List: ML20155A321 U-601277, Application for Amend to License NPF-62,increasing Vol of Fuel Oil Required for Operability of Div II Diesel Generator
References
DPH-0852-88, DPH-852-88, U-601277, NUDOCS 8810050274
Download: ML20155A304 (6)

Text

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i o * .. U-601277 L4 7-88 ( 09-23 )-LP 1A.120 ILUN0/8 POWER lC * ^ f>

r CLINTCN PCM8t STATION. P.O. 301 678 CLINTON. ILLINCis 61727 DPH-0852-88 f September 23, 1988 10CFR50.90 Ducket No. 50-461  !

Document Control Desk  ;

Nuclear Regulatory Commission i Washington, D.C. 20555 l

Subject:

Clinton Power Station Proposed Amendment to t Facility Operating License NPF-62 l ,

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Dear Sir:

l l Pursuant to 10CFR50.90, Illinois Power (IP) hereby )

applies for an amendment to Facility 0? erating License t NPF-62 Clinton Power Station (CPS). I? requests a change to the Technical Specifications to increase the minimum volume of fuel oil required for operability of the Division II diesel generator. This increase is required due to the Fuel i Pool Cooling and Cleanup (FC) system pump motors being I replaced with motors that meet the requirements for  ;

environmental qualification (10CFR50.49). Completing the FC pump motor replacement fulfills IP's commitment to install  !

the environmentally qualified FC pump motors prior to the first refueling outage, j A complete description of and justification for the  !

change, including a basis for no significant hazards [

consideration, is provided in Attachment 2 to this letter. i Attachment 1 to this letter contains an affidavit supporting l the facts set forth in this letter. [

t This request for amendment is being submitted in  !

accordence with the provisions of 10CFR170.12 and i 10CFR170.21. In addition, pursuant to 10CFR50.91(b)(1), a .

copy of this request for amendment has been sent to the  !

Illinois Department of Nuclear Safety.

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IP has reviewed the proposed Technical Specification  !

changes against the criteria of 10CFR51.22 for environmental  ;

l considerations. The proposed changes do not involve a  :

L significant hazards consideration, do not significantly l increase the amounts or change the types of effluents that j i

I 8810050274 000923 h PDR ADOCK 05000461 ) .

P puu .

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_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __ __N

U-601277 L47-88(09 -33 )-LP 1A.120 may be released offsite, nor do they 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.

NRC review and approval of this proposed change is requested prior to January 7, 1989, in order to support offloading of irradiated fuel which is scheduled for January 10, 1989. IP requests that this change be effective upon issuance of the amendment by the NRC.

Sincerely yours,

'.P.

D all Vice President GSL/krm Attachments cci NRC Resident Office NRC Region III, Regional Administrator NRC Clinton Licensing Project Manager Illinois Department of Nuclear Safety

Attochment 1 U-601277 STATE OF ILLINOIS COUNTY OF DEWITT DONALD P. HALL, being first duly swort., deposea and says: That he ia Vice President of Illinois Power Company that the provided information has been prepared under his 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: Thisc[3 day of September 1988 f

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Signed: .n ~~

DonalU P. Hall Subscribed and sworn to before me this d / day of September 1988, r w -

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Notary Fublic W Ccmmuon byn 10/1,00 l l l

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i Attcchment 2 to U-601277 Page 1 of 5 Description of Proposed Change Technical Specifications 3.8.1.1 and 3.8.1.2 which are the Limiting Conditions for Operation specified for the AC electrical power sources [

(for OPERATING and SHUTDOWN conditions respectively), specify the ,

l minimum amount of diesel fuel that should be contained in the diesel generator fuel storage tanks to support OPERABILITY of the diesel generator 6. IP requests a chaage to these Technical Specificat$ons (3.8.1.1.b.2 and 3.8.1.2.b.2) to revise the number of gallons of fuel l f

oil specified for the Division II diesel generator (1B). The number of gallons should be changed from 41.500 to 45.000 as shown on the attached l marked-up pages from the CPS Technical Specifications. ,

Background ,

i In January of 1986. IP submitted Ah;endment 30 to the FSAR for Clinton ,

i Power Station. This amendment included a revision to Section 9.1.3.3 in which it was indicated that the maximum normal temperature to which both >

l of the Tuel Pool Cooling and Cleanup (FC) System pump motors (1A and 1B) were designed to operate could be exceeded in a post-LOCA environment. The revised section stated. "Until the first refueling, i the pump motors vill be tripped on a LOCA signal.... By the first I

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refueli.ng, replacement motors qualified to the maximum environment conditions will be installed and the LOCA-trip signal vill be removed."

This comnitment was subsequently acknowledged in Supplement 6 of the j Safety Evaluetion Report.  !

Justification for Proposed Change t

i IP has prepared a plant modification to replace the FC pump motors and remove the associated LOCA shunt trips in accordance with the commitment  !

described above. (The shunt trips automatically disconnect the TC punp [

motors from the safety-related bus by opening their associated breakers when a LOCA signal is received.) Removing the associated LOCA shunt l trips and ensuring the FC puep motors are qualified to operate in a j post-LOCA environment allows the pump motors to be regarded as safety-related essential loads powered from the Class 1E emergency [

j busses. This effectively increases the maximum expected eeergency loading for the associated diesel generators (1A and 1B). The resultant I increase in the maximum expected loading thus requires a revision of the minimum fuel oil volume specified in the Technical specifications to ensure that the diesels are capable of supplying and maintaining emergency power for all essential loads. ,

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'. Attcchment 2 [

to U-601277 Page 2 of 5 The fuel oil storage requirements for the diesel generators have been reviewed. The initial calculation of 48.000 gallons for the required minimum volume of fuel oil for the Division 1 diesel generator fuel oil storage tank was conservative. As a result, the current minimum roluma specified in the Technical Specifications for the Division 1 diesel generator (IA) is still acceptable and in accordance with the guidance of Regulatory Guide 1.137. TUEL-0IL SYSTEMS FOR STANDBY DIESEL CENERATORS. However, the Technical Specification minimum limit of '

41.500 gallons for the Division II diesel generator must be increased as noted to account for the tricreased fuel consumption required to support the additional load resulting from installation of the plant modification.**

Although Technical Specifications 3.8.1.1.b.2 and 3.8.1.2.b.2 must be changed to reflect the increased fuel consumption due to the increased load, no changes to any other Technical Specifications are required.

Technical Specifications 4.8.1.1.2.a.5 and 4.8.1.1.2.e.8. for example, are not affected since the specified full-load-carrying capability for [

each diesel generator remains unchanged. (The full-load-carrying capability of the diesel generators is based on the ratings provided by i the manuf acturer and not on the maximum expected loading.)

Additionally, a review of the diesel generator capab111 ties confirms that the diesel generators vill continue to neet the requirements of Regulatory Guide 1.9, SELECTION, DESIGN. AND QUALITICATION OT 3 DIESEL-GENERATOR UNITS USED AS STANDBY (ONSITE) ELECTRICAL POVIR SYSTEMS AT NUCLEAR POWER PLANTS.

Basis for No Significant Harards Consideration [

According to 10CTR50.92 a proposed change to the license (Technical f Specifications) involves no significant hazards consideration if operation of the facility in accordance with the proposed change would not (1) involve a significant increase in the probability or l consequences of an accident previously evaluated. (2) create the (

possibility of a new or different kind of accident from any accident }

previously evalua.ted, or (3) involve a significant reduction in a margin  !

of safety, j l

• • The loading calculation originally perforned for the Division I t l diesel generator included the FC pump motor (1A) as a load even though it was originally designed to be shunt-tripped by a LOCA l signal. Including the FC pump notor as a load was a conservative f provision that was not applied to the loading calculation perforced previously for the Division II diesel generator. (That is. TC pump notor 1B vas not included in the list of essential loads for Division II.) It was then decided that, although only one FC pu=p is required for cooling and maintaining the volume and quality of water in the spent fuel storage pools. FC pvsp notor 1B must also be included as an essential load for Division II. (Thus it must be environmentally qualified and the associated shunt trip must be removed.)

At :: chm:nt 2 to U-601277 Page 3 of 5 (1) The proposed change does not involve a significant increase in the probability or consequences of an accident previously evaluated because the proposed change will ensure that an adequate volume of diesel fuel is available for the diesel generator (1B) to perform its intended function in mitigating the consequences of the design basis accident while carrying the maximum expected load (including the associated FC pump motor). The increased maximum expected loading for the diesel generator (s), resulting from the plant modification, does not exceed the rated capacity of the diesel generators.

(2) The impact of the proposed change is confined to two areas of concern: diesel generator operability and the ability to maintain an adequate supply of high quality cooling water in the spent fuel storage pool (s) under post-accident conditions. The changes proposed by the plant modification have been thoroughly evaluated and found to have no adverse impact on the associated diesel generators' capability to perform their intended function during or following a design basis accident (DB A-LO CA) , With respect to any co merns regarding the spent fuel storage pool, including the FC pump motors as essential loads will ensure that an FC pump is available for cooling and maintaining the volume and quality of water in the spent fuel storage pools under post-accident conditions. The proposed change therefore does not create the possibility of e new or different kind of accident from any accident previously evaluated.

(3) The proposed change does not involve a significant reduction in a margin of safety because the increased minimum amount of diesel fuel to be stored for diesel generator 1B is well within the storage capacity of the fuel storage tank. In addition, the added electrical load requiring the extra amount of diesel fuel doeo not cause the maximum expectsd load for diesel generator 1B to exceed its rated capacity. The electrical loading and fuel storage demand for diesel generator 1B will still be in compliance with the original design requirements.

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