ML19308B826
| ML19308B826 | |
| Person / Time | |
|---|---|
| Site: | Crane, Davis Besse  |
| Issue date: | 11/01/1977 |
| From: | Joseph Kelly BABCOCK & WILCOX CO. |
| To: | Finnin R, Karrasch B, Swanson E BABCOCK & WILCOX CO. |
| References | |
| TASK-TF, TASK-TMR NUDOCS 8001170393 | |
| Download: ML19308B826 (1) | |
Text
.
.c
- -.,d
/
L l
THE BABC0CX & WILCOX COMPAtlY p
i
~
h
' POWER GEllERATION GROUP
.Ta l
}
Distribution From
/
i J. J. Kelly, Plant Integration gj/
aos ees.s Cust.
File No.
or Ref.
Generic Subj.
Date Customer Guidance On High Pressure Injection Operation November 1, 1977 l m. i... i.....,..........,........ mi.
..s,.
DISTRIBUTION B. A. Karrasch /
D. W. IaBelle E. W. Swanson N. S. Elliott R. J. F1enin D. F. Hallman /
B. M. Dunn /
~
Two recent events at the Toledo site have pointed out that perhaps we are not giving our custo=crs enough guidance on the operation of the high pres -
sure injection systes. On Septe=ber 24., 1977, after depressurizing due to a stuck open electromatic relief valve, high pressure injection was auto-matically initiated. The operator stopped HPI when pressurizer. level began to recover, without regard to primary pressure. As a result, the transient continued on with boiling in the RCS, etc.
In a similar occurrence on October 23, 1977, the operator bypassed high pressure injection to prevent initiation, even though reactcr coolant system pressure went below the actuation point.
[.
Since there are accidents which require the continuous operation of the high pressure injection system, I wonder what guidance, if any, we should be giv-ing to our customers on when they can safely shut the system down following an accident? I recommend the following guidelines be sent:
\\
[#
a) Do not bypass or otherwise prevent the actuation of high/ low
'7 pressure injection under any conditions except a nor=al, controlled plant shutdown.
' t" h
b) Once high/ low pressure injection is initiated, do not stop it unless:
h Tave is stable or decreasing and pressurizer level is increasing and
,h primary pressure is at least 1600 PSIG and increasing.
I would appreciate your thoughts on this subject.
h fp0W
~
1 f ~~~~~
m sy
&jf. $ftS. '
h
'~
(aw Sw soo u go 3 9.3
~~
A b m&
d,J s > p$4 j f 7~
"ZP/' ".J Ad-per/
. 4 e nudu axC 9 u s &.
wnc.,
JJK:jl
.