RE: Radiochemistry; N-16 equilibrium in coolant ???

["Kanter, Seth J(Z55008)" <SKANTER@apsc.com>]

Jim,

Our calculated equilibrium concentration of N-16 at the reactor vessel 
outlet nozzle is ~160 uCi/ml.  Obviously with such a short half life, 
the general range of N-16 concentrations will vary most by loop 
transport time (PWRs). Loop transport time at PVNGS is 4 seconds. Our 
RCS sample piping is designed so that the overall transient time from 
the loop to the containment wall is approximately 90 seconds to permit 
for N-16 decay, so as long as our S/Gs maintain their integrity, N-16 
isn't much of a consideration here (except for power entries that 
require entry into the RCP Bays).

However, I believe our BWR colleagues may be able to provide more 
insight into the N-16 issue.

Regards, Seth.

Health Physicist
Palo Verde Nuclear Generating Station


----------
From: 	James G. Barnes[SMTP:mail15077@pop.net]
Sent: 	Monday, July 28, 1997 9:23 AM
To: 	Multiple recipients of list
Subject: 	Radiochemistry; N-16 equilibrium in coolant ???

Good morning, all.

We have a question for our power reactor colleagues.

What is a typical equilibrium concentration of N-16 in reactor 
coolant?  What
is the general range of such conentrations?

Thanks,

Jim Barnes, CHP
Radiation Safety Officer
Rocketdyne Division; Boeing North American