ML20078P069
| ML20078P069 | |
| Person / Time | |
|---|---|
| Site: | Byron  |
| Issue date: | 10/27/1983 |
| From: | COMMONWEALTH EDISON CO. |
| To: | |
| Shared Package | |
| ML20078P057 | List: |
| References | |
| 7510N, PROC-831027-02, NUDOCS 8311030186 | |
| Download: ML20078P069 (2) | |
Text
.
4 ATTACHMENT C CONTAINMENT PURGE SYSTEM INTERIM OPERATION PLAN 71 l
i l-l-
l l
l October 27, 1983 l-
-7510N-l 8311030186 831027
~ ~ ~
PDR ADOCK 05000454 A
f v
]
jIIIb Primary Containment Purge System The Primary Containment Purge System'is subdivided into three
- non-safety-related subsystems, (1) miniflow purge, (2) normal purge and-(3) post-LOCA purge.
These~subsysters serve the containment (1) during normal plant operating conditio.'s. (2)-during planned
- reactor' shutdowns, and (3) during post-LOCA operating conditions, p
respectively..
-A_ separate purge system is provided for each unit.
A complete system description is provided-in Section19.4.9 of the Byron /Braidwood FSAR.,Preoperational test requirements are
~
provided in-FSAR' Table 14.2-39.
These requirements call'for the
. Purge System to be operational and tested prior to Unit 1 Fuel' Load.
~
During Fuel Loa'd and during low power startup' testing the. fission L
product inventory in the. reactor core 11s trivial by comparison with the inventories. employed by the FSAR safety. analyses.
There will-
~
be no significant release of-radioactivity resulting from either normal operation,1 from. a loss-of-coolant-accident or from a core unloading event.. As a result, there is no need-for the Purge
' System-to be operational during this perico.
Only containment
- isolation needs to be verified prior to core loadEto contain the small amounts ~ of radioactivity which may be released,
Consequently the startup and. testing plan for the Unit 1 Primary Containment Purge: System has been changed.to the following:'
l.
Prior to Unit 1 Fuel Load:
All Unit 1 containment purge isolation valves will be leak tested.
c
. 2.
Prior-to Unit 1-Operation above 5% power:
p i
.a)
The"42" containment purge valves will not be opened during oepration.
If any of the other purge isolation valves need to'be" opened:
1)-'the automatic actuation circuitry testing will be
_ complete.
2)
.the structural integrity of the purge duct will be
-verified to assure that there are no unmonitored leak
- paths.
.b.
'The entire purge system will be operational, balanced, and preoperationally tested prior to operation above approximately 5% power.
L, This-startup plan will allow low power testing to be performed without causing.any unacceptable levels of risk to the public s<
health and safety.
I.
7510N t
4 2
w