# PARCS and RadWatch (without the physics) - Sandra Bogetic and Ryan Pavlovsky

September 24, 2014 at 5-6:30pm in BIDS, 190 Doe Library

# Attending

• Sandra Bogetic
• Christian DiSanzo
• Alejandra Jolodosky
• James
• Kelly Rowland
• Jasmina Vujic
• Rachel Slaybaugh
• Massimiliano Fratoni
• Katy Huff
• Dan Wooten
• Aaron Culich
• Madicken Munk
• Kedar Kolluri
• James Bevins

# Discussion: PARCS

## Sandra Bogetic

Sandra Bogetic is a first year graduate student in the Nuclear Engineering Department.

## PARCS

PARCS is a powerful tool, but it seems to have struggles with version control, and would strongly benefit from a more transparent and controlled release procedure.

Since it is an NQA-1 code…. its surprising that it is not under version control.

### Input Files

• Generation of cross sections can be done in various ways. These include CASMO, HELIOS, and TRITON
• The input for thermal hydraulic behavior can be enered into PARCS or coupled using PATH, TRACE, and/or RELAP. For a PWR, you can do it in TH.
• Depletion can be done by PARCS, but sometimes you don’t want to do it with PARCS because perhaps you have done depletion in some other code (such as SIMULATE). PARCS allows you to input this external data.
• The input file formatting is in blocks.
• CNTL, XSEC, GEOM, PARAM, TH, TRAN, etc.
• ata can be repeated using an asterisk
• Input ends with a .
• etc.

### Options

There are many options that can or should be specified. The core type, core power, simulation behavior concerning Xe and Sm (will you input the values, do you want them to be at equilibrium, transient, etc), control rod banking positions, external thermal hydraulics linkages, print options, whether or not to conduct depletion, etc.

Additionally, there is a tree variable for cross section definitions.

The geometry card of course is very important. The core compositions are all defined for the assemblies, reflector, etc. Typical boundary conditions are available.

### Examples

Examples can be found in the presentation, but will not be shared online.

# Discussion: RadWatch (without all the physics)

## Ryan Pavlovsky

Ryan is a graduate student in the Nuclear Engineering Department.

## Linux and Unix tools within RadWatch

### The stack

Sensor input, python, smpt, datetime, python, cron, scp, ssh, ssh-agent, pytables, matplotlib, scp, yes, drupal, jquery

### CROn

CROn is for scheduling jobs.

Crontab -e can be used to edit the cron file for your user space. Don’t freak out if it’s empty. Just use a template from your toplevel cron file or find a template on the internet to fill out.

Ryan reminds us of the importance of the man page. If you need more help with the crontab command, try man crontab in your terminal to figure out its secrets. (Man pages are opened in a program called less. So, to get out of the man page, type “q”.)

Note that your system may have a cron.allow file. That file, if it exists, names the people allowed to create cron jobs.

### SSH

Ryan points out that there are two versions of ssh (client and server). They have their own configuration files!

Note the config file located in /etc/ssh/ssh_config, but also, note the one in your home directory ~/.ssh/config and the one for server daemon configuration /etc/ssh/sshd_config. NOTE: on MACOSX, there may not be an additional ssh directory layer in etc. So, find those files at /etc/ssh_config and /etc/sshd_config.

Fun Fact DSA has a stronger random number generator than RSA, but RSA is used more widely. This is likely because RSA encription is faster and (more compressed?) than DSA.

Code examples from Ryan’s talk can be found here in the master branch.