ML17244A188
| ML17244A188 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 10/31/1978 |
| From: | White L ROCHESTER GAS & ELECTRIC CORP. |
| To: | Ziemann D Office of Nuclear Reactor Regulation |
| References | |
| TASK-06-07.A2, TASK-6-7.A2, TASK-RR 781032, NUDOCS 7811070142 | |
| Download: ML17244A188 (6) | |
Text
REGULA ~ORY INFORMATION DISTRIBUTI N SYSTEM DOCKET NBR:.
RECIPIENT:
ORIGINATOR:
C g-DOC DATE:
ACCESSION NBR:
COPIES RECEIVED:
COI1PANY:
SUBJECT:
Revises sched for com letion f W i
lenum in'ection of ECCS water e
LTR SIZE:
'NCL inconsistenc Also forwards sched f EXXo N
0 w r P
NAHE N
l TR ONLY W/ENCL W/ENCL
~/ENCL W/ENCl W/ENCl
~/ENCL W/ENCL W/ENCL 4t/ENCL y,/EtuCL w/ENCL W/ENCL ENCL NRC Pgp I LE QELb HANAUEP
, CORF PFRFOR~ANCE BR
,AD FOR SYS a
PROJ ENGIt4EERING 8R REACTnp SAFFTY BR PL4HT SYSTEMS BH I EER EFFLUENT TREAT SYS
, J HCGnUGH LPDR TERA NSIC ACRS DISTRTBUTION CODE t A001 NOTARIZED
'ISTR)RUTION TITLE)
GENERAL DISTRIBUTION FOR AFTER ISSUANCE'F UPER4TINf'ICENSE ENCLV FOR ACTION
(
TOTAL NUHBER OE CUPlES RKQUJREDt LTR ENCL tt0-NOTES:
STANDARDIZED PLANT I 6 E 3 CYS ALL MATERIAL gLQ
I t
l'I
ROCHESTER GAS AND ELECTRlC CORPORATI'Otk o
89 EAST AYEHUE, ROCHESTER, H.Y. 14649 LEON O. WHITE, JR.
VICE I'RESIDENT TcgCPHORK inrun CCOC Vie 546.2700 October 31, 1978 Director of Nuclear Reactor Regulation,
'".~
ATTN:
Mr. Dennis L. Ziemann, Chief Operating Reactors Branch 52 U.S. Nuclear Regulatory Commission Washington, DC 20555
Dear Mr. Ziemann:
k~
(I "i('n March 15, 1978 we informed you of the Westinghouse Electric Corporation schedule and plans for permanent, resolution of the staff concerns about upper plenum injection (UPI) of emergency core cooling system (ECCS) water.
At that time we projected a
schedule which called for completion of the Westinghouse work near the end of 1978.
After that schedule was submitted Westing-house discovered a logic inconsistency in the manner in which the zirconium-water reaction was handled in ECCS calculations.
As a
- result, manpower was shifted from the UPI project to resolution of the zirconium-water inconsistency and completion of the UPI work has been delayed by 3 or 4 months.
The revised schedule for completion of the Westinghouse UPI work is shown below:
Pro ram Work Com letion Date Model Development Generic Sensitivity Studies Plant Calculation December 1978 January 1979 April 1979 It, will be desirable to discuss the capabilities of the com-pleted model with you prior to performing extensive calculations.
If the NRC staff requires changes to the completed model, sensitivity studies and plant calculations may be postponed to incorporate model changes.
Exxon Nuclear Corporation is also working to resolve staff concerns about UPI.
The Exxon schedule is as follows:
.781.107 0 t9~
>>0 o<
LW6) p g QlN
ROCHESTER GAS AND ELK TRIC CORP.
DATE October 31,.1978 To Mr. Dennis L. Ziemann, Chief SHEET NO.
Pro ram Work Develop System Model with Pre-liminary Core Energy Release Model Finalize Energy Release Model Perform Sample Problem Calculation Document Model and Results of Sample Problem Specific Plant Calculation Com letion Date
- December, 1978
- January, 1979
- February, 1979
- March, 1979 To Be Determined Both of the above schedules include only that work to be per-formed by the respective fuel vendor.
Review by Rochester Gas and Electric and NRC personnel will require additional time.
Sincerely yours,
~.p