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Nuclear plants for Entergy, NextEra, SNC, Exelon, and TVA also use the SDP. As a consultant, it helped to ease the transition from one utility to the other.
Emerson/Rosemount has an official FMEA document that may be worth reviewing:
I would classify the situation you are describing as a “fail dangerous” scenario as defined in that document: “Failure that deviates the measured input state or the actual output by more than 2% of span and that leaves the output within active scale (including frozen output).”
It mentions impulse line clogging; could that be a possibility? Is the failure repeatable after swapping transmitters (if that’s an option)?
It’s a shame they don’t require that the fine be paid to the whistleblower. I wonder what they’re doing now?
Your instinct is right–HFE should consider more than just operations.
For sure it’s primarily intended for operations since operators are most heavily involved in interacting with plant controls and indicators. But human factors engineering isn’t limited to them.
Here’s an extract from the executive summary of NUREG-0711, Revision 3 (Human Factors Engineering Program Review Model):
“The overall purpose of the NRC staff’s HFE program review is to verify that:
• The applicant integrates HFE into the development, design, and evaluation of the plant.
• The applicant provides HFE products (e.g., HSIs) that facilitate the safe, efficient, and reliable performance of operations, maintenance, tests, inspections, and surveillance tasks.
• The HFE program and its products reflect state-of-the-art human factors principles [cf. Title 10, Part 50.34(f)(2)(iii), of the Code of Federal Regulations (10 CFR 50.34(f)) and 10 CFR 52.47(a)(8)], and satisfy all specific regulatory requirements”The Digital Engineering Guide (DEG) has an entire section, Section 6, dedicated to HFE. During the initial scoping phase, it states your task is to “Identify any impacts that potentially affect or introduce human-system interfaces, or any impacts that affect or introduce tasks required of an operator or maintenance technician.”
The DEG references EPRI Report 3002004310 (Human Factors Guidance for Control Room and Digital Human-System Interface Design and Modification) for additional help and guidance.
There’s no guarantee or requirement that all motors will be either induction or synchronous. Here’s a decent paper:
https://www.erlphase.com/downloads/papers/CBIP2010_Considerations_And_Methods_For_Effective_FBT.pdf
Thanks for sharing. Interesting concept. The article says there will be an industry webinar in August, and that the plan is to have a reactor design and lander ready to go by 2026 (about five and a half years from now).
Based on the data in the article, a 10 kW moon reactor would power the equivalent of about 7 US homes on earth. Looks like the research will be led by INL.
Anyone have any good ideas to submit?
Try now. I revised the post to remove the embedded content.
I don’t like the way those clowns look.
Good question. It should be out, but it was hard to locate a copy. Here’s a link:
https://www.nrc.gov/docs/ML2013/ML20135H168.pdf
In the Federal Register (link below), it’s given ADAMS Accession No. ML20135H168. It doesn’t show up in the database when I search for it, but you can access it.
Regulatory Guide 1.187, Revision 2, was issued in June 2020 and endorses Appendix D, Revision 1.
https://www.nrc.gov/docs/ML2012/ML20125A730.pdf
The public has until August 6, 2020, to make comments on RG 1.187 (Revision 2) because there were so many changes:
https://www.govinfo.gov/content/pkg/FR-2020-07-07/pdf/2020-14564.pdfOops. Bad link.
