ML20116B275

From kanterella
Revision as of 13:26, 16 May 2020 by StriderTol (talk | contribs) (StriderTol Bot insert)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigation Jump to search
Forwards Outline of Preliminary Analysis for Hydrogen Control,Endorsing Hydrogen Control Owners Group Hydrogen Control Program Plan.Final Analysis Will Be Submitted by 850531
ML20116B275
Person / Time
Site: Clinton Constellation icon.png
Issue date: 04/03/1985
From: Spangenberg F
ILLINOIS POWER CO.
To: Schwencer A
Office of Nuclear Reactor Regulation
References
U-0820, U-820, NUDOCS 8504250180
Download: ML20116B275 (3)


Text

i.- .

U 0820 N88-85 (04-03 )-L

, lA.120

/LLINDIS POWER COMPANY CLINTCN POWER STATION. P.o. BOX 678. CLINTON. ILLINOIS 61727 April 3, 1985 Docket No. 50-461 Director of Nuclear Reactor Regulat Mn Attention: Mr. A. Schwencer, Chief Licensing Branch No. 2 Division of Licensing US Nuclear Regulatory Commission ,

Washington, DC 20555 Subj ect: Clinton Power Station Hydrogen Control, License Condition #5

Dear Mr. Schwencer:

Illinois Power Company (IPC) is actively involved in a program to resolve the degraded core hydrogen control issue. This program includes both plant specific work and generic work through the Hydrogen Control Owners Group (HCOG). These efferts are directed toward compliance with the Nuclear Regulatory Commission's (NRC) hydrogen control rulemaking set forth in 10CFR50.44(c)(3). The purpose of this letter is to endorse the HCOG Hydrogen Control Program Plan and to identify the scope of information that will be provided to the NRC concerning hydrogen control at Clinton Power Station (CPS).

On December 14, 1984, HCOG submitted its Hydrogen Control Program Plan via HGN-024. This was subsequently revised on February 19, 1985, via HGN-029 and again on February 28, 1985, via HGN-030. IPC feels that this plan presents a suitable program of experiment and analysis as required in 10CFR50.44(c)(3)(iv)(A), and that the approach set forth in this plan will satisfactorily resolve the hydrogen control issue for CPS. On this basis, IPC endorses the Hydrogen Control Program Plan, as revised, as applying to CPS. The results of specific subtasks, activ-ities and reports will be individually endorsed after their applica-bility to CPS has been established, l

l In order to provide a basis to support interim operation of CPS at full power until such time that generic work is completed and a final analysis is submitted, IPC will submit a preliminary analysis of CPS hydrogen control by September 16, 1985. The scope of information to be provided in this analysis is attached. It includes 1) a detailed description of the CPS Hydrogen Ignition System (HIS), 2) ultimate l capacity analyses, 3) containment response analyses and 4) a comparison of significant CPS design features and analysis to those of Grand Gulf Nuclear Station. IPC believes that submittal of this information will l

. exceed the requirements of 10CFR50.44(c)(3)(vii)(B). A schedule for completion of the final analysis will be submitted to the NRC by May 31, 1985, in accordance with 10CFR50.44(c)(3)(vii)(A). This schedule will be consistent with the HCOG program, N M N M IG # L p

8504250100 850403' PDR ADOCK 05000461 r /

A>

3 )

i A PDR m.. % 3,. U [-

l

U-0820 N88-85(04-03 )-L 1A.120 IPC believes that submittal of the information described in this letter will provide a satisfactory basis for the NRC staff's deter-mination to support interim operation of CPS at full power until final analysis has been completed. It is requested that the staff acknowledge the acceptability of this scope of information by April 30, 1985.

If you have any questions concerning this information, please contact me.

Sinc y yours, z,4 F. A4 Spadgenb'e Diredtor-$uclear Licensing and Configuration Nuclear Station Engineering KAB/ lab Attachment cc: B. L. Siegel, NRC Clinton Licensing Project Manager C. R. Stahle, NRC Hydrogen Control Program Manager C. G. Tinkler, NRC Containment Systems Branch NRC Resident Office Regional Administrator, Region III, USNRC Illinois Department of Nuclear Safety.

d e

Scopa of Pra11minsry Analysis for Hydrogen Control

- 1) Hydrogen Ignition System Design This section will include a description of the Hydrogen Ignition

- System (HIS) design including design criteria, igniter description, igniter locations, power supply and controls, testing, and system operation.

2) Ultimate Capacity Analysis

. This section will contain references to previous IPC submittals on the CPS containment ultimate capacity analyses and summarize the key conclusions from those analyses. Containment negative pressure capability and drywell positive and negative pressure capabilities will also be addressed. i

3) Containment Response Analysis ,

This section will summarize the results of a detailed report on analysis of containment response to hydrogen deflagrations utilizing the 1 CLASIX-3 computer code. The event scenarios used for establishing hydrogen and steam release histories and CLASIX-3 analysis methodology will also be discussed.

4) Grand Gulf Design Comparison The NRC staff has extensively reviewed the hydrogen control system for the Grand Gulf Nuclear Station (GGNS). This review provided a partial basis for NRC issuance of a full power operating license for GGNS. .This section of the analysis will describe the similarities and ,

differences between key design features and analyses for CPS and GGNS.

This comparison will demonstrate similarity with the GGNS design that has been determined to be safe to operate at full power.

i

. The key design features and analyses to be compared include:

1) HIS design l 2) Containment Structural Capacity Analysir

, 3) Containment Systems Design-

! 4) Containment Response Analysis

( 5) Systems and components required I

to survive a hydrogen burn i

i l

l l

,---.-~~..e+m. .

<- 1 e , -----3 ,..w- , 4 , --- . -,+,-..,-my.,,.-iew+,, -

_,,,w----..r-._.%y. -,r.,-,---.-.--w-e--,-.w_,-,.-ma-ms%-,-,+.e.-