PWRRM November 2016

pwrrm@retaqs.com

6 participants
3 discussions

Re: [Pwrrm] PWRRM Digest, Vol 83, Issue 2 - Methods to going critical
by Gore, Duane 21 Nov '16

21 Nov '16

STP dilutes to critical (ARO) after a refueling outage. Subsequent startups are pull-to-critical. Duane Gore, P.E. Supervisor, Reactor Analysis Nuclear Fuel & Analysis STPNOC degore(a)stpegs.com (361) 972-8909 (w) (979) 318-6314 (c) (361-972-8081 (fax) -----Original Message----- From: PWRRM [mailto:pwrrm-bounces@retaqs.com] On Behalf Of pwrrm-request(a)retaqs.com Sent: Thursday, November 17, 2016 10:02 AM To: pwrrm(a)retaqs.com Subject: PWRRM Digest, Vol 83, Issue 2 **THIS EMAIL IS FROM AN EXTERNAL SENDER OUTSIDE OF THE STPNOC NETWORK. BE CAUTIOUS ABOUT CLICKING LINKS OR OPENING ATTACHMENTS FROM UNKNOWN SOURCES. DO NOT PROVIDE PERSONAL INFORMATION SUCH AS SS#, USER ID/PASSWORD, ETC.** Send PWRRM mailing list submissions to pwrrm(a)retaqs.com To subscribe or unsubscribe via the World Wide Web, visit http://www.keffective.com/mailman/listinfo/pwrrm or, via email, send a message with subject or body 'help' to pwrrm-request(a)retaqs.com You can reach the person managing the list at pwrrm-owner(a)retaqs.com When replying, please edit your Subject line so it is more specific than "Re: Contents of PWRRM digest..."

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final approach to critical, boron dilute or pull rods?
by Kenneth Pike 17 Nov '16

17 Nov '16

Do you still position rods and dilute to critical during initial startup after a refueling? On a mid cycle startup do you dilute to critical boron then pull rods to critical or position control rod at estimated critical position and dilute to critical? TVA is interested in what method other plants are using to achieve criticality. Thanks Ken Pike (610) 277-8991 x 253

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Re: [Pwrrm] final approach to critical, boron dilute or pull rods?
by David D Goff 17 Nov '16

17 Nov '16

At D. C. Cook, we will dilute to ARO BOC critical unless we have performed a Subcritical Physics Testing endpoint. In those cases, we have pulled to critical targeting CD at 135 steps. For mid-cycle startups, we pull to critical targeting CD at 135 steps. From: PWRRM [mailto:pwrrm-bounces@retaqs.com] On Behalf Of Kenneth Pike Sent: Wednesday, November 16, 2016 3:08 PM To: pwrrm(a)retaqs.com Subject: [EXTERNAL] [Pwrrm] final approach to critical, boron dilute or pull rods? Do you still position rods and dilute to critical during initial startup after a refueling? On a mid cycle startup do you dilute to critical boron then pull rods to critical or position control rod at estimated critical position and dilute to critical? TVA is interested in what method other plants are using to achieve criticality. Thanks Ken Pike (610) 277-8991 x 253

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PWRRM November 2016