At Surry Power Station, we had an event where our control rods automatically stepped out 2 steps due to an incorrect Tave-Tref deviation indication. There has been talk of disabling automatic rod withdrawal here at the station and I wanted to know what other plants have done regarding this system. Has your plant disabled the Automatic rod withdrawal function? If not, why not? Are there plans to do so?
Charlene Chotalal Reactor Engineer Surry Power Station Work: (757)-365-2819 Email: Charlene.N.Chotalal@dom.com
"I have to go count neutrons at the plant. Conservation of mass. It's the law!"
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At Summer we leave our rods in auto. While we recognize that some plants disable auto or only allow auto-insertion, so as to only allow auto-stepping in a conservative direction, it still remains that the auto function is there to keep the plant at nominal, analyzed conditions, and our preference is to let it do just that.
Mike Strickland
Reactor Engineering
V.C. Summer Nuclear Station
Work (803) 345-4625
Cell (803) 622-6881
Pager (803) 251-5767
From: pwrrm@retaqs.com [mailto:pwrrm@retaqs.com] On Behalf Of Charlene.N.Chotalal@dom.com Sent: Tuesday, September 16, 2008 2:46 PM To: pwrrm@retaqs.com Subject: [Pwrrm] Request for Information: Automatic Rod withdrawal
At Surry Power Station, we had an event where our control rods automatically stepped out 2 steps due to an incorrect Tave-Tref deviation indication. There has been talk of disabling automatic rod withdrawal here at the station and I wanted to know what other plants have done regarding this system. Has your plant disabled the Automatic rod withdrawal function? If not, why not? Are there plans to do so?
Charlene Chotalal Reactor Engineer Surry Power Station Work: (757)-365-2819 Email: Charlene.N.Chotalal@dom.com
"I have to go count neutrons at the plant. Conservation of mass. It's the law!"
CONFIDENTIALITY NOTICE: This electronic message contains information which may be legally confidential and/or privileged and does not in any case represent a firm ENERGY COMMODITY bid or offer relating thereto which binds the sender without an additional express written confirmation to that effect. The information is intended solely for the individual or entity named above and access by anyone else is unauthorized. If you are not the intended recipient, any disclosure, copying, distribution, or use of the contents of this information is prohibited and may be unlawful. If you have received this electronic transmission in error, please reply immediately to the sender that you have received the message in error, and delete it. Thank you.
Beaver Valley Units 1& 2 Response:
Beaver Valley had issues with these "nuisance" rod stepping events and they were impacting the reactivity PI. As a result, we implemented disabling the auto rod withdrawal a few years ago for both units.
Anthony (A.R.) Burger Supervisor, Reactor Engineering FENOC - Beaver Valley Power Station Phone: (724) 682-4108 Cell: (724) 601-3224 FAX: (724) 682-4250 Email: aburger@firstenergycorp.com
Charlene.N.Chotal al@dom.com Sent by: To pwrrm@retaqs.com pwrrm@retaqs.com cc
09/16/2008 02:46 Subject PM [Pwrrm] Request for Information: Automatic Rod withdrawal
Please respond to PWR Reactivity Management <pwrrm@retaqs.com >
At Surry Power Station, we had an event where our control rods automatically stepped out 2 steps due to an incorrect Tave-Tref deviation indication. There has been talk of disabling automatic rod withdrawal here at the station and I wanted to know what other plants have done regarding this system. Has your plant disabled the Automatic rod withdrawal function? If not, why not? Are there plans to do so?
Charlene Chotalal Reactor Engineer Surry Power Station Work: (757)-365-2819 Email: Charlene.N.Chotalal@dom.com
"I have to go count neutrons at the plant. Conservation of mass. It's the law!"
CONFIDENTIALITY NOTICE: This electronic message contains information which may be legally confidential and/or privileged and does not in any case represent a firm ENERGY COMMODITY bid or offer relating thereto which binds the sender without an additional express written confirmation to that effect. The information is intended solely for the individual or entity named above and access by anyone else is unauthorized. If you are not the intended recipient, any disclosure, copying, distribution, or use of the contents of this information is prohibited and may be unlawful. If you have received this electronic transmission in error, please reply immediately to the sender that you have received the message in error, and delete it. Thank you._______________________________________________ PWRRM mailing list PWRRM@retaqs.com http://www.keffective.com/mailman/listinfo/pwrrm
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Waterford-3 keeps system off unless we have a Reactor Power Cutback (turbine or feed pump trip resulting in dropping 4 or 8 rods depending on what is selected, for immediate power reduction).
Clint Alday
-----Original Message----- From: pwrrm@retaqs.com [mailto:pwrrm@retaqs.com] On Behalf Of Charlene.N.Chotalal@dom.com Sent: Tuesday, September 16, 2008 1:46 PM To: pwrrm@retaqs.com Subject: [Pwrrm] Request for Information: Automatic Rod withdrawal
At Surry Power Station, we had an event where our control rods automatically stepped out 2 steps due to an incorrect Tave-Tref deviation indication. There has been talk of disabling automatic rod withdrawal here at the station and I wanted to know what other plants have done regarding this system. Has your plant disabled the Automatic rod withdrawal function? If not, why not? Are there plans to do so?
Charlene Chotalal Reactor Engineer Surry Power Station Work: (757)-365-2819 Email: Charlene.N.Chotalal@dom.com
"I have to go count neutrons at the plant. Conservation of mass. It's the law!"
CONFIDENTIALITY NOTICE: This electronic message contains information which may be legally confidential and/or privileged and does not in any case represent a firm ENERGY COMMODITY bid or offer relating thereto which binds the sender without an additional express written confirmation to that effect. The information is intended solely for the individual or entity named above and access by anyone else is unauthorized. If you are not the intended recipient, any disclosure, copying, distribution, or use of the contents of this information is prohibited and may be unlawful. If you have received this electronic transmission in error, please reply immediately to the sender that you have received the message in error, and delete it. Thank you.
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aburger＠firstenergycorp.com -
ALDAY, CLINT L -
Charlene.N.Chotalal＠dom.com -
STRICKLAND, MICHAEL