ML20206T408
| ML20206T408 | |
| Person / Time | |
|---|---|
| Site: | Braidwood  |
| Issue date: | 04/16/1987 |
| From: | Hunsader S COMMONWEALTH EDISON CO. |
| To: | Murley T Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20206T413 | List: |
| References | |
| 2979K, NUDOCS 8704230174 | |
| Download: ML20206T408 (2) | |
Text
g y-3co aum f
- ~7 q One First National Plaza, Chicago, Illinois
\\
/ Address Reply 12 Post Offee Box 767 U Chicago, Illinois 60690 - 0767 April 16, 1987 Mr. Thomas E. Murley, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C. 20555
Subject:
Braidwood Station Units 1 and 2 Interim Operation of HVAC Systems NRC Docket Nos. 50-456 and 50-457
Reference:
(a) March 27, 1987 K.A. Ainger letter to H.R. Denton
Dear Mr. Murley:
Reference (a) provided filter test data for the Braidwood control room ventilation (VC) recirculation charcoal filters with a justification indicating a 90% filter efficiency is appropriate for control room dose calculations even though ANSI-N509 acceptance criteria had not been met.
Subsequently without any system alterations, additional testing has been performed and this letter provides the additional test data for the VC A train and B train recirculation charcoal filters airflow distribution and mixing uniformity tests. The results are summarized in Attachment A.
Prompt NRC review and approval of this matter is requested so the Braidwood VC system can be declared operable.
Please direct any questions you may have concerning this matter _to this office.
Very truly yours, 8704230174 870416 n
PDR ADOCK 05000456 S. C. Hunsader P
PDR Nuclear Licensing Administrator
/klj cc:
J. Stevens NRC Resident Inspector-Braidwood att.
, q 29,9x e
ATTACHMENT A~
Control Room Recirculation Carbon Filter Train A ANSI-NSIO Test Data Airflow Distribution i 20% of
+ 27.7%
Test (126 readings) average velocity
-37.1%
Air-Aerosol Mixing i 20% of
+ 31.5%
Test (126 readings) average
-30.0%
concentration Train B ANSI-NSIO Test Data Airflow Distribution i 20% of
+ 28.1%
Test (126 readings) average velocity
-30.4%
Air-Aerosol Mixing i 20% of
+ 57.3%
. Test (126 readings) average
-44.0%
concentration 1
(
l L
2979K i
(
I l
I
=...
...--