The NSDA's safety limits (page 25) set 'Maximum continuous power: 100 kWth' and 'Maximum short duration power (1hr): 250 kWth'; its design table (page 52) says '≤250 kWth (Limited tests)'. Valar's unlisted 'Ward 250 By the Numbers' page (28 June 2026, still containing placeholders such as 'July XX') says the reactor is 'licensed' for 30 effective full-power days at 100 kWt 'and up to one day at 250kWt'. If the page's day means one continuous day, it would be 24 times the NSDA's per-run limit; if it is a total across runs, the two can fit. Neither document says which. The final DSA and TSRs, which set the authorized limit, are not public, so which figure DOE approved is unknown. DOE's categorical exclusion and Valar's NSDA web summary describe Ward 250 simply as a 250 kWth reactor; ANS (June 2026) reports that Taylor 'has indicated the Ward 250 is a 100-kWt reactor', and POWER describes it as rated at 100 kWt initial test power (orig-011, orig-031). Ward 250 has no NRC license; 'licensed' is the company's word for a DOE authorization.

• Ward250 Nuclear Safety Design Agreement, No. 100403, Rev 02 (status: Draft; issued for Public Release) (Valar Atomics, 2025-10) primary company “Maximum short duration power (1hr): 250 kWth”
• Ward 250 By the Numbers (unlisted company page with placeholders, signed Isaiah Taylor) (Valar Atomics (Isaiah Taylor), 2026-06-28) primary company “up to one day at 250kWt”
• NEPA Determination DOE-ID-26-005: Valar Ward250 Research Reactor (categorical exclusion B5.26) (U.S. Department of Energy, Office of Nuclear Energy (Idaho), 2026-04-22) primary government “Ward250 is a 250 kilowatt thermal (kWth) high temperature gas-cooled reactor”
• Valar's Ward 250 reaches criticality in Utah (American Nuclear Society, Nuclear Newswire, 2026-06-22) news “has indicated the Ward 250 is a 100-kWt reactor”
• Valar Atomic's Ward 250 Becomes Second Reactor to Go Critical Under DOE Pilot Program (POWER magazine (Sonal C. Patel), 2026-06-19) news “rated at 100 kWt initial test power and scalable to 5 MWe”