SMR developments: August 2026
16 recorded developments dated August 2026: 3 permission or environmental decisions, 1 application, 10 project developments, 1 announcement, 1 policy step.
Entries are placed by their recorded date, not by when SMRMap added them. Entries dated only to a quarter or year are not assigned to a month. Each entry is dated when the development happened unless its label says otherwise, such as “Announced” or “Report dated”. A date recorded only to a month, quarter or year is shown that way. Targets are plans, not achievements or commitments.
Recorded developments
· Recorded development
Radiant's Kaleidos reactor ships from El Segundo to INL #
Radiant's Kaleidos reactor shipped from El Segundo to INL.
Checking notes
Kaleidos reactor ships from El Segundo to INL.
· Recorded development
Tarapur approved as site for BSMR-200 and SMR-55 lead units, DAE tells Parliament #
Written answers to Parliament posted in August and September 2026 state that the Atomic Energy Commission approved Tarapur as the site and gave in-principle approval for engineering and construction. Sanction and regulator consent are not reported.
Checking notes
Written answers posted in August and September 2026 state Atomic Energy Commission approval of Tarapur as the site and in-principle approval for engineering and construction; sanction and regulator consent are not reported.
Announced · Regulatory step
Deep Fission announces DOE approval of its Gravity pilot NSDA #
Deep Fission announced approval of the NSDA for its Gravity pilot at Parsons. The agreement defines an early safety framework and separate later readiness, startup and operating steps. The announcement is not an NRC licence or evidence of operating authority.
A later public NSDA cover attributes the approval to a DOE letter dated 14 July.
Checking notes
Deep Fission announced NSDA approval on 6 August 2026. Its later public NSDA cover attributes approval to DOE letter CLN260841 dated 14 July, which was not opened. The agreement defines an early safety framework and separate later readiness, startup and operating steps. This announcement is not an NRC licence or evidence of operating authority.
· Recorded development
Long Mott: Commission dismisses applicant's appeal after contentions ruled moot #
The Commission dismissed Long Mott Energy's appeal of the Licensing Board's January 2026 ruling admitting an intervenor, because the Board had since dismissed both admitted contentions as moot. This is an adjudicatory order, not a permit decision; the construction-permit application remains under review.
Checking notes
The Commission dismissed Long Mott Energy's appeal of the Licensing Board's January 2026 ruling admitting an intervenor, because the Board had since dismissed both admitted contentions as moot. It took no position on the intervenor's separate petition for review. This is an adjudicatory order, not a permit decision; the construction-permit application remains under review.
· Recorded development
NRC holds mandatory hearing on Clinch River construction permit #
The NRC held a mandatory hearing on the Clinch River construction permit for TVA's BWRX-300.
Checking notes
NRC mandatory hearing on Clinch River construction permit.
· Recorded development
Myanmar: Russian prime minister says implementation of the agreements is starting #
The Russian prime minister said during the Myanmar president's visit that implementation of the agreements is starting. The site is still not named.
Checking notes
Statement by the Russian prime minister during the Myanmar president's visit; the site is still not named.
Reported · Recorded development
Report: Rosatom expects Myanmar survey contract by end of 2026, site work in 2027 #
Atomic Energy 2.0, relaying Strana Rosatom, reported that Rosatom expects to sign a contract for primary engineering surveys by the end of 2026 and begin site work in 2027. These remain plans; the site is not named.
The report describes an 18 August government meeting but does not separately date the Rosatom statement.
Checking notes
Atomic Energy 2.0 reported on 24 August 2026, relaying Strana Rosatom, that Rosatom expects to sign a contract for primary engineering surveys by the end of 2026 and begin site work in 2027. The report describes the 18 August government meeting but does not separately date the Rosatom statement. The first stage is two RITM-200N reactors of 55 MW each, with possible later expansion to 330 MW. These remain plans; the site is not named. The event date is the report date.
Announced · Announcement
Blykalla reports application for up to eight SEALER units at Untra, Tierp #
Blykalla reports an application for up to eight units and up to 440 MWe in total. Operation in the first half of the 2030s is conditional on approvals. No construction is established.
Checking notes
Company reports an application for up to eight units and up to 440 MWe total. First-half-2030s operation is conditional on approvals; no construction is established.
· Application submitted
Blykalla applies for Government approval of eight lead-cooled SMRs at Untra, Tierp #
Blykalla AB applied for the Government's approval of eight lead-cooled small modular reactors of about 440 MW in total at Untra in Tierp municipality. Approval would replace the Environmental Code permissibility review, but not licensing under the Environmental Code and the Nuclear Activities Act. Approval needs municipal consent and a facility plan in force.
Received 26 August. Facility plan assigned 28 August to Uppsala county administrative board, due 30 April 2027.
Checking notes
Blykalla AB applied on 25 August 2026 (recorded as received on 26 August) for the Government's approval of eight lead-cooled small modular reactors of about 440 MW in total at Untra in Tierp municipality; on 28 August 2026 the Government assigned the Uppsala county administrative board to draft a facility plan by 30 April 2027. It is an application under the Act on the Government's approval of nuclear facilities (SFS 2026:585), which the Government's status page of 2 October 2026 lists as under preparation. Approval needs municipal consent and a facility plan in force; it would replace the Environmental Code permissibility review but not licensing under the Environmental Code and the Nuclear Activities Act. No approval, licence or construction is established.
· Environmental decision recorded
NRC finds no significant environmental impact for Pioneer excavation-wall exemption #
The NRC issued an environmental assessment and finding of no significant impact covering the environmental effects of the requested Pioneer support-of-excavation-wall exemption. It is not the 28 August exemption and does not issue a limited work authorization or construction permit.
Made available: 24 August 2026. The later exemption notice describes it as issued on 25 August.
Checking notes
The NRC made an environmental assessment and finding of no significant impact available on 24 August 2026; its later exemption notice describes the finding as issued on 25 August. It addresses environmental effects of the requested support-of-excavation-wall exemption; it is not the 28 August exemption and does not issue an LWA or construction permit.
· Recorded development
Government assigns Uppsala county administrative board to draft Untra facility plan #
The Government assigned the Uppsala county administrative board to draft a facility plan for Untra.
Checking notes
Government assigns Uppsala county administrative board to draft a facility plan for Untra.
· Other regulatory action recorded
NRC allows specified Pioneer excavation walls before a limited work authorization #
The NRC issued a narrow exemption allowing specified permanent support-of-excavation walls at Pioneer Units 1 and 2 before a limited work authorization. It does not issue or commit to a limited work authorization or construction permit, or show that physical work began.
Checking notes
The NRC issued a narrow exemption on 28 August 2026 allowing specified permanent support-of-excavation walls at Pioneer Units 1 and 2 before a limited work authorization. The notice does not issue or commit to an LWA or construction permit. The exemption does not show that physical work began or authorize all construction.
· Recorded development
Untra Nuclear Power AB applies for Swedish state support #
Untra Nuclear Power AB applied for Swedish state support.
Checking notes
Untra Nuclear Power AB applies for Swedish state support.
· Recorded development
NRC completes draft safety evaluation report for Pioneer, with information gaps #
The NRC completed a draft safety evaluation report, with information gaps, for Holtec Pioneer Units 1 and 2 (SMR-300 at Palisades).
Checking notes
NRC draft safety evaluation report (with information gaps) completed.
· Comment period closed
Comments close on NRC proposal to modernize reactor licensing, oversight and siting #
Comments closed on the NRC proposal, published on 16 July 2026 under the Commission's revision of its rules ordered by Executive Order 14300. The proposal is not in effect.
Checking notes
NRC proposal published 16 July 2026 under the Commission's revision of its rules ordered by Executive Order 14300; comments closed 31 August 2026. It is not in effect.
· Other regulatory action recorded
NNSA approves safety design criteria for the Xuwei high-temperature reactor #
NNSA approved B-version safety design criteria for the Xuwei HTGR. Its later announcement describes a small nuclear power reactor with multiple modules and one turbine. The criteria guide safety review; they are not a construction licence.
Checking notes
NNSA instrument 国核安发〔2026〕161号, signed 31 August 2026, approves B-version safety design criteria for the Xuwei HTGR. Its later 29 September announcement describes a small nuclear power reactor with multiple modules and one turbine. The criteria guide safety review and are not a construction licence.
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