ML20073T071

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Forwards Proposed Resolution of Containment Sys & Instrumentation & Control Sys Branches Outstanding SER Issues Re Gessar II
ML20073T071
Person / Time
Site: 05000447
Issue date: 05/05/1983
From: Sherwood G
GENERAL ELECTRIC CO.
To: Eisenhut D
Office of Nuclear Reactor Regulation
References
JNF-030-83, JNF-30-83, MFN-081-83, MFN-81-83, NUDOCS 8305100298
Download: ML20073T071 (6)
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GENER AL h ELECTRIC NUCLEAR POWER SYSTEMS DIVISION GENERAL ELECTRIC COMPANY.175 CURTNER AVE., SAN JOSE. CALIFORNIA 95125  !

MFN 081-83 MC 682 (408) 925-5722

, JNF 030-83 May 5, 1983 i

U.S. Nuclear Regulatory Commission i

Office of Nuclear Reactor Regulation ,

j Washington, DC 20555 <

Attention: Mr. D.'G. Eisenhut Division of Licensing i

Gentlemen:

SUBJECT:

IN THE MATTER OF 238 NUCLEAR ISLAND GENERAL ELECTRIC STANDARD SAFETY ANALYSIS REPORT (GESSAR II) DOCKET N0. STN 50-447 RESOLUTION'0F OUTSTANDING ISSUES Attached please, find proposed resolutions to selected outstanding issues.

I This information is provided in the following attachments: ,

s ._

Attachment Number Branch

- 1 Containment Systems 2 , Instrumentation and Control Systems Sincerely, l

[or-

, Glenn G. Sherwood, Manager Nuclear Safety & Licensing Operation ,

Attachment cc: F.J. Miraglia (w/o attachments) C.0.. Thomas (w/o attachments)

D.C. Scaletti L.S. Gifford (w/o attachments) s 4

J 8305100298 830505  !

PDR ADOCK 05000 E

. . _ . _ _ _ _ _ _ _ _ __...__ _ _d_ _ _ _ _ _ . _ _ _ __ _ ._ __. _ - _ _ _ _ _

ATTACMENT NO.1 PROPOSED RESOLUTION TO CONTAINMENT SYSTEMS BRANCH OUTSTANDING ISSUES Outstanding Issue (10)

Containment Isolation (SER Section 6.2.4)

GE agrees to provide dual (series) valve barriers for test, vent and drain connections which are outside containment and can comunicate

, with the containment atmosphere or suppression pool.

Details of the dual valve barriers will be provided before the first  !

applicant references GESSAR II.

Outstanding Issue (12)

Containment Purge (SER Section 6.2.4.1)

GE agrees to provide separate penetrations for purging during nonnal operation. In addition, GE agrees to use 9-inch penetrations and valves for these purge lines unless GE can demonstrate to the satisfaction of the NRC staff that a larger diameter is justified.*

Details of the purge system will be provided before the first applicant references GESSAR II.

  • Per BTP CSB 6-4 the size of the purge lines should be about 8-inches in diamenter for PWR plants and this line size may be overly conservative from a radiological viewpoint for the Mark III BWR plant; therefore, larger lines may be justified.

ATTACHMENT 2 PROPOSED RESOLUTION TO INSTRUMENTATION AND CONTROL BRANCH OUTSTANDING ISSUES Outstanding Issue (13)

Post-Accident Monitoring Instrumentation (SER Section 7.5.2.2)

The GESSAR II design is assessed against Regulatory Guide 1.97 Revision 2 in Appendix 1D with supplementary justification for deviations provided on the docket (cover letter G. G. Sherwood to D. G. Eisenhut dated April 28, 1983). Theassessmentincludingthedeviationsandjustifica-tions are still under review by the NRC.

GE agrees that the GESSAR II design will meet designated portions of the guide; and any deviations to the remainder of the guide will be justified to the satisfaction of the staff prior to referencing GESSAR II by the first applicant.

Outstanding Issue (14)

Manual Initiation of Safety Systems (SER Section 7.3.2.7) o HPCSinjectionvalveinterlocks: GE agrees to upgrade the Level 8 trip sensor logic from its present two-out of-two signal to a one-out-of-two-taken-twice signal as indicated in GESSAR II, Section 19.3.7.42.

o Containment spray isolation valves: .In event of interlock failure, the operator can bypass the interlock and open the valve directly from the remote shutdown panel. Therefore, the present design is considered acceptable if provision is made to alert the operator of this capability in the emergency procedures.

The emergency procedures for GESSAR II are contained in Appendix 18A.

Sections 18A.3.3 and 18A.3.4 will be amended as indicated in the attached markup.

i RWS: cal /K050510 5/6/83

22A7007 Rcv. 9 18A.3.3 CN/T Monitor and Control Containment Temperature (NOTE: Caution 6 applies.)

CN/T-1 When containment temperature epceeds 90*F, operate available containment cooling.

CN/T-2 Before containment temperature reaches 185*F BUT only if suppression chamber pressure is above 1.1 psig, initiate containment sprays. Shov/d i n Ter lock.5 fall Sud that con raon ment spray valve iS f reven red fr om opcm aky, v3e Tra nsfer control at nemte ss,vTdoan Panel.

, CN/T-3 If containment temperature cannot be maintained below 185'F, EMERGENCY RPV DEPRESSURIZATION IS REQUIRED; enter EP-1 (RPV Control) at Step RC-1 AND execute it concurrently with this procedure.

CN/T-4 If containment temperature reaches the RPV Satura-tion Temperature (Figure 18A-4) ,

RPV FLOODING IS REQUIRED. Enter EP-1 at Step RC-1.

18A.3.4 PC/P Monitor and Control Primary Containment Pressure (NOTE: This procedure applies to containment and drywell pressures.)

PC/P-1 Operate the following systems, as required:

o Containment pressure control systems.

Use [*] (Containment Pressure Control).

  • Separate procedure - Applicant to provide.

18A.3-3

22A7007 l' Rev. 9 18A.3.4 PC/P Monitor and Control Primary Containment Pressure (Continued)

  • SBGT and drywell purge, only when the tempera-ture in the space being evacuated is below 212'F.

Use [*] (SBGT Operation) and [*] (Drywell Purge Operation).

PC/P-2 Before containment pressure reaches 3.2 psig, BUT only if containment pressure is above

.l.1 psig initiate containment sprays. Shovfd inte,-toeta faaI suck rnar een rain ment S

.p ,.o m opensng , use t ra ns fer conTrel aT Re.,,epray valve is prescnia!

Te Sh erdoon fa . e , .

(NOTE: Cautions 8 and 18 apply.)

PC/P-3 If containment pressure cannot be maintained below the Pressure Suppression Pressure (about 10 psig)**

EMERGENCY RPV DEPRESSURIZATION IS REQUIRED.

Enter EP-1 at Step RC-1.

PC/P-4 If containment pressure cannot be maintained below the Primary Containment Design Pressure

[15 psig]**

RPV FLOODING IS PIQUIRED.

Enter EP-1 at Step RC-1.

l l

  • Separate procedure - Applicant to provide.
    • Data for Human Factors review purpose only. Applicant to pro-vide plant unique data for plant procedures. i l

l l

18A.3-4 1

esnmery Rsv. 9 18A 3.4 PC/P Monitor and Control Primary Containment Pressure (Continued)

PC/P-5 If containment pressure cannot be maintained below the [ upper limit of Containment Pressure Indication]

then irrespective of whether adequate core cooling is assured S hould r n ter-locta fail Such t he r-spray va/Ve coisnPreve"Te Tain nsen T* d initiate containment sprays.. from of 8"'".3 v5e trans fer

Remote St, vTdc u (NOTE
Cautions 8 and 18 apply. HTroI QT f,3 ej, PC/P-6 If containment pressure exceeds the [ Upper Limit of Containment Pressure Indication],

vent the primary containment in accordance with [*]

Containment Venting) to reduce AND maintain pressure below the [ Upper Limit of Containment Pressure Indication].

. (NOTE: Caution 22 applies.)

18A.3.5 SP/L Monitor and Control Suppression Pool Water Level SP/L-1 Maintain suppression pool water level between 20 ft 5 in. and 19 f t 11 in.

Refer to [*] (sampling) prior to discharging water

[outside of the containment].

Suppression pool makeup may be augmented by SPMS.

  • Separate procedure - Applicant to provide.
    • Data for Human Factors review purposed only. Applicant to pro-vide plant unique data for plant procedures.

18A.3-5

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