ML19343C234
| ML19343C234 | |
| Person / Time | |
|---|---|
| Site: | Haddam Neck File:Connecticut Yankee Atomic Power Co icon.png |
| Issue date: | 05/09/1978 |
| From: | Graves R CONNECTICUT YANKEE ATOMIC POWER CO. |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| CYH-138, RO-78-06-1P, RO-78-6-1P, NUDOCS 8103040588 | |
| Download: ML19343C234 (2) | |
Text
U *d.
J i
CONNECTICUT YANKEE AT O M I C POWER COMPANY
/
HADDAM NECK PLANT RR # 1, BOX 127E. EAST HAMPTON. CONN. 06424
,m a May 9,1978 CYH - 138
..a -
G >
- L.
- 5 lN
's.
,h)'
R:].,'. >
fp/4'4y[i57;.,gj d
U. S. Nuclear Regulatory Commission j
y g v.g Region 1 Office of Inspection and E,nforcement p
co
' e, % 2 l
U 2
631 Park Avenue t>x King of Prussia, Pennsylvania 19406 C\\
.O N
A Attn: Mr. Boyce Grier, Q]T(.i Director
Reference:
' Facility Operating License ilo. DPR-61 Docket No. 50-213 Reportable Occurrence 78-06/1P t
Dear Mr. Grier:
In accordance with the reporting requirements of Connecticut Yankee Technical Specifications, Section 6.9.2.a. the following preliminary report 71-06/1P concerning diesel generator loading above design calculations is hereby submitted.
Calculations completed on May 8,1978 show that the Connecticut Yankee Emergency Diesels (EG-2A and EG-28) would be loaded above design in the design basis Loss of Coolant Accident (LOCA) concurrent with loss of offsite power and when only one of two diesels is running.
Corrective action with regard to this situation is presently under evaluation on an expedited basis. Until such time as corrective action can be completed Connecticut Yankee strongly believes that continued operation will not pose any undue risk to the health and safety of the public based on the following.
D
- ts og 7-1 0
The probability of a Design Basis LOCA concurrent with a loss of offsite power is very low.
- Each diesel was tested today and will be tested on a weekly interval until corrective action can be effected thereby assuring diesel availability.
Notwithstanding calculations, it is felt the diesel generator would be able to operate with the existing loading.
Very truly yours, Richard H. Graves-jpg Station Superintendent RHG:JHF/jhb Office of Management Information and Program Control, Wash., D. C.
(2) cc:
1 l
l M*
e=
=we a
A em.
.-,.e.-
r e
w-ay e-