ML20126A807

Discusses Applicant Request for Exemption from Examination of Reactor Coolant Makeup Sys Components Under LOCA Conditions.Requests Cooperation in Analysis & Evaluation of Exempted Piping

ML20126A807
Person / Time
Site:	Zimmer
Issue date:	02/08/1980
From:	Pawlicki S Office of Nuclear Reactor Regulation
To:	Speis T Office of Nuclear Reactor Regulation
Shared Package
ML20126A811	List: ML20126A807 ML20126A813
References
NUDOCS 8002260257
Download: ML20126A807 (1)

Text

p r o .

CLA"0RY DOMET IE:0PY peg 8 1980 Distribution:

Docket File (50-358)

NRR Reading File MEMORANDUM FOR: T. H. Speis. Chief MTEB Reading File Reactor Systems Branch RE 1.1-1 Division of Systems Safety FROM: S. S. Pawlicki, Chief Materials Engineering Branch

SUBJECT:

REVIEW OF ZIMMER REACTOR COOLANT MAKEUP SYSTEM CAPABILITY UNDER LOCA CONDITIONS .

The ASME Code Section XI (IWB-1220(b)(1)) provides for exemption from preservice and inservice examination of components if, "under the postulated condition of loss of coolant from the component during nomal reactor operation, the reactor can be shut down and cooled down in an orderly manner assuming makeup is provided by the reactor coolant makeup system only." The normal makeup system is defined by the code as, "those systems that have the capability to maintain reactor coolant inventory under the respective conditions of startup, hot standby, operation or cooldown, using onsite power."

The applicant, in the case of Zimer, has elected to %ek exemption from examination according to an analysis presented in General Electric document 22A2756, Revision 2. Section 3.2.2 as stated in the attached letter, A. W.

Szechowycz (Sargent and Lundy) to J. Halapatz (NRC), dated January 30, 1980.

The exempted piping inside diameter for water is 2.12 inches and for steam it is 4.24 inches.

We are advised that review of the analysis discussed in the attached letter is within the scope of review of the Reactor Systems Branch. We request your cooperation in reviewing the analysis and evaluating the validity of the exempted piping inside diameters identified. Your attention is called to the applicant's request for a prompt reply.

Orf dn al m,.d by 5.5.b m;di

/ (icki, Chief

,' . Engineering Branch 2 of Systems Safety

Enclosure:

As stated cc: R. J. Mattson R. M. Gamble R. P. Denise C. Y. Cheng J. P. Knight T. Taylor,(Battelle-PNL)

B. K. Grimes J. Halapatz S. S. Pawlicki V. Noonan DSS:MTEB DSS:MTEB DSS MTEB suRNA . .J. .I 'e pb ,Rh J .i.c Ki. , ,,

04Tc k. 2/ 5/ , [, 2/8/80 ,Q/80 , , ,

l NIC FORM 318 (9 76) NRCM O240 DUE. GOVERNMENT PRINTING OFFICE: 3979 289 369 8002260 2 S 7 -