ML19352A112
| ML19352A112 | |
| Person / Time | |
|---|---|
| Site: | Haddam Neck File:Connecticut Yankee Atomic Power Co icon.png |
| Issue date: | 06/21/1974 |
| From: | Hartley F CONNECTICUT YANKEE ATOMIC POWER CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| CYH-2683, NUDOCS 8103060120 | |
| Download: ML19352A112 (1) | |
Text
_
ME
.. [,.:
'HADDAM NECK PLANT I.'
- ;. - rj
- a.
4
( i:' R R # t. B O X 1 1 CAST HAMirrON, CONN. OGG
)
- w. "s<
2.~
v; c #c:ce c,... l.
.-June.21,,1974
...i i g, ',
- a. : CYH ;2683 [yb' / jg(,
..l;;.<.,j ~ ;
't i. '..
j"
..,.,.,..1.Wl2;.
!p < l,., -
j
.. c.
...;.. i l
s
"' " '- S ;:,.g.,' :..j..;.c.'.., ' "';f.f.'".'
3 :.
f
..g
- g. ; 1 Q."., _'.: :* 5 :
.?
g-1
)
/, y je
?.%.
j l
Mr. James P. O'Reilly, Director V
Region 1 f
Directorate of Regulatory Operations j
U. S. Atonic Energy Comission f
631 Park Avenue I
King of Prussia, Pennsylvania 19406
Dear Mr. O'Reilly,
As defined by Technical Specifications for Connecticut Yankee Atonic Power Station Section 5.3 (a), the following inforcation l
}
concerning an unsatisfactory test of one of three lov. pressurizer pressure trip units is hereby reported as an Abnormal Occurrence.
i' In accordance with the surveillance requirenents of Section 4.2 of the Connecticut Yankee Technical Specifications, pressurizer i
pressure instru ent setpoints are tested every six weeks. During the pressurizer pressure surveillance test conducted June 20, 1974, one of the three low pressurizer pressure trip units operated approricately 15 psi beyond the acceptance criteria. A trip signal was inoerced to satisfy the 1/2 logic required for full power operation. The faulty trip unit was replaced and vill.be bench l
tested to deter =ine the cause of the incorrect trip setpoint. A follow-up report will be subnitted in ten days.
. Vary truly yours.
l
~%
hF.W.Hartley I
l Plant Superintendent 1
RHC/jwa i
i cc: DOL, Washington, D.
C..
o-4
_- - - -